Merge pull request #15985 from KrissKr0ss/modsuits

[READY FOR MERGE] Modsuits

code/__DEFINES/achievements.dm

@@ -35,6 +35,7 @@
 #define MEDAL_HOT_DAMN "Hot Damn!"
 #define MEDAL_CAYENNE_DISK "Very Important Piscis"
 #define MEDAL_TRAM_SURFER "Tram Surfer"
+#define MEDAL_SPRINGLOCK "The Man Inside the Modsuit"
 
 //Skill medal hub IDs
 #define MEDAL_LEGENDARY_MINER "Legendary Miner"

code/__DEFINES/dcs/signals.dm

@@ -474,6 +474,8 @@
 #define COMSIG_ITEM_AFTERATTACK "item_afterattack"				//from base of obj/item/afterattack(): (atom/target, mob/user, params)
 #define COMSIG_ITEM_ALT_AFTERATTACK "item_alt_afterattack"		//from base of obj/item/altafterattack(): (atom/target, mob/user, proximity, params)
 #define COMSIG_ITEM_EQUIPPED "item_equip"						//from base of obj/item/equipped(): (/mob/equipper, slot)
+/// A mob has just unequipped an item.
+#define COMSIG_MOB_UNEQUIPPED_ITEM "mob_unequipped_item"
 	// Do not grant actions on equip.
 	#define COMPONENT_NO_GRANT_ACTIONS		1
 #define COMSIG_ITEM_DROPPED "item_drop"							//from base of obj/item/dropped(): (mob/user)

code/__DEFINES/dcs/signals/signals_medical.dm

@@ -0,0 +1,14 @@
+/// From /datum/surgery/New(): (datum/surgery/surgery, surgery_location (body zone), obj/item/bodypart/targeted_limb)
+#define COMSIG_MOB_SURGERY_STARTED "mob_surgery_started"
+
+/// From /datum/surgery_step/success(): (datum/surgery_step/step, mob/living/target, target_zone, obj/item/tool, datum/surgery/surgery, default_display_results)
+#define COMSIG_MOB_SURGERY_STEP_SUCCESS "mob_surgery_step_success"
+
+/// From /obj/item/shockpaddles/proc/do_success(): (obj/item/shockpaddles/source)
+#define COMSIG_DEFIBRILLATOR_SUCCESS "defib_success"
+	#define COMPONENT_DEFIB_STOP (1<<0)
+
+/// From /datum/surgery/can_start(): (mob/source, datum/surgery/surgery, mob/living/patient)
+#define COMSIG_SURGERY_STARTING "surgery_starting"
+	#define COMPONENT_CANCEL_SURGERY (1<<0)
+	#define COMPONENT_FORCE_SURGERY (1<<1)

code/__DEFINES/dcs/signals/signals_mod.dm

@@ -0,0 +1,35 @@
+//MODsuit signals
+/// Called when a module is selected to be the active one from on_select(obj/item/mod/module/module)
+#define COMSIG_MOD_MODULE_SELECTED "mod_module_selected"
+/// Called when a MOD deploys one or more of its parts.
+#define COMSIG_MOD_DEPLOYED "mod_deployed"
+/// Called when a MOD retracts one or more of its parts.
+#define COMSIG_MOD_RETRACTED "mod_retracted"
+/// Called when a MOD is finished toggling itself.
+#define COMSIG_MOD_TOGGLED "mod_toggled"
+/// Called when a MOD activation is called from toggle_activate(mob/user)
+#define COMSIG_MOD_ACTIVATE "mod_activate"
+	/// Cancels the suit's activation
+	#define MOD_CANCEL_ACTIVATE (1 << 0)
+/// Called when a MOD finishes having a module removed from it.
+#define COMSIG_MOD_MODULE_REMOVED "mod_module_removed"
+/// Called when a MOD finishes having a module added to it.
+#define COMSIG_MOD_MODULE_ADDED "mod_module_added"
+/// Called when a MOD is having modules removed from crowbar_act(mob/user, obj/crowbar)
+#define COMSIG_MOD_MODULE_REMOVAL "mod_module_removal"
+	/// Cancels the removal of modules
+	#define MOD_CANCEL_REMOVAL (1 << 0)
+/// Called when a module attempts to activate, however it does. At the end of checks so you can add some yourself, or work on trigger behavior (mob/user)
+#define COMSIG_MODULE_TRIGGERED "mod_module_triggered"
+	/// Cancels activation, with no message. Include feedback on your cancel.
+	#define MOD_ABORT_USE (1<<0)
+/// Called when a module activates, after all checks have passed and cooldown started.
+#define COMSIG_MODULE_ACTIVATED "mod_module_activated"
+/// Called when a module deactivates, after all checks have passed.
+#define COMSIG_MODULE_DEACTIVATED "mod_module_deactivated"
+/// Called when a module is used, after all checks have passed and cooldown started.
+#define COMSIG_MODULE_USED "mod_module_used"
+/// Called when the MODsuit wearer is set.
+#define COMSIG_MOD_WEARER_SET "mod_wearer_set"
+/// Called when the MODsuit wearer is unset.
+#define COMSIG_MOD_WEARER_UNSET "mod_wearer_unset"

code/__DEFINES/dcs/signals/signals_reagent.dm

@@ -0,0 +1,2 @@
+///Sent by /datum/reagents/proc/reaction, used for /obj/item/mod/module/springlock
+#define COMSIG_ATOM_EXPOSE_REAGENTS "atom_expose_reagents"

code/__DEFINES/mod.dm

@@ -0,0 +1,40 @@
+/// Default value for the max_complexity var on MODsuits
+#define DEFAULT_MAX_COMPLEXITY 15
+
+/// Default cell drain per process on MODsuits
+#define DEFAULT_CHARGE_DRAIN 5
+
+/// Default time for a part to seal
+#define MOD_ACTIVATION_STEP_TIME (2 SECONDS)
+
+/// Passive module, just acts when put in naturally.
+#define MODULE_PASSIVE 0
+/// Usable module, does something when you press a button.
+#define MODULE_USABLE 1
+/// Toggle module, you turn it on/off and it does stuff.
+#define MODULE_TOGGLE 2
+/// Actively usable module, you may only have one selected at a time.
+#define MODULE_ACTIVE 3
+
+//Defines used by the theme for clothing flags and similar
+#define CONTROL_LAYER "control_layer"
+#define HELMET_FLAGS "helmet_flags"
+#define CHESTPLATE_FLAGS "chestplate_flags"
+#define GAUNTLETS_FLAGS "gauntlets_flags"
+#define BOOTS_FLAGS "boots_flags"
+
+#define UNSEALED_LAYER "unsealed_layer"
+#define UNSEALED_CLOTHING "unsealed_clothing"
+#define SEALED_CLOTHING "sealed_clothing"
+#define UNSEALED_INVISIBILITY "unsealed_invisibility"
+#define SEALED_INVISIBILITY "sealed_invisibility"
+#define UNSEALED_COVER "unsealed_cover"
+#define SEALED_COVER "sealed_cover"
+#define CAN_OVERSLOT "can_overslot"
+
+//Defines used to override MOD clothing's icon and worn icon files in the skin.
+#define MOD_ICON_OVERRIDE "mod_icon_override"
+#define MOD_WORN_ICON_OVERRIDE "mod_worn_icon_override"
+
+/// Global list of all /datum/mod_theme
+GLOBAL_LIST_INIT(mod_themes, setup_mod_themes())

code/__DEFINES/traits.dm

@@ -158,6 +158,18 @@
 #define TRAIT_CALCIUM_HEALER	"calcium_healer"
 #define TRAIT_MAGIC_CHOKE		"magic_choke"
 #define TRAIT_CAPTAIN_METABOLISM "captain-metabolism"
+/// Like antimagic, but doesn't block the user from casting
+#define TRAIT_ANTIMAGIC_NO_SELFBLOCK "anti_magic_no_selfblock"
+/// Gives us turf, mob and object vision through walls
+#define TRAIT_XRAY_VISION "xray_vision"
+/// Gives us mob vision through walls and slight night vision
+#define TRAIT_THERMAL_VISION "thermal_vision"
+/// Gives us turf vision through walls and slight night vision
+#define TRAIT_MESON_VISION "meson_vision"
+/// Gives us Night vision
+#define TRAIT_TRUE_NIGHT_VISION "true_night_vision"
+/// Lets us scan reagents
+#define TRAIT_REAGENT_SCANNER "reagent_scanner"
 #define TRAIT_ABDUCTOR_TRAINING "abductor-training"
 #define TRAIT_ABDUCTOR_SCIENTIST_TRAINING "abductor-scientist-training"
 #define TRAIT_SURGEON           "surgeon"
@@ -213,8 +225,6 @@
 #define TRAIT_AUTO_CATCH_ITEM	"auto_catch_item"
 #define TRAIT_CLOWN_MENTALITY	"clown_mentality" // The future is now, clownman.
 #define TRAIT_FREESPRINT		"free_sprinting"
-#define TRAIT_XRAY_VISION       "xray_vision"
-#define TRAIT_THERMAL_VISION    "thermal_vision"
 #define TRAIT_NO_TELEPORT		"no-teleport" //you just can't
 #define TRAIT_NO_INTERNALS		"no-internals"
 #define TRAIT_TOXIC_ALCOHOL		"alcohol_intolerance"
@@ -387,3 +397,5 @@
 #define STATION_TRAIT_FILLED_MAINT "station_trait_filled_maint"
 #define STATION_TRAIT_EMPTY_MAINT "station_trait_empty_maint"
 #define STATION_TRAIT_PDA_GLITCHED "station_trait_pda_glitched"
+/// Trait applied by MODsuits.
+#define MOD_TRAIT "mod"

code/_globalvars/lists/maintenance_loot.dm

@@ -53,6 +53,8 @@ GLOBAL_LIST_INIT(maintenance_loot, list(
 	/obj/item/airlock_painter/decal/tile = 1,
 	/obj/item/stack/cable_coil/random = 4,
 	/obj/item/stack/cable_coil/random/five = 6,
+	/obj/item/mod/construction/broken_core = 5,
+	/obj/item/mod/module/springlock = 1,
 	/obj/item/stack/medical/suture = 1,
 	/obj/item/stack/rods/ten = 9,
 	/obj/item/stack/rods/twentyfive = 1,

code/_onclick/hud/radial.dm

@@ -91,6 +91,8 @@ GLOBAL_LIST_EMPTY(radial_menus)
 		else
 			py_shift = 32
 			restrict_to_dir(NORTH) //I was going to parse screen loc here but that's more effort than it's worth.
+	else if(hudfix_method && AM.loc)
+		anchor = get_atom_on_turf(anchor)
 
 //Sets defaults
 //These assume 45 deg min_angle

code/datums/achievements/misc_achievements.dm

@@ -171,3 +171,9 @@
 	desc = "Lights out, guerilla radio!"
 	database_id = MEDAL_TRAM_SURFER
 	icon = "tram_surfer"
+
+/datum/award/achievement/misc/springlock
+	name = "The Man Inside the MODsuit"
+	desc = "Ignore the warning label on a springlock MODsuit."
+	database_id = MEDAL_SPRINGLOCK
+	icon = "springlock"

code/datums/components/crafting/recipes/recipes_misc.dm

@@ -554,6 +554,19 @@
 	subcategory = CAT_MISCELLANEOUS
 	category = CAT_MISCELLANEOUS
 
+/datum/crafting_recipe/mod_core
+	name = "MOD core"
+	result = /obj/item/mod/construction/core
+	tools = list(TOOL_SCREWDRIVER)
+	time = 10 SECONDS
+	reqs = list(/obj/item/stack/cable_coil = 5,
+				/obj/item/stack/rods = 2,
+				/obj/item/stack/sheet/glass = 1,
+				/obj/item/organ/heart = 1
+				)
+	subcategory = CAT_MISCELLANEOUS
+	category = CAT_MISCELLANEOUS
+
 //////////////
 //Banners/////
 //////////////

code/datums/components/gps.dm

@@ -20,14 +20,22 @@ GLOBAL_LIST_EMPTY(GPS_list)
 /datum/component/gps/item
 	var/updating = TRUE //Automatic updating of GPS list. Can be set to manual by user.
 	var/global_mode = TRUE //If disabled, only GPS signals of the same Z level are shown
+	/// UI state of GPS, altering when it can be used.
+	var/datum/ui_state/state = null
 
-/datum/component/gps/item/Initialize(_gpstag = "COM0", emp_proof = FALSE, starton = TRUE)
+/datum/component/gps/item/Initialize(_gpstag = "COM0", emp_proof = FALSE, starton = TRUE, state = null, overlay_state = "working")
 	. = ..()
 	if(. == COMPONENT_INCOMPATIBLE || !isitem(parent))
 		return COMPONENT_INCOMPATIBLE
+
+	if(isnull(state))
+		state = GLOB.default_state
+	src.state = state
+
 	var/atom/A = parent
 	if(starton)
-		A.add_overlay("working")
+		if(overlay_state)
+			A.add_overlay(overlay_state)
 	else
 		tracking = FALSE
 	A.name = "[initial(A.name)] ([gpstag])"
@@ -93,6 +101,9 @@ GLOBAL_LIST_EMPTY(GPS_list)
 		ui.open()
 	ui.set_autoupdate(updating)
 
+/datum/component/gps/item/ui_state(mob/user)
+	return state
+
 /datum/component/gps/item/ui_data(mob/user)
 	var/list/data = list()
 	data["power"] = tracking

code/datums/wires/mod.dm

@@ -0,0 +1,56 @@
+/datum/wires/mod
+	holder_type = /obj/item/mod/control
+	proper_name = "MOD control unit"
+	req_knowledge = JOB_SKILL_MASTER
+	req_skill = JOB_SKILL_TRAINED
+
+/datum/wires/mod/New(atom/holder)
+	wires = list(WIRE_DISABLE, WIRE_SHOCK, WIRE_INTERFACE)
+	add_duds(3)
+	..()
+
+/datum/wires/mod/interactable(mob/user)
+	if(!..())
+		return FALSE
+	var/obj/item/mod/control/mod = holder
+	return mod.open
+
+/datum/wires/mod/get_status()
+	var/obj/item/mod/control/mod = holder
+	var/list/status = list()
+	status += "The orange light is [mod.seconds_electrified ? "on" : "off"]."
+	status += "The red light is [mod.malfunctioning ? "off" : "blinking"]."
+	status += "The yellow light is [mod.interface_break ? "off" : "on"]."
+	return status
+
+/datum/wires/mod/on_pulse(wire)
+	var/obj/item/mod/control/mod = holder
+	switch(wire)
+		if(WIRE_DISABLE)
+			mod.malfunctioning = TRUE
+		if(WIRE_SHOCK)
+			mod.seconds_electrified = MACHINE_DEFAULT_ELECTRIFY_TIME
+		if(WIRE_INTERFACE)
+			mod.interface_break = !mod.interface_break
+
+/datum/wires/mod/on_cut(wire, mend)
+	var/obj/item/mod/control/mod = holder
+	switch(wire)
+		if(WIRE_HACK)
+			if(!mend)
+				mod.req_access = list()
+		if(WIRE_DISABLE)
+			mod.malfunctioning = !mend
+		if(WIRE_SHOCK)
+			if(mend)
+				mod.seconds_electrified = MACHINE_NOT_ELECTRIFIED
+			else
+				mod.seconds_electrified = MACHINE_ELECTRIFIED_PERMANENT
+		if(WIRE_INTERFACE)
+			mod.interface_break = !mend
+
+/datum/wires/mod/ui_act(action, params)
+	var/obj/item/mod/control/mod = holder
+	if(!issilicon(usr) && mod.seconds_electrified && mod.shock(usr))
+		return FALSE
+	return ..()

code/game/machinery/rechargestation.dm

@@ -1,6 +1,6 @@
 /obj/machinery/recharge_station
-	name = "cyborg recharging station"
-	desc = "This device recharges cyborgs and resupplies them with materials."
+	name = "recharging station"
+	desc = "This device recharges energy dependent lifeforms, like cyborgs, ethereals and MODsuit users."
 	icon = 'icons/obj/objects.dmi'
 	icon_state = "borgcharger0"
 	density = FALSE
@@ -10,7 +10,7 @@
 	req_access = list(ACCESS_ROBOTICS)
 	state_open = TRUE
 	circuit = /obj/item/circuitboard/machine/cyborgrecharger
-	occupant_typecache = list(/mob/living/silicon/robot)
+	occupant_typecache = list(/mob/living/silicon/robot, /mob/living/carbon/human)
 	var/recharge_speed
 	var/repairs
 

code/game/machinery/suit_storage_unit.dm

@@ -10,11 +10,15 @@
 	var/obj/item/clothing/suit/space/suit = null
 	var/obj/item/clothing/head/helmet/space/helmet = null
 	var/obj/item/clothing/mask/mask = null
+	var/obj/item/mod/control/mod = null
 	var/obj/item/storage = null
 
 	var/suit_type = null
 	var/helmet_type = null
 	var/mask_type = null
+	/// What type of MOD the unit starts with when spawned.
+	var/mod_type = null
+	/// What type of additional item the unit starts with when spawned.
 	var/storage_type = null
 
 	state_open = FALSE
@@ -27,6 +31,8 @@
 	var/uv_cycles = 6
 	var/message_cooldown
 	var/breakout_time = 300
+	/// How fast it charges cells in a suit
+	var/charge_rate = 250
 
 /obj/machinery/suit_storage_unit/standard_unit
 	suit_type = /obj/item/clothing/suit/space/eva
@@ -38,21 +44,50 @@
 	mask_type = /obj/item/clothing/mask/gas/sechailer
 	storage_type = /obj/item/tank/jetpack/oxygen/captain
 
+/obj/machinery/suit_storage_unit/captainmod
+	mask_type = /obj/item/clothing/mask/gas/sechailer
+	storage_type = /obj/item/tank/jetpack/oxygen/captain
+	mod_type = /obj/item/mod/control/pre_equipped/magnate
+
 /obj/machinery/suit_storage_unit/engine
 	suit_type = /obj/item/clothing/suit/space/hardsuit/engine
 	mask_type = /obj/item/clothing/mask/breath
 	storage_type= /obj/item/clothing/shoes/magboots
 
+/obj/machinery/suit_storage_unit/enginemod
+	mask_type = /obj/item/clothing/mask/breath
+	mod_type = /obj/item/mod/control/pre_equipped/engineering
+
+/obj/machinery/suit_storage_unit/atmos
+	suit_type = /obj/item/clothing/suit/space/hardsuit/engine/atmos
+	mask_type = /obj/item/clothing/mask/breath
+	storage_type = /obj/item/watertank/atmos
+
+/obj/machinery/suit_storage_unit/atmosmod
+	mask_type = /obj/item/clothing/mask/breath
+	storage_type = /obj/item/watertank/atmos
+	mod_type = /obj/item/mod/control/pre_equipped/atmospheric
+
 /obj/machinery/suit_storage_unit/ce
 	suit_type = /obj/item/clothing/suit/space/hardsuit/engine/elite
 	mask_type = /obj/item/clothing/mask/breath
 	storage_type= /obj/item/clothing/shoes/magboots/advance
 
+/obj/machinery/suit_storage_unit/cemod
+	mask_type = /obj/item/clothing/mask/breath
+	storage_type = /obj/item/clothing/shoes/magboots/advance
+	mod_type = /obj/item/mod/control/pre_equipped/advanced
+
 /obj/machinery/suit_storage_unit/security
 	suit_type = /obj/item/clothing/suit/space/hardsuit/security
 	mask_type = /obj/item/clothing/mask/gas/sechailer
 	storage_type = /obj/item/tank/jetpack/oxygen/security
 
+/obj/machinery/suit_storage_unit/securitymod
+	mask_type = /obj/item/clothing/mask/gas/sechailer
+	mod_type = /obj/item/mod/control/pre_equipped/security
+
+
 /obj/machinery/suit_storage_unit/hos
 	suit_type = /obj/item/clothing/suit/space/hardsuit/security/hos
 	mask_type = /obj/item/clothing/mask/gas/sechailer
@@ -63,6 +98,11 @@
 	mask_type = /obj/item/clothing/mask/gas
 	storage_type = /obj/item/watertank/atmos
 
+/obj/machinery/suit_storage_unit/hosmod
+	mask_type = /obj/item/clothing/mask/gas/sechailer
+	storage_type = /obj/item/tank/internals/oxygen
+	mod_type = /obj/item/mod/control/pre_equipped/safeguard
+
 /obj/machinery/suit_storage_unit/mining
 	suit_type = /obj/item/clothing/suit/hooded/explorer/standard
 	mask_type = /obj/item/clothing/mask/gas/explorer
@@ -71,6 +111,16 @@
 	suit_type = /obj/item/clothing/suit/space/hardsuit/mining
 	mask_type = /obj/item/clothing/mask/breath
 
+/obj/machinery/suit_storage_unit/mining/evahos
+	suit_type = null
+	mask_type = /obj/item/clothing/mask/breath
+	mod_type = /obj/item/mod/control/pre_equipped/mining
+
+/obj/machinery/suit_storage_unit/medicalmod
+	mask_type = /obj/item/clothing/mask/breath/medical
+	storage_type = /obj/item/tank/internals/oxygen
+	mod_type = /obj/item/mod/control/pre_equipped/medical
+
 /obj/machinery/suit_storage_unit/cmo
 	suit_type = /obj/item/clothing/suit/space/hardsuit/medical
 	mask_type = /obj/item/clothing/mask/breath
@@ -81,15 +131,29 @@
 	helmet_type = /obj/item/clothing/head/helmet/space/eva/paramedic
 	mask_type = /obj/item/clothing/mask/breath
 
+/obj/machinery/suit_storage_unit/cmomod
+	mask_type = /obj/item/clothing/mask/breath/medical
+	storage_type = /obj/item/tank/internals/oxygen
+	mod_type = /obj/item/mod/control/pre_equipped/rescue
+
 /obj/machinery/suit_storage_unit/rd
 	suit_type = /obj/item/clothing/suit/space/hardsuit/rd
 	mask_type = /obj/item/clothing/mask/breath
 
+/obj/machinery/suit_storage_unit/rdmod
+	mask_type = /obj/item/clothing/mask/breath
+	mod_type = /obj/item/mod/control/pre_equipped/research
+
 /obj/machinery/suit_storage_unit/syndicate
 	suit_type = /obj/item/clothing/suit/space/hardsuit/syndi
 	mask_type = /obj/item/clothing/mask/gas/syndicate
 	storage_type = /obj/item/tank/jetpack/oxygen/harness
 
+/obj/machinery/suit_storage_unit/syndicatemod
+	mask_type = /obj/item/clothing/mask/gas/syndicate
+	storage_type = /obj/item/tank/jetpack/oxygen/harness
+	mod_type = /obj/item/mod/control/pre_equipped/nuclear
+
 /obj/machinery/suit_storage_unit/ert/command
 	suit_type = /obj/item/clothing/suit/space/hardsuit/ert
 	mask_type = /obj/item/clothing/mask/breath
@@ -129,6 +193,8 @@
 		helmet = new helmet_type(src)
 	if(mask_type)
 		mask = new mask_type(src)
+	if(mod_type)
+		mod = new mod_type(src)
 	if(storage_type)
 		storage = new storage_type(src)
 	update_icon()
@@ -137,6 +203,7 @@
 	QDEL_NULL(suit)
 	QDEL_NULL(helmet)
 	QDEL_NULL(mask)
+	QDEL_NULL(mod)
 	QDEL_NULL(storage)
 	return ..()
 
@@ -154,7 +221,7 @@
 			. += "broken"
 		else
 			. += "open"
-			if(suit)
+			if(suit || mod)
 				. += "suit"
 			if(helmet)
 				. += "helm"
@@ -175,6 +242,7 @@
 	helmet = null
 	suit = null
 	mask = null
+	mod = null
 	storage = null
 	occupant = null
 
@@ -241,6 +309,8 @@
 			qdel(suit) // Delete everything but the occupant.
 			mask = null
 			qdel(mask)
+			mod = null
+			qdel(mod)
 			storage = null
 			qdel(storage)
 			// The wires get damaged too.
@@ -262,6 +332,9 @@
 			if(mask)
 				things_to_clear += mask
 				things_to_clear += mask.GetAllContents()
+			if(mod)
+				things_to_clear += mod
+				things_to_clear += mod.GetAllContents()
 			if(storage)
 				things_to_clear += storage
 				things_to_clear += storage.GetAllContents()
@@ -279,6 +352,20 @@
 		if(occupant)
 			dump_contents()
 
+/obj/machinery/suit_storage_unit/process(delta_time)
+	var/obj/item/stock_parts/cell/cell
+	if(mod)
+		if(!istype(mod))
+			return
+		if(!mod.cell)
+			return
+		cell = mod.cell
+	else
+		return
+
+	use_power(charge_rate * delta_time)
+	cell.give(charge_rate * delta_time)
+
 /obj/machinery/suit_storage_unit/proc/shock(mob/user, prb)
 	if(!prob(prb))
 		var/datum/effect_system/spark_spread/s = new /datum/effect_system/spark_spread
@@ -353,6 +440,13 @@
 			if(!user.transferItemToLoc(I, src))
 				return
 			mask = I
+		else if(istype(I, /obj/item/mod/control))
+			if(mod)
+				to_chat(user, span_warning("The unit already contains a MOD!"))
+				return
+			if(!user.transferItemToLoc(I, src))
+				return
+			mod = I
 		else
 			if(storage)
 				to_chat(user, "<span class='warning'>The auxiliary storage compartment is full!</span>")
@@ -405,6 +499,10 @@
 		data["mask"] = mask.name
 	else
 		data["mask"] = null
+	if(mod)
+		data["mod"] = mod.name
+	else
+		data["mod"] = null
 	if(storage)
 		data["storage"] = storage.name
 	else
@@ -435,7 +533,7 @@
 		if("uv")
 			if(occupant && safeties)
 				return
-			else if(!helmet && !mask && !suit && !storage && !occupant)
+			else if(!helmet && !mask && !mod && !suit && !storage && !occupant)
 				return
 			else
 				if(occupant)
@@ -447,7 +545,7 @@
 			if(!state_open)
 				return
 
-			var/static/list/valid_items = list("helmet", "suit", "mask", "storage")
+			var/static/list/valid_items = list("helmet", "suit", "mask", "mod", "storage")
 			var/item_name = params["item"]
 			if(item_name in valid_items)
 				var/obj/item/I = vars[item_name]

code/game/objects/items.dm

@@ -399,7 +399,7 @@ GLOBAL_VAR_INIT(embedpocalypse, FALSE) // if true, all items will be able to emb
 	if(throwing)
 		throwing.finalize(FALSE)
 	if(loc == user)
-		if(!allow_attack_hand_drop(user) || !user.temporarilyRemoveItemFromInventory(src))
+		if(!allow_attack_hand_drop(user) || !user.temporarilyRemoveItemFromInventory(I = src))
 			return
 
 	. = FALSE
@@ -428,7 +428,7 @@ GLOBAL_VAR_INIT(embedpocalypse, FALSE) // if true, all items will be able to emb
 	if(throwing)
 		throwing.finalize(FALSE)
 	if(loc == user)
-		if(!user.temporarilyRemoveItemFromInventory(src))
+		if(!allow_attack_hand_drop(user) || !user.temporarilyRemoveItemFromInventory(src))
 			return
 
 	pickup(user)
@@ -1271,3 +1271,7 @@ GLOBAL_VAR_INIT(embedpocalypse, FALSE) // if true, all items will be able to emb
 /obj/item/proc/update_action_buttons(status_only = FALSE, force = FALSE)
 	for(var/datum/action/current_action as anything in actions)
 		current_action.UpdateButtonIcon(status_only, force)
+
+/// Special stuff you want to do when an outfit equips this item.
+/obj/item/proc/on_outfit_equip(mob/living/carbon/human/outfit_wearer, visuals_only, item_slot)
+	return

code/game/objects/items/defib.dm

@@ -461,6 +461,8 @@
 			cooldown = TRUE
 	busy = FALSE
 	update_icon()
+	if(SEND_SIGNAL(src, COMSIG_DEFIBRILLATOR_SUCCESS) & COMPONENT_DEFIB_STOP)
+		return
 	if(req_defib)
 		defib.cooldowncheck(user)
 	else
@@ -514,6 +516,8 @@
 				cooldown = TRUE
 			busy = FALSE
 			update_icon()
+			if(SEND_SIGNAL(src, COMSIG_DEFIBRILLATOR_SUCCESS) & COMPONENT_DEFIB_STOP)
+				return
 			if(!req_defib)
 				recharge(60)
 			if(req_defib && (defib.cooldowncheck(user)))
@@ -632,6 +636,8 @@
 					defib.deductcharge(revivecost)
 					cooldown = 1
 				update_icon()
+				if(SEND_SIGNAL(src, COMSIG_DEFIBRILLATOR_SUCCESS) & COMPONENT_DEFIB_STOP)
+					return
 				if(req_defib)
 					defib.cooldowncheck(user)
 				else

code/game/objects/items/tanks/jetpack.dm

@@ -239,9 +239,13 @@
 	return
 
 /mob/living/carbon/get_jetpack()
-	var/obj/item/tank/jetpack/J = back
-	if(istype(J))
-		return J
+	var/obj/item/I = back
+	if(istype(I, /obj/item/tank/jetpack))
+		return I
+	else if(istype(I, /obj/item/mod/control))
+		var/obj/item/mod/control/C = I
+		for(var/obj/item/mod/module/jetpack/J in C.modules)
+			return J
 
 /mob/living/carbon/human/get_jetpack()
 	var/obj/item/tank/jetpack/J = ..()

code/game/objects/structures/crates_lockers/closets/secure/engineering.dm

@@ -32,6 +32,8 @@
 	new /obj/item/clothing/head/beret/ce/white(src)
 	new /obj/item/storage/bag/construction(src)
 	new /obj/item/storage/bag/material(src)
+	new /obj/item/mod/construction/armor/advanced(src)
+	new /obj/item/mod/module/rad_protection(src)
 
 /obj/structure/closet/secure_closet/engineering_electrical
 	name = "electrical supplies locker"

code/game/objects/structures/crates_lockers/closets/secure/medical.dm

@@ -103,6 +103,8 @@
 	new	/obj/item/storage/lockbox/medal/medical(src)
 	new /obj/item/clothing/suit/hooded/wintercoat/cmo(src)
 	new /obj/item/clothing/head/beret/cmo/blue(src)
+	new /obj/item/mod/construction/armor/rescue(src)
+	new /obj/item/mod/module/health_analyzer(src)
 
 /obj/structure/closet/secure_closet/animal
 	name = "animal control"

code/game/objects/structures/crates_lockers/closets/secure/scientist.dm

@@ -31,4 +31,4 @@
 	new /obj/item/circuitboard/machine/techfab/department/science(src)
 	new /obj/item/storage/photo_album/RD(src)
 	new /obj/item/clothing/suit/hooded/wintercoat/rd(src)
-
+	new /obj/item/mod/construction/armor/research(src)

code/game/objects/structures/crates_lockers/closets/secure/security.dm

@@ -17,6 +17,8 @@
 	new /obj/item/gun/energy/e_gun(src)
 	new /obj/item/door_remote/captain(src)
 	new /obj/item/storage/photo_album/Captain(src)
+	new /obj/item/mod/construction/armor/magnate(src)
+	new /obj/item/mod/module/holster(src)
 
 /obj/structure/closet/secure_closet/hop
 	name = "\proper head of personnel's locker"
@@ -86,6 +88,9 @@
 	new /obj/item/circuitboard/machine/techfab/department/security(src)
 	new /obj/item/storage/photo_album/HoS(src)
 	new /obj/item/clothing/suit/hooded/wintercoat/hos(src)
+	new /obj/item/mod/construction/armor/safeguard(src)
+	new /obj/item/mod/module/jetpack(src)
+	new /obj/item/mod/module/holster(src)
 
 /obj/structure/closet/secure_closet/warden
 	name = "\proper warden's locker"

code/modules/cargo/packs/science.dm

@@ -238,3 +238,14 @@
 	contains = list(/obj/item/raw_anomaly_core/pyro)
 	crate_name = "raw pyro anomaly"
 	crate_type = /obj/structure/closet/crate/secure/science
+
+/datum/supply_pack/science/mod_core
+	name = "MOD core Crate"
+	desc = "Three cores, perfect for any MODsuit construction! Naturally harvested™, of course."
+	cost = CARGO_CRATE_VALUE * 3
+	access = ACCESS_ROBOTICS
+	contains = list(/obj/item/mod/construction/core,
+		/obj/item/mod/construction/core,
+		/obj/item/mod/construction/core)
+	crate_name = "MOD core crate"
+	crate_type = /obj/structure/closet/crate/secure/science

code/modules/mob/inventory.dm

@@ -337,6 +337,7 @@
 		on_item_dropped(I)
 		if(I.dropped(src) == ITEM_RELOCATED_BY_DROPPED)
 			return FALSE
+	SEND_SIGNAL(src, COMSIG_MOB_UNEQUIPPED_ITEM, I, force, newloc, no_move, invdrop, silent)
 	return TRUE
 
 //This is a SAFE proc. Use this instead of equip_to_slot()!

code/modules/mob/living/carbon/carbon.dm

@@ -28,8 +28,8 @@
 		if(prob(40))
 			if(prob(25))
 				audible_message("<span class='warning'>You hear something rumbling inside [src]'s stomach...</span>", \
-							 "<span class='warning'>You hear something rumbling.</span>", 4,\
-							  "<span class='userdanger'>Something is rumbling inside your stomach!</span>")
+								"<span class='warning'>You hear something rumbling.</span>", 4,\
+							    "<span class='userdanger'>Something is rumbling inside your stomach!</span>")
 			var/obj/item/I = user.get_active_held_item()
 			if(I && I.force)
 				var/d = rand(round(I.force / 4), I.force)
@@ -625,12 +625,21 @@
 			if(M.name == XRAY)
 				sight |= (SEE_TURFS|SEE_MOBS|SEE_OBJS)
 				see_in_dark = max(see_in_dark, 8)
+
+	if(HAS_TRAIT(src, TRAIT_TRUE_NIGHT_VISION))
+		lighting_alpha = min(lighting_alpha, LIGHTING_PLANE_ALPHA_MOSTLY_INVISIBLE)
+		see_in_dark = max(see_in_dark, 8)
+
+	if(HAS_TRAIT(src, TRAIT_MESON_VISION))
+		sight |= SEE_TURFS
+		lighting_alpha = min(lighting_alpha, LIGHTING_PLANE_ALPHA_MOSTLY_VISIBLE)
+
 	if(HAS_TRAIT(src, TRAIT_THERMAL_VISION))
-		sight |= (SEE_MOBS)
+		sight |= SEE_MOBS
 		lighting_alpha = min(lighting_alpha, LIGHTING_PLANE_ALPHA_MOSTLY_VISIBLE)
 
 	if(HAS_TRAIT(src, TRAIT_XRAY_VISION))
-		sight |= (SEE_TURFS|SEE_MOBS|SEE_OBJS)
+		sight |= SEE_TURFS|SEE_MOBS|SEE_OBJS
 		see_in_dark = max(see_in_dark, 8)
 
 	if(see_override)

code/modules/mob/living/carbon/carbon_movement.dm

@@ -16,9 +16,15 @@
 	if(istype(T) && movement_dir && T.allow_thrust(0.01))
 		return 1
 
-	var/obj/item/tank/jetpack/J = get_jetpack()
-	if(istype(J) && (movement_dir || J.stabilizers) && J.allow_thrust(0.01, src))
-		return 1
+	var/obj/item/I = get_jetpack()
+	if(istype(I, /obj/item/tank/jetpack))
+		var/obj/item/tank/jetpack/J = I
+		if((movement_dir || J.stabilizers) && J.allow_thrust(0.01, src))
+			return 1
+	else if(istype(I, /obj/item/mod/module/jetpack))
+		var/obj/item/mod/module/jetpack/J = I
+		if((movement_dir || J.stabilizers) && J.allow_thrust())
+			return 1
 
 /mob/living/carbon/Moved()
 	. = ..()

code/modules/mob/living/carbon/human/inventory.dm

@@ -308,7 +308,14 @@
 		if(equip_to_slot_if_possible(thing, ITEM_SLOT_BACK))
 			update_inv_hands()
 		return
-	if(!SEND_SIGNAL(equipped_back, COMSIG_CONTAINS_STORAGE)) // not a storage item
+	var/datum/component/storage/storage = equipped_back.GetComponent(/datum/component/storage)
+	if(istype(equipped_back, /obj/item/mod/control))
+		var/obj/item/mod/control/C = equipped_back
+		for(var/obj/item/mod/module/storage/S in C.modules)
+			if(S.stored)
+				equipped_back = S.stored
+				storage = S.stored.GetComponent(/datum/component/storage)
+	if(!storage)
 		if(!thing)
 			equipped_back.attack_hand(src)
 		else
@@ -318,10 +325,11 @@
 		if(!SEND_SIGNAL(equipped_back, COMSIG_TRY_STORAGE_INSERT, thing, src))
 			to_chat(src, "<span class='warning'>You can't fit anything in!</span>")
 		return
-	if(!equipped_back.contents.len) // nothing to take out
-		to_chat(src, "<span class='warning'>There's nothing in your backpack to take out!</span>")
+	var/atom/real_location = storage.real_location()
+	if(!real_location.contents.len) // nothing to take out
+		to_chat(src, "<span class='warning'>There's nothing in your [equipped_back.name] to take out!</span>")
 		return
-	var/obj/item/stored = equipped_back.contents[equipped_back.contents.len]
+	var/obj/item/stored = real_location.contents[real_location.contents.len]
 	if(!stored || stored.on_found(src))
 		return
 	stored.attack_hand(src) // take out thing from backpack

code/modules/mob/living/silicon/ai/ai.dm

@@ -38,8 +38,8 @@
 	var/can_be_carded = TRUE
 	var/alarms = list("Motion"=list(), "Fire"=list(), "Atmosphere"=list(), "Power"=list(), "Camera"=list(), "Burglar"=list())
 	var/viewalerts = 0
-	var/icon/holo_icon//Female is assigned when AI is created.
-	var/obj/vehicle/sealed/mecha/controlled_mech //For controlled_mech a mech, to determine whether to relaymove or use the AI eye.
+	var/icon/holo_icon //Female is assigned when AI is created.
+	var/obj/controlled_equipment //A piece of equipment, to determine whether to relaymove or use the AI eye.
 	var/radio_enabled = TRUE //Determins if a carded AI can speak with its built in radio or not.
 	radiomod = ";" //AIs will, by default, state their laws on the internal radio.
 	var/obj/item/pda/ai/aiPDA
@@ -99,6 +99,13 @@
 	var/display_icon_override
 	var/emote_display = "Neutral" //text string of the current emote we set for the status displays, to prevent logins resetting it.
 
+	var/datum/robot_control/robot_control
+	/// Station alert datum for showing alerts UI
+	var/datum/station_alert/alert_control
+	///remember AI's last location
+	var/atom/lastloc
+	interaction_range = INFINITY
+
 /mob/living/silicon/ai/Initialize(mapload, datum/ai_laws/L, mob/target_ai)
 	. = ..()
 	if(!target_ai) //If there is no player/brain inside.
@@ -173,10 +180,21 @@
 	GLOB.ai_list -= src
 	GLOB.shuttle_caller_list -= src
 	SSshuttle.autoEvac()
-	qdel(eyeobj) // No AI, no Eye
+	QDEL_NULL(eyeobj) // No AI, no Eye
+	QDEL_NULL(spark_system)
+	QDEL_NULL(malf_picker)
+	QDEL_NULL(doomsday_device)
+	// TODO: Why these no work?
+	// QDEL_NULL(robot_control)
+	QDEL_NULL(aiMulti)
+	// QDEL_NULL(alert_control)
 	malfhack = null
-
-	. = ..()
+	current = null
+	Bot = null
+	controlled_equipment = null
+	linked_core = null
+	apc_override = null
+	return ..()
 
 /mob/living/silicon/ai/IgniteMob()
 	fire_stacks = 0
@@ -410,7 +428,7 @@
 
 	if (href_list["ai_take_control"]) //Mech domination
 		var/obj/vehicle/sealed/mecha/M = locate(href_list["ai_take_control"])
-		if(controlled_mech)
+		if(controlled_equipment)
 			to_chat(src, "<span class='warning'>You are already loaded into an onboard computer!</span>")
 			return
 		if(!GLOB.cameranet.checkCameraVis(M))

code/modules/mob/living/silicon/pai/pai.dm

@@ -199,6 +199,13 @@
 /mob/living/silicon/pai/restrained(ignore_grab)
 	. = FALSE
 
+/mob/living/silicon/pai/can_interact_with(atom/target)
+	if(istype(target, /obj/item/mod/control)) // A poor workaround for enabling MODsuit control
+		var/obj/item/mod/control/C = target
+		if(C.ai == src)
+			return TRUE
+	return ..()
+
 // See software.dm for Topic()
 
 /mob/living/silicon/pai/canUseTopic(atom/movable/M, be_close=FALSE, no_dextery=FALSE, no_tk=FALSE)

code/modules/mob/mob.dm

@@ -722,7 +722,7 @@ GLOBAL_VAR_INIT(exploit_warn_spam_prevention, 0)
 			return pick(protection_sources)
 		else
 			return src
-	if((magic && HAS_TRAIT(src, TRAIT_ANTIMAGIC)) || (holy && HAS_TRAIT(src, TRAIT_HOLY)))
+	if((magic && HAS_TRAIT(src, TRAIT_ANTIMAGIC)) || (!self && magic && HAS_TRAIT(src, TRAIT_ANTIMAGIC_NO_SELFBLOCK)) || (holy && HAS_TRAIT(src, TRAIT_HOLY)))
 		return src
 
 //You can buckle on mobs if you're next to them since most are dense

code/modules/mob/mob_helpers.dm

@@ -585,7 +585,7 @@ It's fairly easy to fix if dealing with single letters but not so much with comp
 
 //Can the mob see reagents inside of containers?
 /mob/proc/can_see_reagents()
-	return stat == DEAD || silicon_privileges //Dead guys and silicons can always see reagents
+	return stat == DEAD || silicon_privileges || HAS_TRAIT(src, TRAIT_REAGENT_SCANNER) //Dead guys and silicons can always see reagents
 
 /mob/proc/is_blind()
 	SHOULD_BE_PURE(TRUE)

code/modules/mod/mod_actions.dm

@@ -0,0 +1,94 @@
+/datum/action/item_action/mod
+	background_icon_state = "bg_tech_blue"
+	icon_icon = 'icons/mob/actions/actions_mod.dmi'
+	check_flags = AB_CHECK_CONSCIOUS
+	var/obj/item/mod/control/mod
+	/// Whether this action is intended for the AI. Stuff breaks a lot if this is done differently.
+	var/ai_action = FALSE
+
+/datum/action/item_action/mod/New(Target)
+	..()
+	if(!istype(Target, /obj/item/mod/control))
+		qdel(src)
+		return
+	if(ai_action)
+		background_icon_state = "bg_tech"
+
+/datum/action/item_action/mod/Grant(mob/user)
+	mod = target
+	if(ai_action && user != mod.ai)
+		return
+	else if(!ai_action && user == mod.ai)
+		return
+	return ..()
+
+/datum/action/item_action/mod/Remove(mob/user)
+	if(ai_action && mod && user != mod.ai)
+		return
+	else if(!ai_action && mod && user == mod.ai)
+		return
+	return ..()
+
+/datum/action/item_action/mod/Trigger(trigger_flags)
+	if(!IsAvailable())
+		return FALSE
+	if(mod.malfunctioning && prob(75))
+		mod.balloon_alert(usr, "button malfunctions!")
+		return FALSE
+	return TRUE
+
+/datum/action/item_action/mod/deploy
+	name = "Deploy MODsuit"
+	desc = "Deploy/Conceal a part of the MODsuit."
+	button_icon_state = "deploy"
+
+/datum/action/item_action/mod/deploy/Trigger()
+	if(!IsAvailable())
+		return FALSE
+	mod.choose_deploy(usr)
+	return TRUE
+
+/datum/action/item_action/mod/deploy/ai
+	ai_action = TRUE
+
+/datum/action/item_action/mod/activate
+	name = "Activate MODsuit"
+	desc = "Activate/Deactivate the MODsuit."
+	button_icon_state = "activate"
+
+/datum/action/item_action/mod/activate/Trigger()
+	if(!IsAvailable())
+		return FALSE
+	mod.toggle_activate(usr)
+	return TRUE
+
+/datum/action/item_action/mod/activate/ai
+	ai_action = TRUE
+
+/datum/action/item_action/mod/module
+	name = "Toggle Module"
+	desc = "Toggle a MODsuit module."
+	button_icon_state = "module"
+
+/datum/action/item_action/mod/module/Trigger()
+	if(!IsAvailable())
+		return FALSE
+	mod.quick_module(usr)
+	return TRUE
+
+/datum/action/item_action/mod/module/ai
+	ai_action = TRUE
+
+/datum/action/item_action/mod/panel
+	name = "MODsuit Panel"
+	desc = "Open the MODsuit's panel."
+	button_icon_state = "panel"
+
+/datum/action/item_action/mod/panel/Trigger()
+	if(!IsAvailable())
+		return FALSE
+	mod.ui_interact(usr)
+	return TRUE
+
+/datum/action/item_action/mod/panel/ai
+	ai_action = TRUE

code/modules/mod/mod_activation.dm

@@ -0,0 +1,242 @@
+/// Creates a radial menu from which the user chooses parts of the suit to deploy/retract. Repeats until all parts are extended or retracted.
+/obj/item/mod/control/proc/choose_deploy(mob/user)
+	if(!length(mod_parts))
+		return
+	var/list/display_names = list()
+	var/list/items = list()
+	for(var/obj/item/piece as anything in mod_parts)
+		display_names[piece.name] = REF(piece)
+		var/image/piece_image = image(icon = piece.icon, icon_state = piece.icon_state)
+		items += list(piece.name = piece_image)
+	var/pick = show_radial_menu(user, src, items, custom_check = FALSE, require_near = TRUE, tooltips = TRUE)
+	if(!pick)
+		return
+	var/part_reference = display_names[pick]
+	var/obj/item/part = locate(part_reference) in mod_parts
+	if(!istype(part) || user.incapacitated())
+		return
+	if((active && part != helmet) || activating) // SKYRAT EDIT - Let the hair flow - ORIGINAL: if(active || activating)
+		balloon_alert(user, "deactivate the suit first!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return
+	var/parts_to_check = mod_parts - part
+	if(part.loc == src)
+		deploy(user, part)
+		for(var/obj/item/piece as anything in parts_to_check)
+			if(piece.loc != src)
+				continue
+			choose_deploy(user)
+			break
+	else
+		conceal(user, part)
+		for(var/obj/item/piece as anything in parts_to_check)
+			if(piece.loc == src)
+				continue
+			choose_deploy(user)
+			break
+
+/// Deploys a part of the suit onto the user.
+/obj/item/mod/control/proc/deploy(mob/user, part)
+	var/obj/item/piece = part
+	if(piece == gauntlets && wearer.gloves)
+		gauntlets.overslot = wearer.gloves
+		wearer.transferItemToLoc(gauntlets.overslot, gauntlets, force = TRUE)
+	if(piece == boots && wearer.shoes)
+		boots.overslot = wearer.shoes
+		wearer.transferItemToLoc(boots.overslot, boots, force = TRUE)
+	if(wearer.equip_to_slot_if_possible(piece, piece.slot_flags, qdel_on_fail = FALSE, disable_warning = TRUE))
+		ADD_TRAIT(piece, TRAIT_NODROP, MOD_TRAIT)
+		if(!user)
+			return TRUE
+		wearer.visible_message(span_notice("[wearer]'s [piece] deploy[piece.p_s()] with a mechanical hiss."),
+			span_notice("[piece] deploy[piece.p_s()] with a mechanical hiss."),
+			span_hear("You hear a mechanical hiss."))
+		playsound(src, 'sound/mecha/mechmove03.ogg', 25, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
+		return TRUE
+	else if(piece.loc != src)
+		if(!user)
+			return FALSE
+		balloon_alert(user, "[piece] already deployed!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+	else
+		if(!user)
+			return FALSE
+		balloon_alert(user, "bodypart clothed!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+	return FALSE
+
+/// Retract a part of the suit from the user
+/obj/item/mod/control/proc/conceal(mob/user, part)
+	var/obj/item/piece = part
+	REMOVE_TRAIT(piece, TRAIT_NODROP, MOD_TRAIT)
+	if(wearer)
+		wearer.transferItemToLoc(piece, src, force = TRUE)
+	if(piece == gauntlets)
+		gauntlets.show_overslot()
+	if(piece == boots)
+		boots.show_overslot()
+	if(!user)
+		return
+	wearer.visible_message(span_notice("[wearer]'s [piece] retract[piece.p_s()] back into [src] with a mechanical hiss."),
+		span_notice("[piece] retract[piece.p_s()] back into [src] with a mechanical hiss."),
+		span_hear("You hear a mechanical hiss."))
+	playsound(src, 'sound/mecha/mechmove03.ogg', 25, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
+
+/// Starts the activation sequence, where parts of the suit activate one by one until the whole suit is on
+/obj/item/mod/control/proc/toggle_activate(mob/user, force_deactivate = FALSE)
+	if(!wearer)
+		if(!force_deactivate)
+			balloon_alert(user, "put suit on back!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return FALSE
+	if(!force_deactivate && (SEND_SIGNAL(src, COMSIG_MOD_ACTIVATE, user) & MOD_CANCEL_ACTIVATE))
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return FALSE
+	for(var/obj/item/part as anything in mod_parts)
+		if(!force_deactivate && part.loc == src)
+			balloon_alert(user, "deploy all parts first!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+			return FALSE
+	if(!cell?.charge && !force_deactivate)
+		balloon_alert(user, "suit not powered!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return FALSE
+	if(open && !force_deactivate)
+		balloon_alert(user, "close the suit panel!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return FALSE
+	if(activating)
+		if(!force_deactivate)
+			balloon_alert(user, "suit already [active ? "shutting down" : "starting up"]!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return FALSE
+	for(var/obj/item/mod/module/module as anything in modules)
+		if(!module.active || module.allowed_inactive)
+			continue
+		module.on_deactivation()
+	activating = TRUE
+	to_chat(wearer, span_notice("MODsuit [active ? "shutting down" : "starting up"]."))
+	if(ai)
+		to_chat(ai, span_notice("MODsuit [active ? "shutting down" : "starting up"]."))
+
+	if(force_deactivate)
+		seal_part(boots, seal = FALSE)
+		seal_part(gauntlets, seal = FALSE)
+		seal_part(chestplate,seal =  FALSE)
+		seal_part(helmet, seal = FALSE)
+		finish_activation(on = FALSE)
+		activating = FALSE
+		to_chat(wearer, span_notice("Systems shut down. Parts unsealed. Goodbye, [wearer]."))
+		if(ai)
+			to_chat(ai, span_notice("<b>SYSTEMS DEACTIVATED. GOODBYE: \"[ai]\"</b>"))
+		playsound(src, 'sound/machines/synth_no.ogg', 50, TRUE, SHORT_RANGE_SOUND_EXTRARANGE, frequency = 6000)
+		return TRUE
+
+	if(do_after(wearer, activation_step_time, target = wearer, required_mobility_flags = NONE))
+		to_chat(wearer, span_notice("[boots] [active ? "relax their grip on your legs" : "seal around your feet"]."))
+		playsound(src, 'sound/mecha/mechmove03.ogg', 25, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
+		seal_part(boots, seal = !active)
+	else
+		return toggle_activate_fail()
+	if(do_after(wearer, activation_step_time, target = wearer, required_mobility_flags = NONE))
+		to_chat(wearer, span_notice("[gauntlets] [active ? "become loose around your fingers" : "tighten around your fingers and wrists"]."))
+		playsound(src, 'sound/mecha/mechmove03.ogg', 25, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
+		seal_part(gauntlets, seal = !active)
+	else
+		return toggle_activate_fail()
+	if(do_after(wearer, activation_step_time, target = wearer, required_mobility_flags = NONE))
+		to_chat(wearer, span_notice("[chestplate] [active ? "releases your chest" : "cinches tightly against your chest"]."))
+		playsound(src, 'sound/mecha/mechmove03.ogg', 25, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
+		seal_part(chestplate,seal =  !active)
+	else
+		return toggle_activate_fail()
+	if(do_after(wearer, activation_step_time, target = wearer, required_mobility_flags = NONE))
+		to_chat(wearer, span_notice("[helmet] hisses [active ? "open" : "closed"]."))
+		playsound(src, 'sound/mecha/mechmove03.ogg', 25, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
+		seal_part(helmet, seal = !active)
+	else
+		return toggle_activate_fail()
+	if(do_after(wearer, activation_step_time, target = wearer, required_mobility_flags = NONE))
+		to_chat(wearer, span_notice("Systems [active ? "shut down. Parts unsealed. Goodbye" : "started up. Parts sealed. Welcome"], [wearer]."))
+		if(ai)
+			to_chat(ai, span_notice("<b>SYSTEMS [active ? "DEACTIVATED. GOODBYE" : "ACTIVATED. WELCOME"]: \"[ai]\"</b>"))
+		finish_activation(on = !active)
+		if(active)
+			playsound(src, 'sound/machines/synth_yes.ogg', 50, TRUE, SHORT_RANGE_SOUND_EXTRARANGE, frequency = 6000)
+			SEND_SOUND(wearer, sound('sound/mecha/nominal.ogg',volume=50))
+		else
+			playsound(src, 'sound/machines/synth_no.ogg', 50, TRUE, SHORT_RANGE_SOUND_EXTRARANGE, frequency = 6000)
+	else
+		return toggle_activate_fail()
+	activating = FALSE
+	return TRUE
+
+/obj/item/mod/control/proc/toggle_activate_fail()
+	seal_part(boots, seal = active)
+	seal_part(gauntlets, seal = active)
+	seal_part(chestplate,seal =  active)
+	seal_part(helmet, seal = active)
+	to_chat(wearer, span_warning("[active ? "Shut down" : "Start up"] cancelled."))
+	finish_activation(on = active)
+	activating = FALSE
+	return FALSE
+
+///Seals or unseals the given part
+/obj/item/mod/control/proc/seal_part(obj/item/clothing/part, seal)
+	if(seal)
+		part.clothing_flags |= part.visor_flags
+		part.flags_inv |= part.visor_flags_inv
+		part.flags_cover |= part.visor_flags_cover
+		part.heat_protection = initial(part.heat_protection)
+		part.cold_protection = initial(part.cold_protection)
+	else
+		part.flags_cover &= ~part.visor_flags_cover
+		part.flags_inv &= ~part.visor_flags_inv
+		part.clothing_flags &= ~part.visor_flags
+		part.heat_protection = NONE
+		part.cold_protection = NONE
+	part.icon_state = "[skin]-[initial(part.icon_state)][seal ? "-sealed" : ""]"
+	part.item_state = "[skin]-[initial(part.item_state)][seal ? "-sealed" : ""]"
+	if(part == boots)
+		wearer.update_inv_shoes()
+	if(part == gauntlets)
+		wearer.update_inv_gloves()
+	if(part == chestplate)
+		wearer.update_inv_wear_suit()
+		wearer.update_inv_w_uniform()
+	if(part == helmet)
+		if(seal)
+			helmet.alternate_worn_layer = null
+		else
+			helmet.alternate_worn_layer = helmet.alternate_layer
+		wearer.update_inv_head()
+		wearer.update_inv_wear_mask()
+		wearer.update_hair()
+
+/// Finishes the suit's activation, starts processing
+/obj/item/mod/control/proc/finish_activation(on)
+	icon_state = "[skin]-control[on ? "-sealed" : ""]"
+	slowdown = on ? slowdown_active : slowdown_inactive
+	if(on)
+		for(var/obj/item/mod/module/module as anything in modules)
+			module.on_suit_activation()
+		START_PROCESSING(SSobj, src)
+	else
+		for(var/obj/item/mod/module/module as anything in modules)
+			module.on_suit_deactivation()
+		STOP_PROCESSING(SSobj, src)
+	wearer.update_equipment_speed_mods()
+	active = on
+	wearer.update_inv_back()
+
+/// Quickly deploys all the suit parts and if successful, seals them and turns on the suit. Intended mostly for outfits.
+/obj/item/mod/control/proc/quick_activation()
+	var/seal = TRUE
+	for(var/obj/item/part in mod_parts)
+		if(!deploy(null, part))
+			seal = FALSE
+	if(!seal)
+		return
+	for(var/obj/item/part in mod_parts)
+		seal_part(part, seal = TRUE)
+	finish_activation(on = TRUE)

code/modules/mod/mod_ai.dm

@@ -0,0 +1,199 @@
+/obj/item/mod/control/transfer_ai(interaction, mob/user, mob/living/silicon/ai/intAI, obj/item/aicard/card)
+	. = ..()
+	if(!.)
+		return
+	if(!open) //mod must be open
+		balloon_alert(user, "suit must be open to transfer!")
+		return
+	switch(interaction)
+		if(AI_TRANS_TO_CARD)
+			if(!ai)
+				balloon_alert(user, "no AI in suit!")
+				return
+			if(!isAI(ai))
+				balloon_alert(user, "onboard AI cannot fit in this card!")
+				return
+			balloon_alert(user, "transferring to card...")
+			if(!do_after(user, 5 SECONDS, target = src))
+				balloon_alert(user, "interrupted!")
+				return
+			if(!ai)
+				return
+			intAI = ai
+			intAI.ai_restore_power()//So the AI initially has power.
+			intAI.control_disabled = TRUE
+			intAI.radio_enabled = FALSE
+			intAI.disconnect_shell()
+			intAI.forceMove(card)
+			card.AI = intAI
+			for(var/datum/action/action as anything in actions)
+				action.Remove(intAI)
+			intAI.controlled_equipment = null
+			intAI.remote_control = null
+			balloon_alert(intAI, "transferred to a card")
+			balloon_alert(user, "AI transferred to card")
+			ai = null
+
+		if(AI_TRANS_FROM_CARD) //Using an AI card to upload to the suit.
+			intAI = card.AI
+			if(!intAI)
+				balloon_alert(user, "no AI in card!")
+				return
+			if(ai)
+				balloon_alert(user, "already has AI!")
+				return
+			if(intAI.deployed_shell) //Recall AI if shelled so it can be checked for a client
+				intAI.disconnect_shell()
+			if(intAI.stat || !intAI.client)
+				balloon_alert(user, "AI unresponsive!")
+				return
+			balloon_alert(user, "transferring to suit...")
+			if(!do_after(user, 5 SECONDS, target = src))
+				balloon_alert(user, "interrupted!")
+				return
+			if(ai)
+				return
+			balloon_alert(user, "AI transferred to suit")
+			ai_enter_mod(intAI)
+			card.AI = null
+
+/obj/item/mod/control/proc/ai_enter_mod(mob/living/silicon/ai/new_ai)
+	new_ai.control_disabled = FALSE
+	new_ai.radio_enabled = TRUE
+	new_ai.ai_restore_power()
+	new_ai.cancel_camera()
+	new_ai.controlled_equipment = src
+	new_ai.remote_control = src
+	new_ai.forceMove(src)
+	ai = new_ai
+	balloon_alert(new_ai, "transferred to a suit")
+	for(var/datum/action/action as anything in actions)
+		action.Grant(ai)
+
+/**
+ * Simple proc to insert the pAI into the MODsuit.
+ *
+ * user - The person trying to put the pAI into the MODsuit.
+ * card - The pAI card we're slotting in the MODsuit.
+ */
+
+/obj/item/mod/control/proc/insert_pai(mob/user, obj/item/paicard/card)
+	if(ai)
+		balloon_alert(user, "AI already installed!")
+		return
+	if(!card.pai || !card.pai.mind)
+		balloon_alert(user, "pAI unresponsive!")
+		return
+	balloon_alert(user, "transferring to suit...")
+	if(!do_after(user, 5 SECONDS, target = src))
+		balloon_alert(user, "interrupted!")
+		return FALSE
+	if(!user.transferItemToLoc(card, src))
+		return
+
+	card.pai.canholo = FALSE
+	ai = card.pai
+	balloon_alert(user, "pAI transferred to suit")
+	balloon_alert(ai, "transferred to a suit")
+	ai.remote_control = src
+	for(var/datum/action/action as anything in actions)
+		action.Grant(ai)
+	return TRUE
+
+/**
+ * Simple proc to extract the pAI from the MODsuit. It's the proc to call if you want to take it out,
+ * remove_pai() is there so atom_destruction() doesn't have any risk of sleeping.
+ *
+ * user - The person trying to take out the pAI from the MODsuit.
+ * forced - Whether or not we skip the checks and just eject the pAI. Defaults to FALSE.
+ * feedback - Whether to give feedback via balloon alerts or not. Defaults to TRUE.
+ */
+/obj/item/mod/control/proc/extract_pai(mob/user, forced = FALSE, feedback = TRUE)
+	if(!ai)
+		if(user && feedback)
+			balloon_alert(user, "no pAI to remove!")
+		return
+	if(!ispAI(ai))
+		if(user && feedback)
+			balloon_alert(user, "onboard AI cannot fit in this card!")
+		return
+	if(!forced)
+		if(!open)
+			if(user && feedback)
+				balloon_alert(user, "open the suit panel!")
+			return FALSE
+		if(!do_after(user, 5 SECONDS, target = src))
+			if(user && feedback)
+				balloon_alert(user, "interrupted!")
+			return FALSE
+
+	remove_pai(feedback)
+
+	if(feedback && user)
+		balloon_alert(user, "pAI removed from the suit")
+
+/**
+ * Simple proc that handles the safe removal of the pAI from a MOD control unit.
+ *
+ * Arguments:
+ * * feedback - Whether or not we want to give balloon alert feedback to the ai. Defaults to FALSE.
+ */
+/obj/item/mod/control/proc/remove_pai(feedback = FALSE)
+	if(!ispAI(ai))
+		return
+	var/mob/living/silicon/pai/pai = ai
+	var/turf/drop_off = get_turf(src)
+	if(drop_off) // In case there's no drop_off, the pAI will simply get deleted.
+		pai.card.forceMove(drop_off)
+
+	for(var/datum/action/action as anything in actions)
+		if(action.owner == pai)
+			action.Remove(pai)
+
+	if(feedback)
+		balloon_alert(pai, "removed from a suit")
+	pai.remote_control = null
+	pai.canholo = TRUE
+	pai = null
+	ai = null
+
+#define MOVE_DELAY 2
+#define WEARER_DELAY 1
+#define LONE_DELAY 5
+#define CELL_PER_STEP (DEFAULT_CHARGE_DRAIN * 2.5)
+#define AI_FALL_TIME (1 SECONDS)
+
+/obj/item/mod/control/relaymove(mob/user, direction)
+	if((!active && wearer) || !cell || cell.charge < CELL_PER_STEP  || user != ai || !COOLDOWN_FINISHED(src, cooldown_mod_move) || (wearer?.pulledby?.grab_state > GRAB_PASSIVE))
+		return FALSE
+	var/timemodifier = MOVE_DELAY * (ISDIAGONALDIR(direction) ? SQRT_2 : 1) * (wearer ? WEARER_DELAY : LONE_DELAY)
+	if(wearer && !wearer.Process_Spacemove(direction))
+		return FALSE
+	else if(!wearer && (!has_gravity() || !isturf(loc)))
+		return FALSE
+	COOLDOWN_START(src, cooldown_mod_move, movedelay * timemodifier + slowdown)
+	cell.charge = max(0, cell.charge - CELL_PER_STEP)
+	playsound(src, 'sound/mecha/mechmove01.ogg', 25, TRUE)
+	if(ismovable(wearer?.loc))
+		return wearer.loc.relaymove(wearer, direction)
+	else if(wearer)
+		ADD_TRAIT(wearer, TRAIT_MOBILITY_NOREST, MOD_TRAIT)
+		addtimer(CALLBACK(src, .proc/ai_fall), AI_FALL_TIME, TIMER_UNIQUE | TIMER_OVERRIDE)
+	var/atom/movable/mover = wearer || src
+	return step(mover, direction)
+
+#undef MOVE_DELAY
+#undef WEARER_DELAY
+#undef LONE_DELAY
+#undef CELL_PER_STEP
+#undef AI_FALL_TIME
+
+/obj/item/mod/control/proc/ai_fall()
+	if(!wearer)
+		return
+	REMOVE_TRAIT(wearer, TRAIT_MOBILITY_NOREST, MOD_TRAIT)
+
+/obj/item/mod/control/ui_state(mob/user)
+	if(user == ai)
+		return GLOB.contained_state
+	return ..()

code/modules/mod/mod_clothes.dm

@@ -0,0 +1,138 @@
+/obj/item/clothing/head/helmet/space/mod
+	name = "MOD helmet"
+	desc = "A helmet for a MODsuit."
+	icon = 'icons/obj/clothing/modsuit/mod_clothing.dmi'
+	mob_overlay_icon = 'icons/mob/clothing/modsuit/mod_clothing.dmi'
+	anthro_mob_worn_overlay = 'icons/mob/clothing/modsuit/mod_clothing_anthro.dmi'
+	icon_state = "helmet"
+	item_state = "helmet"
+	armor = list(MELEE = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 10)
+	body_parts_covered = HEAD
+	heat_protection = HEAD
+	cold_protection = HEAD
+	max_heat_protection_temperature = SPACE_SUIT_MAX_TEMP_PROTECT
+	min_cold_protection_temperature = SPACE_SUIT_MIN_TEMP_PROTECT
+	clothing_flags = THICKMATERIAL
+	resistance_flags = NONE
+	flash_protect = 0
+	clothing_flags = NONE
+	flags_inv = HIDEFACIALHAIR
+	flags_cover = NONE
+	visor_flags = THICKMATERIAL|STOPSPRESSUREDAMAGE
+	visor_flags_inv = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT
+	visor_flags_cover = HEADCOVERSMOUTH|HEADCOVERSEYES
+	var/alternate_layer = NECK_LAYER
+	var/obj/item/mod/control/mod
+	mutantrace_variation = STYLE_MUZZLE
+
+/obj/item/clothing/head/helmet/space/mod/Destroy()
+	if(!QDELETED(mod))
+		mod.helmet = null
+		mod.mod_parts -= src
+		QDEL_NULL(mod)
+	return ..()
+
+/obj/item/clothing/suit/space/mod
+	name = "MOD chestplate"
+	desc = "A chestplate for a MODsuit."
+	icon = 'icons/obj/clothing/modsuit/mod_clothing.dmi'
+	mob_overlay_icon = 'icons/mob/clothing/modsuit/mod_clothing.dmi'
+	anthro_mob_worn_overlay = 'icons/mob/clothing/modsuit/mod_clothing_anthro.dmi'
+	icon_state = "chestplate"
+	item_state = "chestplate"
+	blood_overlay_type = "armor"
+	armor = list(MELEE = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 10)
+	body_parts_covered = CHEST|GROIN
+	heat_protection = CHEST|GROIN
+	cold_protection = CHEST|GROIN
+	max_heat_protection_temperature = SPACE_SUIT_MAX_TEMP_PROTECT
+	min_cold_protection_temperature = SPACE_SUIT_MIN_TEMP_PROTECT
+	clothing_flags = THICKMATERIAL
+	flags_inv = HIDETAUR
+	visor_flags = STOPSPRESSUREDAMAGE
+	visor_flags_inv = HIDEJUMPSUIT
+	allowed = list(/obj/item/flashlight, /obj/item/tank/internals)
+	resistance_flags = NONE
+	var/obj/item/mod/control/mod
+	mutantrace_variation = STYLE_DIGITIGRADE
+
+/obj/item/clothing/suit/space/mod/Destroy()
+	if(!QDELETED(mod))
+		mod.chestplate = null
+		mod.mod_parts -= src
+		QDEL_NULL(mod)
+	return ..()
+
+/obj/item/clothing/gloves/mod
+	name = "MOD gauntlets"
+	desc = "A pair of gauntlets for a MODsuit."
+	icon = 'icons/obj/clothing/modsuit/mod_clothing.dmi'
+	mob_overlay_icon = 'icons/mob/clothing/modsuit/mod_clothing.dmi'
+	icon_state = "gauntlets"
+	item_state = "gauntlets"
+	armor = list(MELEE = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 10)
+	body_parts_covered = HANDS|ARMS
+	heat_protection = HANDS|ARMS
+	cold_protection = HANDS|ARMS
+	max_heat_protection_temperature = SPACE_SUIT_MAX_TEMP_PROTECT
+	min_cold_protection_temperature = SPACE_SUIT_MIN_TEMP_PROTECT
+	clothing_flags = THICKMATERIAL
+	resistance_flags = NONE
+	var/obj/item/mod/control/mod
+	var/obj/item/clothing/overslot
+	mutantrace_variation = STYLE_NO_ANTHRO_ICON
+
+/obj/item/clothing/gloves/mod/Destroy()
+	if(!QDELETED(mod))
+		mod.gauntlets = null
+		mod.mod_parts -= src
+		QDEL_NULL(mod)
+	return ..()
+
+/// Replaces these gloves on the wearer with the overslot ones
+
+/obj/item/clothing/gloves/mod/proc/show_overslot()
+	if(!overslot)
+		return
+	if(!mod.wearer.equip_to_slot_if_possible(overslot, overslot.slot_flags, qdel_on_fail = FALSE, disable_warning = TRUE))
+		mod.wearer.dropItemToGround(overslot, force = TRUE)
+	overslot = null
+
+/obj/item/clothing/shoes/mod
+	name = "MOD boots"
+	desc = "A pair of boots for a MODsuit."
+	icon = 'icons/obj/clothing/modsuit/mod_clothing.dmi'
+	mob_overlay_icon = 'icons/mob/clothing/modsuit/mod_clothing.dmi'
+	anthro_mob_worn_overlay = 'icons/mob/clothing/modsuit/mod_clothing_anthro.dmi'
+	icon_state = "boots"
+	item_state = "boots"
+	armor = list(MELEE = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 10)
+	body_parts_covered = FEET|LEGS
+	heat_protection = FEET|LEGS
+	cold_protection = FEET|LEGS
+	max_heat_protection_temperature = SPACE_SUIT_MAX_TEMP_PROTECT
+	min_cold_protection_temperature = SPACE_SUIT_MIN_TEMP_PROTECT
+	clothing_flags = THICKMATERIAL
+	resistance_flags = NONE
+	item_flags = NONE
+	var/obj/item/mod/control/mod
+	var/obj/item/clothing/overslot
+	mutantrace_variation = STYLE_DIGITIGRADE
+
+/obj/item/clothing/shoes/mod/Destroy()
+	if(!QDELETED(mod))
+		mod.boots = null
+		mod.mod_parts -= src
+		QDEL_NULL(mod)
+	return ..()
+
+/// Replaces these shoes on the wearer with the overslot ones
+/obj/item/clothing/shoes/mod/proc/show_overslot()
+	if(!overslot)
+		return
+	if(!mod.wearer.equip_to_slot_if_possible(overslot, overslot.slot_flags, qdel_on_fail = FALSE, disable_warning = TRUE))
+		mod.wearer.dropItemToGround(overslot, force = TRUE)
+	overslot = null
+
+/obj/item/clothing/shoes/mod/negates_gravity()
+	return clothing_flags & NOSLIP

code/modules/mod/mod_construction.dm

@@ -0,0 +1,288 @@
+/obj/item/mod/construction
+	desc = "A part used in MOD construction."
+	icon = 'icons/obj/clothing/modsuit/mod_construction.dmi'
+	item_state = "rack_parts"
+
+/obj/item/mod/construction/helmet
+	name = "MOD helmet"
+	icon_state = "helmet"
+
+/obj/item/mod/construction/chestplate
+	name = "MOD chestplate"
+	icon_state = "chestplate"
+
+/obj/item/mod/construction/gauntlets
+	name = "MOD gauntlets"
+	icon_state = "gauntlets"
+
+/obj/item/mod/construction/boots
+	name = "MOD boots"
+	icon_state = "boots"
+
+/obj/item/mod/construction/core
+	name = "MOD core"
+	icon_state = "mod-core-standard"
+	desc = "Growing in the most lush, fertile areas of the planet Sprout, there is a crystal known as the Heartbloom. \
+		These rare, organic piezoelectric crystals are of incredible cultural significance to the artist castes of the Ethereals, \
+		owing to their appearance; which is exactly similar to that of an Ethereal's heart. \n\
+		Which one you have in your suit is unclear, but either way, \
+		it's been repurposed to be an internal power source for a Modular Outerwear Device."
+
+/obj/item/mod/construction/broken_core
+	name = "broken MOD core"
+	icon_state = "mod-core"
+	desc = "An internal power source for a Modular Outerwear Device. You don't seem to be able to source any power from this one, though."
+
+/obj/item/mod/construction/broken_core/examine(mob/user)
+	. = ..()
+	. += span_notice("You could repair it with a <b>screwdriver</b>...")
+
+/obj/item/mod/construction/broken_core/screwdriver_act(mob/living/user, obj/item/tool)
+	. = ..()
+	if(!tool.use_tool(src, user, 5 SECONDS, volume = 30))
+		return
+	new /obj/item/mod/construction/core(drop_location())
+	qdel(src)
+
+/obj/item/mod/construction/armor
+	name = "MOD armor plates"
+	desc = "Armor plates used to finish a MOD."
+	icon_state = "standard-plating"
+	var/datum/mod_theme/theme = /datum/mod_theme
+
+/obj/item/mod/construction/armor/Initialize(mapload)
+	. = ..()
+	var/datum/mod_theme/used_theme = GLOB.mod_themes[theme]
+	name = "MOD [used_theme.name] armor plates"
+	desc = "[desc] [used_theme.desc]"
+	icon_state = "[used_theme.default_skin]-plating"
+
+/obj/item/mod/construction/armor/engineering
+	theme = /datum/mod_theme/engineering
+
+/obj/item/mod/construction/armor/atmospheric
+	theme = /datum/mod_theme/atmospheric
+
+/obj/item/mod/construction/armor/advanced
+	theme = /datum/mod_theme/advanced
+
+/obj/item/mod/construction/armor/mining
+	theme = /datum/mod_theme/mining
+
+/obj/item/mod/construction/armor/medical
+	theme = /datum/mod_theme/medical
+
+/obj/item/mod/construction/armor/rescue
+	theme = /datum/mod_theme/rescue
+
+/obj/item/mod/construction/armor/security
+	theme = /datum/mod_theme/security
+
+/obj/item/mod/construction/armor/safeguard
+	theme = /datum/mod_theme/safeguard
+
+/obj/item/mod/construction/armor/research
+	theme = /datum/mod_theme/research
+
+/obj/item/mod/construction/armor/cosmohonk
+	theme = /datum/mod_theme/cosmohonk
+
+/obj/item/mod/construction/armor/magnate
+	theme = /datum/mod_theme/magnate
+
+#define START_STEP "start"
+#define CORE_STEP "core"
+#define SCREWED_CORE_STEP "screwed_core"
+#define HELMET_STEP "helmet"
+#define CHESTPLATE_STEP "chestplate"
+#define GAUNTLETS_STEP "gauntlets"
+#define BOOTS_STEP "boots"
+#define WRENCHED_ASSEMBLY_STEP "wrenched_assembly"
+#define SCREWED_ASSEMBLY_STEP "screwed_assembly"
+
+/obj/item/mod/construction/shell
+	name = "MOD shell"
+	icon_state = "mod-construction_start"
+	desc = "A MOD shell."
+	var/obj/item/core
+	var/obj/item/helmet
+	var/obj/item/chestplate
+	var/obj/item/gauntlets
+	var/obj/item/boots
+	var/step = START_STEP
+
+/obj/item/mod/construction/shell/examine(mob/user)
+	. = ..()
+	var/display_text
+	switch(step)
+		if(START_STEP)
+			display_text = "It looks like it's missing a <b>MOD core</b>..."
+		if(CORE_STEP)
+			display_text = "The core seems <b>loose</b>..."
+		if(SCREWED_CORE_STEP)
+			display_text = "It looks like it's missing a <b>helmet</b>..."
+		if(HELMET_STEP)
+			display_text = "It looks like it's missing a <b>chestplate</b>..."
+		if(CHESTPLATE_STEP)
+			display_text = "It looks like it's missing <b>gauntlets</b>..."
+		if(GAUNTLETS_STEP)
+			display_text = "It looks like it's missing <b>boots</b>..."
+		if(BOOTS_STEP)
+			display_text = "The assembly seems <b>unsecured</b>..."
+		if(WRENCHED_ASSEMBLY_STEP)
+			display_text = "The assembly seems <b>loose</b>..."
+		if(SCREWED_ASSEMBLY_STEP)
+			display_text = "All it's missing is <b>external armor</b>..."
+	. += span_notice(display_text)
+
+/obj/item/mod/construction/shell/attackby(obj/item/part, mob/user, params)
+	. = ..()
+	switch(step)
+		if(START_STEP)
+			if(!istype(part, /obj/item/mod/construction/core))
+				return
+			if(!user.transferItemToLoc(part, src))
+				balloon_alert(user, "core stuck to your hand!")
+				return
+			playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+			balloon_alert(user, "core inserted")
+			core = part
+			step = CORE_STEP
+		if(CORE_STEP)
+			if(part.tool_behaviour == TOOL_SCREWDRIVER) //Construct
+				if(part.use_tool(src, user, 0, volume=30))
+					balloon_alert(user, "core screwed")
+				step = SCREWED_CORE_STEP
+			else if(part.tool_behaviour == TOOL_CROWBAR) //Deconstruct
+				if(part.use_tool(src, user, 0, volume=30))
+					core.forceMove(drop_location())
+					balloon_alert(user, "core taken out")
+				step = START_STEP
+		if(SCREWED_CORE_STEP)
+			if(istype(part, /obj/item/mod/construction/helmet)) //Construct
+				if(!user.transferItemToLoc(part, src))
+					balloon_alert(user, "helmet stuck to your hand!")
+					return
+				playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+				balloon_alert(user, "helmet added")
+				helmet = part
+				step = HELMET_STEP
+			else if(part.tool_behaviour == TOOL_SCREWDRIVER) //Deconstruct
+				if(part.use_tool(src, user, 0, volume=30))
+					balloon_alert(user, "core unscrewed")
+					step = CORE_STEP
+		if(HELMET_STEP)
+			if(istype(part, /obj/item/mod/construction/chestplate)) //Construct
+				if(!user.transferItemToLoc(part, src))
+					balloon_alert(user, "chestplate stuck to your hand!")
+					return
+				playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+				balloon_alert(user, "chestplate added")
+				chestplate = part
+				step = CHESTPLATE_STEP
+			else if(part.tool_behaviour == TOOL_CROWBAR) //Deconstruct
+				if(part.use_tool(src, user, 0, volume=30))
+					helmet.forceMove(drop_location())
+					balloon_alert(user, "helmet removed")
+					helmet = null
+					step = SCREWED_CORE_STEP
+		if(CHESTPLATE_STEP)
+			if(istype(part, /obj/item/mod/construction/gauntlets)) //Construct
+				if(!user.transferItemToLoc(part, src))
+					balloon_alert(user, "gauntlets stuck to your hand!")
+					return
+				playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+				balloon_alert(user, "gauntlets added")
+				gauntlets = part
+				step = GAUNTLETS_STEP
+			else if(part.tool_behaviour == TOOL_CROWBAR) //Deconstruct
+				if(part.use_tool(src, user, 0, volume=30))
+					chestplate.forceMove(drop_location())
+					balloon_alert(user, "chestplate removed")
+					chestplate = null
+					step = HELMET_STEP
+		if(GAUNTLETS_STEP)
+			if(istype(part, /obj/item/mod/construction/boots)) //Construct
+				if(!user.transferItemToLoc(part, src))
+					balloon_alert(user, "boots added")
+					return
+				playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+				balloon_alert(user, "You fit [part] onto [src].")
+				boots = part
+				step = BOOTS_STEP
+			else if(part.tool_behaviour == TOOL_CROWBAR) //Deconstruct
+				if(part.use_tool(src, user, 0, volume=30))
+					gauntlets.forceMove(drop_location())
+					balloon_alert(user, "gauntlets removed")
+					gauntlets = null
+					step = CHESTPLATE_STEP
+		if(BOOTS_STEP)
+			if(part.tool_behaviour == TOOL_WRENCH) //Construct
+				if(part.use_tool(src, user, 0, volume=30))
+					balloon_alert(user, "assembly secured")
+					step = WRENCHED_ASSEMBLY_STEP
+			else if(part.tool_behaviour == TOOL_CROWBAR) //Deconstruct
+				if(part.use_tool(src, user, 0, volume=30))
+					boots.forceMove(drop_location())
+					balloon_alert(user, "boots removed")
+					boots = null
+					step = GAUNTLETS_STEP
+		if(WRENCHED_ASSEMBLY_STEP)
+			if(part.tool_behaviour == TOOL_SCREWDRIVER) //Construct
+				if(part.use_tool(src, user, 0, volume=30))
+					balloon_alert(user, "assembly screwed")
+					step = SCREWED_ASSEMBLY_STEP
+			else if(part.tool_behaviour == TOOL_WRENCH) //Deconstruct
+				if(part.use_tool(src, user, 0, volume=30))
+					balloon_alert(user, "assembly unsecured")
+					step = BOOTS_STEP
+		if(SCREWED_ASSEMBLY_STEP)
+			if(istype(part, /obj/item/mod/construction/armor)) //Construct
+				var/obj/item/mod/construction/armor/external_armor = part
+				if(!user.transferItemToLoc(part, src))
+					return
+				playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+				balloon_alert(user, "suit finished")
+				var/obj/item/modsuit = new /obj/item/mod/control(drop_location(), external_armor.theme)
+				qdel(src)
+				user.put_in_hands(modsuit)
+			else if(part.tool_behaviour == TOOL_SCREWDRIVER) //Construct
+				if(part.use_tool(src, user, 0, volume=30))
+					balloon_alert(user, "assembly unscrewed")
+					step = SCREWED_ASSEMBLY_STEP
+	update_icon_state()
+
+/obj/item/mod/construction/shell/update_icon_state()
+	. = ..()
+	icon_state = "mod-construction_[step]"
+
+/obj/item/mod/construction/shell/Destroy()
+	QDEL_NULL(core)
+	QDEL_NULL(helmet)
+	QDEL_NULL(chestplate)
+	QDEL_NULL(gauntlets)
+	QDEL_NULL(boots)
+	return ..()
+
+/obj/item/mod/construction/shell/handle_atom_del(atom/deleted_atom)
+	if(deleted_atom == core)
+		core = null
+	if(deleted_atom == helmet)
+		helmet = null
+	if(deleted_atom == chestplate)
+		chestplate = null
+	if(deleted_atom == gauntlets)
+		gauntlets = null
+	if(deleted_atom == boots)
+		boots = null
+	return ..()
+
+#undef START_STEP
+#undef CORE_STEP
+#undef SCREWED_CORE_STEP
+#undef HELMET_STEP
+#undef CHESTPLATE_STEP
+#undef GAUNTLETS_STEP
+#undef BOOTS_STEP
+#undef WRENCHED_ASSEMBLY_STEP
+#undef SCREWED_ASSEMBLY_STEP

code/modules/mod/mod_control.dm

@@ -0,0 +1,575 @@
+/// MODsuits, trade-off between armor and utility
+/obj/item/mod
+	name = "Base MOD"
+	desc = "You should not see this, yell at a coder!"
+	icon = 'icons/obj/clothing/modsuit/mod_clothing.dmi'
+	mob_overlay_icon = 'icons/mob/clothing/modsuit/mod_clothing.dmi'
+	icon_state = "standard-control"
+	item_state = "standard-control"
+	mutantrace_variation = STYLE_NO_ANTHRO_ICON
+
+/obj/item/mod/control
+	name = "MOD control unit"
+	desc = "The control unit of a Modular Outerwear Device, a powered, back-mounted suit that protects against various environments."
+	icon_state = "control"
+	item_state = "control"
+	w_class = WEIGHT_CLASS_BULKY
+	slot_flags = ITEM_SLOT_BACK
+	strip_delay = 10 SECONDS
+	slowdown = 2
+	armor = list(MELEE = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 10, RAD = 0)
+	actions_types = list(
+		/datum/action/item_action/mod/deploy,
+		/datum/action/item_action/mod/activate,
+		/datum/action/item_action/mod/module,
+		/datum/action/item_action/mod/panel,
+		/datum/action/item_action/mod/deploy/ai,
+		/datum/action/item_action/mod/activate/ai,
+		/datum/action/item_action/mod/module/ai,
+		/datum/action/item_action/mod/panel/ai,
+	)
+	resistance_flags = NONE
+	max_heat_protection_temperature = SPACE_SUIT_MAX_TEMP_PROTECT
+	min_cold_protection_temperature = SPACE_SUIT_MIN_TEMP_PROTECT
+	permeability_coefficient = 0.01
+	siemens_coefficient = 0.5
+	alternate_worn_layer = BODY_FRONT_LAYER
+	/// The MOD's theme, decides on some stuff like armor and statistics.
+	var/datum/mod_theme/theme = /datum/mod_theme
+	/// Looks of the MOD.
+	var/skin = "standard"
+	/// Theme of the MOD TGUI
+	var/ui_theme = "ntos"
+	/// If the suit is deployed and turned on.
+	var/active = FALSE
+	/// If the suit wire/module hatch is open.
+	var/open = FALSE
+	/// If the suit is malfunctioning.
+	var/malfunctioning = FALSE
+	/// If the suit is currently activating/deactivating.
+	var/activating = FALSE
+	/// How long the MOD is electrified for.
+	var/seconds_electrified = MACHINE_NOT_ELECTRIFIED
+	/// If the suit interface is broken.
+	var/interface_break = FALSE
+	/// How much module complexity can this MOD carry.
+	var/complexity_max = DEFAULT_MAX_COMPLEXITY
+	/// How much module complexity this MOD is carrying.
+	var/complexity = 0
+	/// Power usage of the MOD.
+	var/cell_drain = DEFAULT_CHARGE_DRAIN
+	/// Slowdown of the MOD when not active.
+	var/slowdown_inactive = 2
+	/// Slowdown of the MOD when active.
+	var/slowdown_active = 1
+	/// How long this MOD takes each part to seal.
+	var/activation_step_time = MOD_ACTIVATION_STEP_TIME
+	/// MOD cell.
+	var/obj/item/stock_parts/cell/cell
+	/// MOD helmet.
+	var/obj/item/clothing/head/helmet/space/mod/helmet
+	/// MOD chestplate.
+	var/obj/item/clothing/suit/space/mod/chestplate
+	/// MOD gauntlets.
+	var/obj/item/clothing/gloves/mod/gauntlets
+	/// MOD boots.
+	var/obj/item/clothing/shoes/mod/boots
+	/// List of parts (helmet, chestplate, gauntlets, boots).
+	var/list/mod_parts = list()
+	/// Modules the MOD should spawn with.
+	var/list/initial_modules = list()
+	/// Modules the MOD currently possesses.
+	var/list/modules = list()
+	/// Currently used module.
+	var/obj/item/mod/module/selected_module
+	/// AI/pAI mob inhabiting the MOD.
+	var/mob/living/silicon/ai
+	/// Delay between moves as AI.
+	var/movedelay = 0
+	/// Cooldown for AI moves.
+	COOLDOWN_DECLARE(cooldown_mod_move)
+	/// Person wearing the MODsuit.
+	var/mob/living/carbon/human/wearer
+
+/obj/item/mod/control/Initialize(mapload, new_theme, new_skin)
+	. = ..()
+	if(new_theme)
+		theme = new_theme
+	theme = GLOB.mod_themes[theme]
+	slowdown_inactive = theme.slowdown_inactive
+	slowdown_active = theme.slowdown_active
+	slowdown = slowdown_inactive
+	complexity_max = theme.complexity_max
+	skin = new_skin || theme.default_skin
+	ui_theme = theme.ui_theme
+	cell_drain = theme.cell_drain
+	initial_modules += theme.inbuilt_modules
+	wires = new /datum/wires/mod(src)
+	if(ispath(cell))
+		cell = new cell(src)
+	helmet = new /obj/item/clothing/head/helmet/space/mod(src)
+	helmet.mod = src
+	mod_parts += helmet
+	chestplate = new /obj/item/clothing/suit/space/mod(src)
+	chestplate.mod = src
+	mod_parts += chestplate
+	gauntlets = new /obj/item/clothing/gloves/mod(src)
+	gauntlets.mod = src
+	mod_parts += gauntlets
+	boots = new /obj/item/clothing/shoes/mod(src)
+	boots.mod = src
+	mod_parts += boots
+	var/list/all_parts = mod_parts.Copy() + src
+	for(var/obj/item/piece as anything in all_parts)
+		piece.name = "[theme.name] [piece.name]"
+		piece.desc = "[piece.desc] [theme.desc]"
+		piece.armor = getArmor(arglist(theme.armor))
+		piece.resistance_flags = theme.resistance_flags
+		piece.heat_protection = NONE
+		piece.cold_protection = NONE
+		piece.max_heat_protection_temperature = theme.max_heat_protection_temperature
+		piece.min_cold_protection_temperature = theme.min_cold_protection_temperature
+		piece.permeability_coefficient = theme.permeability_coefficient
+		piece.siemens_coefficient = theme.siemens_coefficient
+		piece.icon_state = "[skin]-[initial(piece.icon_state)]"
+		piece.item_state = "[skin]-[initial(piece.item_state)]"
+	update_flags()
+	for(var/obj/item/mod/module/module as anything in initial_modules)
+		module = new module(src)
+		install(module)
+	RegisterSignal(src, COMSIG_ATOM_EXITED, .proc/on_exit)
+	movedelay = CONFIG_GET(number/movedelay/run_delay)
+
+/obj/item/mod/control/Destroy()
+	if(active)
+		STOP_PROCESSING(SSobj, src)
+	var/atom/deleting_atom
+	if(!QDELETED(helmet))
+		deleting_atom = helmet
+		helmet.mod = null
+		helmet = null
+		mod_parts -= deleting_atom
+		qdel(deleting_atom)
+	if(!QDELETED(chestplate))
+		deleting_atom = chestplate
+		chestplate.mod = null
+		chestplate = null
+		mod_parts -= deleting_atom
+		qdel(deleting_atom)
+	if(!QDELETED(gauntlets))
+		deleting_atom = gauntlets
+		gauntlets.mod = null
+		gauntlets = null
+		mod_parts -= deleting_atom
+		qdel(deleting_atom)
+	if(!QDELETED(boots))
+		deleting_atom = boots
+		boots.mod = null
+		boots = null
+		mod_parts -= deleting_atom
+		qdel(deleting_atom)
+	for(var/obj/item/mod/module/module as anything in modules)
+		module.mod = null
+		modules -= module
+	QDEL_NULL(ai)
+	QDEL_NULL(wires)
+	QDEL_NULL(cell)
+	return ..()
+
+/obj/item/mod/control/process(delta_time)
+	if(seconds_electrified > MACHINE_NOT_ELECTRIFIED)
+		seconds_electrified--
+	if((!cell || !cell.charge) && active && !activating)
+		power_off()
+		return PROCESS_KILL
+	var/malfunctioning_charge_drain = 0
+	if(malfunctioning)
+		malfunctioning_charge_drain = rand(1,20)
+	cell.charge = max(0, cell.charge - (cell_drain + malfunctioning_charge_drain)*delta_time)
+	update_cell_alert()
+	for(var/obj/item/mod/module/module as anything in modules)
+		if(malfunctioning && module.active && DT_PROB(5, delta_time))
+			module.on_deactivation()
+		module.on_process(delta_time)
+
+/obj/item/mod/control/equipped(mob/user, slot)
+	..()
+	if(slot == ITEM_SLOT_BACK)
+		set_wearer(user)
+	else if(wearer)
+		unset_wearer()
+
+/obj/item/mod/control/dropped(mob/user)
+	. = ..()
+	if(wearer)
+		unset_wearer()
+
+/obj/item/mod/control/item_action_slot_check(slot)
+	if(slot == ITEM_SLOT_BACK)
+		return TRUE
+
+/obj/item/mod/control/allow_attack_hand_drop(mob/user)
+	var/mob/living/carbon/carbon_user = user
+	if(!istype(carbon_user) || src != carbon_user.back)
+		return ..()
+	for(var/obj/item/part in mod_parts)
+		if(part.loc != src)
+			balloon_alert(carbon_user, "retract parts first!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, FALSE, SILENCED_SOUND_EXTRARANGE)
+			return FALSE
+	return ..()
+
+/obj/item/mod/control/MouseDrop(atom/over_object)
+	if(src != wearer?.back || !istype(over_object, /atom/movable/screen/inventory/hand))
+		return ..()
+	for(var/obj/item/part in mod_parts)
+		if(part.loc != src)
+			balloon_alert(wearer, "retract parts first!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, FALSE, SILENCED_SOUND_EXTRARANGE)
+			return
+	if(!wearer.incapacitated())
+		var/atom/movable/screen/inventory/hand/ui_hand = over_object
+		if(wearer.putItemFromInventoryInHandIfPossible(src, ui_hand.held_index))
+			add_fingerprint(usr)
+			return ..()
+
+/obj/item/mod/control/attack_hand(mob/user)
+	if(seconds_electrified && cell?.charge)
+		if(shock(user))
+			return
+	if(open && loc == user)
+		if(!cell)
+			balloon_alert(user, "no cell!")
+			return
+		balloon_alert(user, "removing cell...")
+		if(!do_after(user, 1.5 SECONDS, target = src))
+			balloon_alert(user, "interrupted!")
+			return
+		balloon_alert(user, "cell removed")
+		playsound(src, 'sound/machines/click.ogg', 50, TRUE, SILENCED_SOUND_EXTRARANGE)
+		if(!user.put_in_hands(cell))
+			cell.forceMove(drop_location())
+		update_cell_alert()
+		return
+	return ..()
+
+/obj/item/mod/control/AltClick(mob/user)
+	if(seconds_electrified && cell?.charge)
+		if(shock(user))
+			return
+	if(!open)
+		for(var/obj/item/mod/module/storage/S in modules)
+			if(S.stored)
+				playsound(user, "rustle", 50, 1, -5)
+				SEND_SIGNAL(S.stored, COMSIG_TRY_STORAGE_SHOW, wearer, TRUE)
+				return
+	. = ..()
+
+/obj/item/mod/control/screwdriver_act(mob/living/user, obj/item/screwdriver)
+	. = ..()
+	if(.)
+		return TRUE
+	if(active || activating)
+		balloon_alert(user, "deactivate suit first!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return FALSE
+	balloon_alert(user, "[open ? "closing" : "opening"] panel...")
+	screwdriver.play_tool_sound(src, 100)
+	if(screwdriver.use_tool(src, user, 1 SECONDS))
+		if(active || activating)
+			balloon_alert(user, "deactivate suit first!")
+		screwdriver.play_tool_sound(src, 100)
+		balloon_alert(user, "panel [open ? "closed" : "opened"]")
+		open = !open
+	else
+		balloon_alert(user, "interrupted!")
+	return TRUE
+
+/obj/item/mod/control/crowbar_act(mob/living/user, obj/item/crowbar)
+	. = ..()
+	if(!open)
+		balloon_alert(user, "open the panel first!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return FALSE
+	if(!allowed(user))
+		balloon_alert(user, "insufficient access!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return
+	if(length(modules))
+		var/list/removable_modules = list()
+		for(var/obj/item/mod/module/module as anything in modules)
+			if(!module.removable)
+				continue
+			removable_modules += module
+		var/obj/item/mod/module/module_to_remove = tgui_input_list(user, "Which module to remove?", "Module Removal", removable_modules)
+		if(!module_to_remove?.mod)
+			return FALSE
+		uninstall(module_to_remove)
+		module_to_remove.forceMove(drop_location())
+		crowbar.play_tool_sound(src, 100)
+		return TRUE
+	balloon_alert(user, "no modules!")
+	playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+	return FALSE
+
+/obj/item/mod/control/attackby(obj/item/attacking_item, mob/living/user, params)
+	if(istype(attacking_item, /obj/item/paicard))
+		if(!open) //mod must be open
+			balloon_alert(user, "suit must be open to transfer!")
+			return FALSE
+		insert_pai(user, attacking_item)
+		return TRUE
+	if(istype(attacking_item, /obj/item/mod/module))
+		if(!open)
+			balloon_alert(user, "open the panel first!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+			return FALSE
+		install(attacking_item, user)
+		return TRUE
+	else if(istype(attacking_item, /obj/item/stock_parts/cell))
+		if(!open)
+			balloon_alert(user, "open the panel first!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+			return FALSE
+		if(cell)
+			balloon_alert(user, "cell already installed!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+			return FALSE
+		attacking_item.forceMove(src)
+		cell = attacking_item
+		balloon_alert(user, "cell installed")
+		playsound(src, 'sound/machines/click.ogg', 50, TRUE, SILENCED_SOUND_EXTRARANGE)
+		update_cell_alert()
+		return TRUE
+	else if(is_wire_tool(attacking_item) && open)
+		wires.interact(user)
+		return TRUE
+	else if(open && attacking_item.GetID())
+		update_access(user, attacking_item)
+		return TRUE
+	return ..()
+
+/obj/item/mod/control/get_cell()
+	if(open)
+		return cell
+
+/obj/item/mod/control/emp_act(severity)
+	. = ..()
+	to_chat(wearer, span_notice("[severity > 1 ? "Light" : "Strong"] electromagnetic pulse detected!"))
+	if(!active || !wearer || . & EMP_PROTECT_CONTENTS)
+		return
+	selected_module = null
+	wearer.apply_damage(10 / severity, BURN, spread_damage=TRUE)
+	to_chat(wearer, span_danger("You feel [src] heat up from the EMP, burning you slightly."))
+	if (wearer.stat < UNCONSCIOUS && prob(10))
+		wearer.emote("scream")
+
+/obj/item/mod/control/on_outfit_equip(mob/living/carbon/human/outfit_wearer, visuals_only, item_slot)
+	if(visuals_only)
+		set_wearer(outfit_wearer) //we need to set wearer manually since it doesnt call equipped
+	quick_activation()
+
+/obj/item/mod/control/doStrip(mob/stripper, mob/owner)
+	if(active && !toggle_activate(stripper, force_deactivate = TRUE))
+		return
+	for(var/obj/item/part in mod_parts)
+		conceal(null, part)
+	return ..()
+
+/obj/item/mod/control/worn_overlays(isinhands = FALSE, icon_file)
+	. = ..()
+	if(!active)
+		return
+	for(var/obj/item/mod/module/module as anything in modules)
+		var/list/module_icons = module.generate_worn_overlay()
+		if(!length(module_icons))
+			continue
+		. += module_icons
+
+/obj/item/mod/control/proc/set_wearer(mob/user)
+	wearer = user
+	RegisterSignal(wearer, COMSIG_ATOM_EXITED, .proc/on_exit)
+	RegisterSignal(wearer, COMSIG_PROCESS_BORGCHARGER_OCCUPANT, .proc/on_borg_charge)
+	update_cell_alert()
+	for(var/obj/item/mod/module/module as anything in modules)
+		module.on_equip()
+
+/obj/item/mod/control/proc/unset_wearer()
+	for(var/obj/item/mod/module/module as anything in modules)
+		module.on_unequip()
+	UnregisterSignal(wearer, list(COMSIG_ATOM_EXITED, COMSIG_PROCESS_BORGCHARGER_OCCUPANT))
+	wearer.clear_alert("mod_charge")
+	wearer = null
+
+/obj/item/mod/control/proc/update_flags()
+	var/list/used_skin = theme.skins[skin]
+	for(var/obj/item/clothing/part as anything in mod_parts)
+		var/used_category
+		if(part == helmet)
+			used_category = HELMET_FLAGS
+			helmet.alternate_worn_layer = used_skin["HELMET_LAYER"]
+			helmet.alternate_layer = used_skin["HELMET_LAYER"]
+		if(part == chestplate)
+			used_category = CHESTPLATE_FLAGS
+		if(part == gauntlets)
+			used_category = GAUNTLETS_FLAGS
+		if(part == boots)
+			used_category = BOOTS_FLAGS
+		var/list/category = used_skin[used_category]
+		part.clothing_flags = category[UNSEALED_CLOTHING] || NONE
+		part.visor_flags = category[SEALED_CLOTHING] || NONE
+		part.flags_inv = category[UNSEALED_INVISIBILITY] || NONE
+		part.visor_flags_inv = category[SEALED_INVISIBILITY] || NONE
+		part.flags_cover = category[UNSEALED_COVER] || NONE
+		part.visor_flags_cover = category[SEALED_COVER] || NONE
+
+/obj/item/mod/control/proc/quick_module(mob/user)
+	if(!length(modules))
+		return
+	var/list/display_names = list()
+	var/list/items = list()
+	for(var/obj/item/mod/module/module as anything in modules)
+		if(module.module_type == MODULE_PASSIVE)
+			continue
+		display_names[module.name] = REF(module)
+		var/image/module_image = image(icon = module.icon, icon_state = module.icon_state)
+		items += list(module.name = module_image)
+	if(!length(items))
+		return
+	var/pick = show_radial_menu(user, src, items, custom_check = FALSE, require_near = TRUE)
+	if(!pick)
+		return
+	var/module_reference = display_names[pick]
+	var/obj/item/mod/module/selected_module = locate(module_reference) in modules
+	if(!istype(selected_module) || user.incapacitated())
+		return
+	selected_module.on_select()
+
+/obj/item/mod/control/proc/set_mod_color(new_color)
+	var/list/all_parts = mod_parts + src
+	for(var/obj/item/part as anything in all_parts)
+		part.remove_atom_colour(WASHABLE_COLOUR_PRIORITY)
+		part.add_atom_colour(new_color, FIXED_COLOUR_PRIORITY)
+	wearer?.regenerate_icons()
+
+/obj/item/mod/control/proc/set_mod_skin(new_skin)
+	if(active)
+		CRASH("[src] tried to set skin while active!")
+	skin = new_skin
+	var/list/used_skin = theme.skins[new_skin]
+	if(used_skin[CONTROL_LAYER])
+		alternate_worn_layer = used_skin[CONTROL_LAYER]
+	var/list/skin_updating = mod_parts.Copy() + src
+	for(var/obj/item/piece as anything in skin_updating)
+		piece.icon_state = "[skin]-[initial(piece.icon_state)]"
+	update_flags()
+	wearer?.regenerate_icons()
+
+/obj/item/mod/control/proc/shock(mob/living/user)
+	if(!istype(user) || cell?.charge < 1)
+		return FALSE
+	do_sparks(5, TRUE, src)
+	var/check_range = TRUE
+	return electrocute_mob(user, cell, src, 0.7, check_range)
+
+/obj/item/mod/control/proc/install(module, mob/user)
+	var/obj/item/mod/module/new_module = module
+	for(var/obj/item/mod/module/old_module as anything in modules)
+		if(is_type_in_list(new_module, old_module.incompatible_modules) || is_type_in_list(old_module, new_module.incompatible_modules))
+			if(user)
+				balloon_alert(user, "[new_module] incompatible with [old_module]!")
+				playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+			return
+	if(is_type_in_list(module, theme.module_blacklist))
+		if(user)
+			balloon_alert(user, "[src] doesn't accept [new_module]!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return
+	var/complexity_with_module = complexity
+	complexity_with_module += new_module.complexity
+	if(complexity_with_module > complexity_max)
+		if(user)
+			balloon_alert(user, "[new_module] would make [src] too complex!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return
+	new_module.forceMove(src)
+	modules += new_module
+	complexity += new_module.complexity
+	new_module.mod = src
+	new_module.on_install()
+	if(wearer)
+		new_module.on_equip()
+	if(user)
+		balloon_alert(user, "[new_module] added")
+		playsound(src, 'sound/machines/click.ogg', 50, TRUE, SILENCED_SOUND_EXTRARANGE)
+
+/obj/item/mod/control/proc/uninstall(module)
+	var/obj/item/mod/module/old_module = module
+	modules -= old_module
+	complexity -= old_module.complexity
+	if(active)
+		old_module.on_suit_deactivation()
+		if(old_module.active)
+			old_module.on_deactivation()
+	if(wearer)
+		old_module.on_unequip()
+	old_module.on_uninstall()
+	old_module.mod = null
+
+/obj/item/mod/control/proc/update_access(mob/user, obj/item/card/id/card)
+	if(!allowed(user))
+		balloon_alert(user, "insufficient access!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return
+	req_access = card.access.Copy()
+	balloon_alert(user, "access updated")
+
+/obj/item/mod/control/proc/update_cell_alert()
+	if(!wearer)
+		return
+	if(!cell)
+		wearer.throw_alert("mod_charge", /atom/movable/screen/alert/nocell)
+		return
+	var/remaining_cell = cell.charge/cell.maxcharge
+	switch(remaining_cell)
+		if(0.75 to INFINITY)
+			wearer.clear_alert("mod_charge")
+		if(0.5 to 0.75)
+			wearer.throw_alert("mod_charge", /atom/movable/screen/alert/lowcell, 1)
+		if(0.25 to 0.5)
+			wearer.throw_alert("mod_charge", /atom/movable/screen/alert/lowcell, 2)
+		if(0.01 to 0.25)
+			wearer.throw_alert("mod_charge", /atom/movable/screen/alert/lowcell, 3)
+		else
+			wearer.throw_alert("mod_charge", /atom/movable/screen/alert/emptycell)
+
+/obj/item/mod/control/proc/power_off()
+	balloon_alert(wearer, "no power!")
+	toggle_activate(wearer, force_deactivate = TRUE)
+
+/obj/item/mod/control/proc/on_exit(datum/source, atom/movable/part, direction)
+	SIGNAL_HANDLER
+
+	if(part.loc == src)
+		return
+	if(part == cell)
+		cell = null
+		update_cell_alert()
+		return
+	if(part.loc == wearer)
+		return
+	if(modules.Find(part))
+		uninstall(part)
+		return
+	if(mod_parts.Find(part))
+		conceal(wearer, part)
+		if(active)
+			INVOKE_ASYNC(src, .proc/toggle_activate, wearer, TRUE)
+		return
+
+/obj/item/mod/control/proc/on_borg_charge(datum/source, amount)
+	SIGNAL_HANDLER
+
+	if(!cell)
+		return
+	cell.give(amount)

code/modules/mod/mod_paint.dm

@@ -0,0 +1,207 @@
+#define MODPAINT_MAX_COLOR_VALUE 1.25
+#define MODPAINT_MIN_COLOR_VALUE 0
+#define MODPAINT_MAX_SECTION_COLORS 2
+#define MODPAINT_MIN_SECTION_COLORS 0.25
+#define MODPAINT_MAX_OVERALL_COLORS 4
+#define MODPAINT_MIN_OVERALL_COLORS 1.5
+#define MODPAINT_MODE_RESKIN "reskin"
+#define MODPAINT_MODE_REPAINT "repaint"
+
+/obj/item/mod/paint
+	name = "MOD paint kit"
+	desc = "This kit will repaint your MODsuit to something unique."
+	icon = 'icons/obj/clothing/modsuit/mod_construction.dmi'
+	icon_state = "paintkit"
+	var/obj/item/mod/control/editing_mod
+	var/atom/movable/screen/map_view/proxy_view
+	var/list/current_color
+	var/mode = MODPAINT_MODE_RESKIN
+
+/obj/item/mod/paint/Initialize(mapload)
+	. = ..()
+	current_color = color_matrix_identity()
+
+/obj/item/mod/paint/examine(mob/user)
+	. = ..()
+	. += span_notice("It is currently on [mode] mode.")
+
+/obj/item/mod/paint/attack_self(mob/user)
+	switch(mode)
+		if(MODPAINT_MODE_RESKIN)
+			mode = MODPAINT_MODE_REPAINT
+		if(MODPAINT_MODE_REPAINT)
+			mode = MODPAINT_MODE_RESKIN
+	to_chat(user, span_notice("Switched to [mode] mode."))
+
+/obj/item/mod/paint/pre_attack(atom/attacked_atom, mob/living/user, params)
+	if(!istype(attacked_atom, /obj/item/mod/control))
+		return ..()
+	var/obj/item/mod/control/mod = attacked_atom
+	if(mod.active || mod.activating)
+		balloon_alert(user, "suit is active!")
+		return STOP_ATTACK_PROC_CHAIN
+	switch(mode)
+		if(MODPAINT_MODE_RESKIN)
+			paint_skin(mod, user)
+		if(MODPAINT_MODE_REPAINT)
+			if(editing_mod)
+				return STOP_ATTACK_PROC_CHAIN
+			editing_mod = mod
+			var/map_name = "color_matrix_proxy_[REF(user.client)]"
+			proxy_view = new()
+			proxy_view.name = "screen"
+			proxy_view.assigned_map = map_name
+			proxy_view.del_on_map_removal = FALSE
+			proxy_view.screen_loc = "[map_name]:1,1"
+
+			proxy_view.appearance = editing_mod.appearance
+			proxy_view.color = null
+			user.client.register_map_obj(proxy_view)
+			ui_interact(user)
+			return STOP_ATTACK_PROC_CHAIN
+
+/obj/item/mod/paint/ui_interact(mob/user, datum/tgui/ui)
+	if(!editing_mod)
+		return
+	ui = SStgui.try_update_ui(user, src, ui)
+	if(!ui)
+		ui = new(user, src, "MODpaint", name)
+		ui.open()
+
+/obj/item/mod/paint/ui_host()
+	return editing_mod
+
+/obj/item/mod/paint/ui_close(mob/user)
+	. = ..()
+	editing_mod = null
+	QDEL_NULL(proxy_view)
+	current_color = color_matrix_identity()
+
+/obj/item/mod/paint/ui_status(mob/user)
+	if(check_menu(editing_mod, user))
+		return ..()
+	return UI_CLOSE
+
+/obj/item/mod/paint/ui_static_data(mob/user)
+	var/list/data = list()
+	data["mapRef"] = proxy_view.assigned_map
+	return data
+
+/obj/item/mod/paint/ui_data(mob/user)
+	var/list/data = list()
+	data["currentColor"] = current_color
+	return data
+
+/obj/item/mod/paint/ui_act(action, list/params)
+	. = ..()
+	if(.)
+		return
+	switch(action)
+		if("transition_color")
+			current_color = params["color"]
+			animate(proxy_view, time = 0.5 SECONDS, color = current_color)
+		if("confirm")
+			if(length(current_color) != 20) //20 is the length of a matrix identity list
+				return
+			for(var/color_value in current_color)
+				if(isnum(color_value))
+					continue
+				return
+			var/total_color_value = 0
+			var/list/total_colors = current_color.Copy()
+			total_colors.Cut(13, length(total_colors)) // 13 to 20 are just a and c, dont want to count them
+			var/red_value = current_color[1] + current_color[5] + current_color[9] //rr + gr + br
+			var/green_value = current_color[2] + current_color[6] + current_color[10] //rg + gg + bg
+			var/blue_value = current_color[3] + current_color[7] + current_color[11] //rb + gb + bb
+			if(red_value > MODPAINT_MAX_SECTION_COLORS)
+				balloon_alert(usr, "total red too high! ([red_value*100]%/[MODPAINT_MAX_SECTION_COLORS*100]%)")
+				return
+			else if(red_value < MODPAINT_MIN_SECTION_COLORS)
+				balloon_alert(usr, "total red too low! ([red_value*100]%/[MODPAINT_MIN_SECTION_COLORS*100]%)")
+				return
+			if(green_value > MODPAINT_MAX_SECTION_COLORS)
+				balloon_alert(usr, "total green too high! ([green_value*100]%/[MODPAINT_MAX_SECTION_COLORS*100]%)")
+				return
+			else if(green_value < MODPAINT_MIN_SECTION_COLORS)
+				balloon_alert(usr, "total green too low! ([green_value*100]%/[MODPAINT_MIN_SECTION_COLORS*100]%)")
+				return
+			if(blue_value > MODPAINT_MAX_SECTION_COLORS)
+				balloon_alert(usr, "total blue too high! ([blue_value*100]%/[MODPAINT_MAX_SECTION_COLORS*100]%)")
+				return
+			else if(blue_value < MODPAINT_MIN_SECTION_COLORS)
+				balloon_alert(usr, "total blue too low! ([blue_value*100]%/[MODPAINT_MIN_SECTION_COLORS*100]%)")
+				return
+			for(var/color_value in total_colors)
+				total_color_value += color_value
+				if(color_value > MODPAINT_MAX_COLOR_VALUE)
+					balloon_alert(usr, "one of colors too high! ([color_value*100]%/[MODPAINT_MAX_COLOR_VALUE*100]%")
+					return
+				else if(color_value < MODPAINT_MIN_COLOR_VALUE)
+					balloon_alert(usr, "one of colors too low! ([color_value*100]%/[MODPAINT_MIN_COLOR_VALUE*100]%")
+					return
+			if(total_color_value > MODPAINT_MAX_OVERALL_COLORS)
+				balloon_alert(usr, "total colors too high! ([total_color_value*100]%/[MODPAINT_MAX_OVERALL_COLORS*100]%)")
+				return
+			else if(total_color_value < MODPAINT_MIN_OVERALL_COLORS)
+				balloon_alert(usr, "total colors too low! ([total_color_value*100]%/[MODPAINT_MIN_OVERALL_COLORS*100]%)")
+				return
+			editing_mod.set_mod_color(current_color)
+			SStgui.close_uis(src)
+
+/obj/item/mod/paint/proc/paint_skin(obj/item/mod/control/mod, mob/user)
+	if(length(mod.theme.skins) <= 1)
+		balloon_alert(user, "no alternate skins!")
+		return
+	var/list/skins = list()
+	for(var/mod_skin in mod.theme.skins)
+		skins[mod_skin] = image(icon = mod.icon, icon_state = "[mod_skin]-control")
+	var/pick = show_radial_menu(user, mod, skins, custom_check = CALLBACK(src, .proc/check_menu, mod, user), require_near = TRUE)
+	if(!pick)
+		balloon_alert(user, "no skin picked!")
+		return
+	mod.set_mod_skin(pick)
+
+/obj/item/mod/paint/proc/check_menu(obj/item/mod/control/mod, mob/user)
+	if(user.incapacitated() || !user.is_holding(src) || !mod || mod.active || mod.activating)
+		return FALSE
+	return TRUE
+
+#undef MODPAINT_MAX_COLOR_VALUE
+#undef MODPAINT_MIN_COLOR_VALUE
+#undef MODPAINT_MAX_SECTION_COLORS
+#undef MODPAINT_MIN_SECTION_COLORS
+#undef MODPAINT_MAX_OVERALL_COLORS
+#undef MODPAINT_MIN_OVERALL_COLORS
+#undef MODPAINT_MODE_RESKIN
+#undef MODPAINT_MODE_REPAINT
+
+/obj/item/mod/skin_applier
+	name = "MOD skin applier"
+	desc = "This one-use skin applier will add a skin to MODsuits of a specific type."
+	icon = 'icons/obj/clothing/modsuit/mod_construction.dmi'
+	icon_state = "skinapplier"
+	var/skin = "civilian"
+	var/compatible_theme = /datum/mod_theme
+
+/obj/item/mod/skin_applier/Initialize(mapload)
+	. = ..()
+	name = "MOD [skin] skin applier"
+
+/obj/item/mod/skin_applier/pre_attack(atom/attacked_atom, mob/living/user, params)
+	if(!istype(attacked_atom, /obj/item/mod/control))
+		return ..()
+	var/obj/item/mod/control/mod = attacked_atom
+	if(mod.active || mod.activating)
+		balloon_alert(user, "suit is active!")
+		return TRUE
+	if(!istype(mod.theme, compatible_theme))
+		balloon_alert(user, "incompatible theme!")
+		return TRUE
+	mod.set_mod_skin(skin)
+	balloon_alert(user, "skin applied")
+	qdel(src)
+	return TRUE
+
+/obj/item/mod/skin_applier/honkerative
+	skin = "honkerative"
+	compatible_theme = /datum/mod_theme/syndicate

code/modules/mod/mod_theme.dm

@@ -0,0 +1,854 @@
+/// Global proc that sets up all MOD themes as singletons in a list and returns it.
+/proc/setup_mod_themes()
+	. = list()
+	for(var/path in typesof(/datum/mod_theme))
+		var/datum/mod_theme/new_theme = new path()
+		.[path] = new_theme
+
+/// MODsuit theme, instanced once and then used by MODsuits to grab various statistics.
+/datum/mod_theme
+	/// Theme name for the MOD.
+	var/name = "standard"
+	/// Description added to the MOD.
+	var/desc = "A civilian class suit by Nakamura Engineering, doesn't offer much other than slightly quicker movement."
+	/// Default skin of the MOD.
+	var/default_skin = "standard"
+	/// Armor shared across the MOD pieces.
+	var/armor = list(MELEE = 10, BULLET = 5, LASER = 5, ENERGY = 5, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 5, RAD = 0)
+	/// Resistance flags shared across the MOD pieces.
+	var/resistance_flags = NONE
+	/// Max heat protection shared across the MOD pieces.
+	var/max_heat_protection_temperature = SPACE_SUIT_MAX_TEMP_PROTECT
+	/// Max cold protection shared across the MOD pieces.
+	var/min_cold_protection_temperature = SPACE_SUIT_MIN_TEMP_PROTECT
+	/// Permeability shared across the MOD pieces.
+	var/permeability_coefficient = 0.01
+	/// Siemens shared across the MOD pieces.
+	var/siemens_coefficient = 0.5
+	/// How much modules can the MOD carry without malfunctioning.
+	var/complexity_max = DEFAULT_MAX_COMPLEXITY
+	/// How much battery power the MOD uses by just being on
+	var/cell_drain = DEFAULT_CHARGE_DRAIN
+	/// Slowdown of the MOD when not active.
+	var/slowdown_inactive = 1.25
+	/// Slowdown of the MOD when active.
+	var/slowdown_active = 0.75
+	/// Theme used by the MOD TGUI.
+	var/ui_theme = "ntos"
+	/// List of inbuilt modules. These are different from the pre-equipped suits, you should mainly use these for unremovable modules with 0 complexity.
+	var/list/inbuilt_modules = list()
+	/// Modules blacklisted from the MOD.
+	var/list/module_blacklist = list()
+	/// List of skins with their appropriate clothing flags.
+	var/list/skins = list(
+		"standard" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+		"civilian" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/engineering
+	name = "engineering"
+	desc = "An engineer-fit suit with heat and shock resistance. Nakamura Engineering's classic."
+	default_skin = "engineering"
+	armor = list(MELEE = 10, BULLET = 5, LASER = 20, ENERGY = 10, BOMB = 10, BIO = 100, FIRE = 100, ACID = 25, WOUND = 10, RAD = 20)
+	resistance_flags = FIRE_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	slowdown_inactive = 1.5
+	slowdown_active = 1
+	skins = list(
+		"engineering" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/atmospheric
+	name = "atmospheric"
+	desc = "An atmospheric-resistant suit by Nakamura Engineering, offering extreme heat resistance compared to the engineer suit."
+	default_skin = "atmospheric"
+	armor = list(MELEE = 10, BULLET = 5, LASER = 10, ENERGY = 15, BOMB = 10, BIO = 100, FIRE = 100, ACID = 75, WOUND = 10, RAD = 0)
+	resistance_flags = FIRE_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	slowdown_inactive = 1.5
+	slowdown_active = 1
+	skins = list(
+		"atmospheric" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR,
+				UNSEALED_COVER = HEADCOVERSMOUTH,
+				SEALED_COVER = HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/advanced
+	name = "advanced"
+	desc = "An advanced version of Nakamura Engineering's classic suit, shining with a white, acid and fire resistant polish."
+	default_skin = "advanced"
+	armor = list(MELEE = 15, BULLET = 5, LASER = 20, ENERGY = 15, BOMB = 50, BIO = 100, FIRE = 100, ACID = 90, WOUND = 10, RAD = 35)
+	resistance_flags = FIRE_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	slowdown_inactive = 1
+	slowdown_active = 0.5
+	inbuilt_modules = list(/obj/item/mod/module/magboot/advanced)
+	skins = list(
+		"advanced" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/mining
+	name = "mining"
+	desc = "A high-power Nanotrasen mining suit, supporting more complexity at a bigger drain."
+	default_skin = "mining"
+	armor = list(MELEE = 15, BULLET = 5, LASER = 5, ENERGY = 5, BOMB = 30, BIO = 100, FIRE = 100, ACID = 75, WOUND = 15, RAD = 0)
+	resistance_flags = FIRE_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	cell_drain = DEFAULT_CHARGE_DRAIN * 2
+	complexity_max = DEFAULT_MAX_COMPLEXITY + 5
+	skins = list(
+		"mining" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEYES|HIDEFACE,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/medical
+	name = "medical"
+	desc = "A lightweight suit by DeForest Medical Corporation, allows for easier movement."
+	default_skin = "medical"
+	armor = list(MELEE = 5, BULLET = 5, LASER = 5, ENERGY = 5, BOMB = 10, BIO = 100, FIRE = 60, ACID = 75, WOUND = 5, RAD = 0)
+	cell_drain = DEFAULT_CHARGE_DRAIN * 1.5
+	slowdown_inactive = 1
+	slowdown_active = 0.5
+	skins = list(
+		"medical" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+		"corpsman" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/rescue
+	name = "rescue"
+	desc = "An advanced version of DeForest Medical Corporation's medical suit, designed for quick rescue of bodies from the most dangerous environments."
+	default_skin = "rescue"
+	armor = list(MELEE = 10, BULLET = 10, LASER = 5, ENERGY = 5, BOMB = 10, BIO = 100, FIRE = 100, ACID = 100, WOUND = 5, RAD = 0)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	cell_drain = DEFAULT_CHARGE_DRAIN * 1.5
+	slowdown_inactive = 0.75
+	slowdown_active = 0.25
+	inbuilt_modules = list(/obj/item/mod/module/quick_carry/advanced)
+	skins = list(
+		"rescue" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/research
+	name = "research"
+	desc = "A private military EOD suit by Aussec Armory, intended for explosive research. Bulky, but expansive."
+	default_skin = "research"
+	armor = list(MELEE = 20, BULLET = 15, LASER = 5, ENERGY = 5, BOMB = 100, BIO = 100, FIRE = 100, ACID = 100, WOUND = 15, RAD = 0)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	complexity_max = DEFAULT_MAX_COMPLEXITY + 5
+	slowdown_inactive = 2
+	slowdown_active = 1.5
+	inbuilt_modules = list(/obj/item/mod/module/reagent_scanner/advanced)
+	skins = list(
+		"research" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/security
+	name = "security"
+	desc = "An Apadyne Technologies security suit, offering shock protection and quicker speed, at the cost of carrying capacity."
+	default_skin = "security"
+	armor = list(MELEE = 15, BULLET = 15, LASER = 15, ENERGY = 15, BOMB = 25, BIO = 100, FIRE = 75, ACID = 75, WOUND = 15, RAD = 0)
+	siemens_coefficient = 0
+	complexity_max = DEFAULT_MAX_COMPLEXITY - 5
+	slowdown_inactive = 1
+	slowdown_active = 0.5
+	skins = list(
+		"security" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEYES|HIDEFACE,
+				UNSEALED_COVER = HEADCOVERSMOUTH,
+				SEALED_COVER = HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/safeguard
+	name = "safeguard"
+	desc = "An Apadyne Technologies advanced security suit, offering greater speed and fire protection than the standard security model."
+	default_skin = "safeguard"
+	armor = list(MELEE = 15, BULLET = 15, LASER = 15, ENERGY = 15, BOMB = 40, BIO = 100, FIRE = 100, ACID = 95, WOUND = 15, RAD = 0)
+	resistance_flags = FIRE_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	complexity_max = DEFAULT_MAX_COMPLEXITY - 5
+	slowdown_inactive = 0.75
+	slowdown_active = 0.25
+	skins = list(
+		"safeguard" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/magnate
+	name = "magnate"
+	desc = "A fancy, very protective suit for Nanotrasen's captains. Shock, fire and acid-proof while also having a large capacity and high speed."
+	default_skin = "magnate"
+	armor = list(MELEE = 20, BULLET = 15, LASER = 15, ENERGY = 15, BOMB = 50, BIO = 100, FIRE = 100, ACID = 100, WOUND = 15, RAD = 0)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	complexity_max = DEFAULT_MAX_COMPLEXITY + 5
+	slowdown_inactive = 0.75
+	slowdown_active = 0.25
+	skins = list(
+		"magnate" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/cosmohonk
+	name = "cosmohonk"
+	desc = "A suit by Honk Ltd. Protects against low humor environments. Most of the tech went to lower the power cost."
+	default_skin = "cosmohonk"
+	armor = list(MELEE = 5, BULLET = 5, LASER = 20, ENERGY = 20, BOMB = 10, BIO = 100, FIRE = 60, ACID = 30, WOUND = 5, RAD = 0)
+	cell_drain = DEFAULT_CHARGE_DRAIN * 0.25
+	slowdown_inactive = 1.75
+	slowdown_active = 1.25
+	skins = list(
+		"cosmohonk" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEEARS|HIDEHAIR,
+				SEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEYES|HIDEFACE|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/syndicate
+	name = "syndicate"
+	desc = "A suit designed by Gorlex Marauders, offering armor ruled illegal in most of Spinward Stellar."
+	default_skin = "syndicate"
+	armor = list(MELEE = 15, BULLET = 20, LASER = 15, ENERGY = 15, BOMB = 35, BIO = 100, FIRE = 50, ACID = 90, WOUND = 25, RAD = 0)
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	slowdown_inactive = 1
+	slowdown_active = 0.5
+	ui_theme = "syndicate"
+	inbuilt_modules = list()
+	skins = list(
+		"syndicate" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/elite
+	name = "elite"
+	desc = "An elite suit upgraded by Cybersun Industries, offering upgraded armor values."
+	default_skin = "elite"
+	armor = list(MELEE = 35, BULLET = 30, LASER = 35, ENERGY = 35, BOMB = 55, BIO = 100, FIRE = 100, ACID = 100, WOUND = 25, RAD = 0)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	slowdown_inactive = 0.75
+	slowdown_active = 0.25
+	ui_theme = "syndicate"
+	inbuilt_modules = list()
+	skins = list(
+		"elite" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/enchanted
+	name = "enchanted"
+	desc = "The Wizard Federation's relatively low-tech MODsuit. Is very protective, though."
+	default_skin = "enchanted"
+	armor = list(MELEE = 40, BULLET = 40, LASER = 50, ENERGY = 50, BOMB = 35, BIO = 100, FIRE = 100, ACID = 100, WOUND = 30, RAD = 0)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	complexity_max = DEFAULT_MAX_COMPLEXITY - 5
+	slowdown_inactive = 0.75
+	slowdown_active = 0.25
+	ui_theme = "wizard"
+	inbuilt_modules = list(/obj/item/mod/module/anti_magic/wizard)
+	skins = list(
+		"enchanted" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/prototype
+	name = "prototype"
+	desc = "A prototype modular suit powered by locomotives. While it is comfortable and has a big capacity, it remains very bulky and power-inefficient."
+	default_skin = "prototype"
+	armor = list(MELEE = 20, BULLET = 5, LASER = 10, ENERGY = 10, BOMB = 50, BIO = 100, FIRE = 100, ACID = 75, WOUND = 5, RAD = 0)
+	resistance_flags = FIRE_PROOF
+	complexity_max = DEFAULT_MAX_COMPLEXITY + 10
+	slowdown_inactive = 2.5
+	slowdown_active = 2
+	ui_theme = "hackerman"
+	inbuilt_modules = list(/obj/item/mod/module/kinesis)
+	skins = list(
+		"prototype" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/responsory
+	name = "responsory"
+	desc = "A high-speed rescue suit by Nanotrasen, intended for its' emergency response teams."
+	default_skin = "responsory"
+	armor = list(MELEE = 50, BULLET = 40, LASER = 50, ENERGY = 50, BOMB = 50, BIO = 100, FIRE = 100, ACID = 90, WOUND = 10, RAD = 0)
+	resistance_flags = FIRE_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	slowdown_inactive = 0.5
+	slowdown_active = 0
+	skins = list(
+		"responsory" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = NONE,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+		"inquisitory" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/apocryphal
+	name = "apocryphal"
+	desc = "A high-tech, only technically legal, armored suit created by a collaboration effort between Nanotrasen and Apadyne Technologies."
+	default_skin = "apocryphal"
+	armor = list(MELEE = 80, BULLET = 80, LASER = 50, ENERGY = 60, BOMB = 100, BIO = 100, FIRE = 100, ACID = 100, WOUND = 25, RAD = 0)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	complexity_max = DEFAULT_MAX_COMPLEXITY + 10
+	skins = list(
+		"apocryphal" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEEARS|HIDEHAIR,
+				SEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEYES|HIDEFACE|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/corporate
+	name = "corporate"
+	desc = "A fancy, high-tech suit for Nanotrasen's high ranking officers."
+	default_skin = "corporate"
+	armor = list(MELEE = 50, BULLET = 40, LASER = 50, ENERGY = 50, BOMB = 50, BIO = 100, FIRE = 100, ACID = 100, WOUND = 15, RAD = 0)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	siemens_coefficient = 0
+	slowdown_inactive = 0.5
+	slowdown_active = 0
+	skins = list(
+		"corporate" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEYES|HIDEFACE,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/debug
+	name = "debug"
+	desc = "Strangely nostalgic."
+	default_skin = "debug"
+	armor = list(MELEE = 50, BULLET = 50, LASER = 50, ENERGY = 50, BOMB = 100, BIO = 100, FIRE = 100, ACID = 100, WOUND = 0, RAD = 25)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	complexity_max = 50
+	slowdown_inactive = 0.5
+	slowdown_active = 0
+	skins = list(
+		"debug" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE,
+				UNSEALED_COVER = HEADCOVERSMOUTH,
+				SEALED_COVER = HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+			),
+		),
+	)
+
+/datum/mod_theme/administrative
+	name = "administrative"
+	desc = "A suit made of adminium. Who comes up with these stupid mineral names?"
+	default_skin = "debug"
+	armor = list(MELEE = 100, BULLET = 100, LASER = 100, ENERGY = 100, BOMB = 100, BIO = 100, FIRE = 100, ACID = 100, WOUND = 100, RAD = 100)
+	resistance_flags = INDESTRUCTIBLE|LAVA_PROOF|FIRE_PROOF|UNACIDABLE|ACID_PROOF
+	max_heat_protection_temperature = FIRE_IMMUNITY_MAX_TEMP_PROTECT
+	complexity_max = 1000
+	cell_drain = DEFAULT_CHARGE_DRAIN * 0
+	slowdown_inactive = 0
+	slowdown_active = 0
+	skins = list(
+		"debug" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				SEALED_INVISIBILITY = HIDEJUMPSUIT,
+			),
+			GAUNTLETS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+			),
+			BOOTS_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+			),
+		),
+	)

code/modules/mod/mod_types.dm

@@ -0,0 +1,273 @@
+/obj/item/mod/control/pre_equipped
+	cell = /obj/item/stock_parts/cell/high
+	var/applied_skin
+
+/obj/item/mod/control/pre_equipped/Initialize(mapload, new_theme, new_skin)
+	new_skin = applied_skin
+	return ..()
+
+/obj/item/mod/control/pre_equipped/standard
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/flashlight,
+	)
+
+/obj/item/mod/control/pre_equipped/engineering
+	theme = /datum/mod_theme/engineering
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/rad_protection,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/magboot,
+	)
+
+/obj/item/mod/control/pre_equipped/atmospheric
+	theme = /datum/mod_theme/atmospheric
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/rad_protection,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/t_ray,
+	)
+
+/obj/item/mod/control/pre_equipped/advanced
+	theme = /datum/mod_theme/advanced
+	cell = /obj/item/stock_parts/cell/super
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/rad_protection,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/jetpack,
+	)
+
+/obj/item/mod/control/pre_equipped/mining
+	theme = /datum/mod_theme/mining
+	cell = /obj/item/stock_parts/cell/high/plus
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/orebag,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/magboot,
+		/obj/item/mod/module/drill,
+	)
+
+/obj/item/mod/control/pre_equipped/medical
+	theme = /datum/mod_theme/medical
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/health_analyzer,
+		/obj/item/mod/module/quick_carry,
+	)
+
+/obj/item/mod/control/pre_equipped/rescue
+	theme = /datum/mod_theme/rescue
+	cell = /obj/item/stock_parts/cell/super
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/health_analyzer,
+	)
+
+/obj/item/mod/control/pre_equipped/research
+	theme = /datum/mod_theme/research
+	cell = /obj/item/stock_parts/cell/super
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/t_ray,
+	)
+
+/obj/item/mod/control/pre_equipped/security
+	theme = /datum/mod_theme/security
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/holster,
+	)
+
+/obj/item/mod/control/pre_equipped/safeguard
+	theme = /datum/mod_theme/safeguard
+	cell = /obj/item/stock_parts/cell/super
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/jetpack,
+		/obj/item/mod/module/holster,
+	)
+
+/obj/item/mod/control/pre_equipped/magnate
+	theme = /datum/mod_theme/magnate
+	cell = /obj/item/stock_parts/cell/hyper
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/holster,
+		/obj/item/mod/module/jetpack/advanced,
+	)
+
+/obj/item/mod/control/pre_equipped/traitor
+	theme = /datum/mod_theme/syndicate
+	cell = /obj/item/stock_parts/cell/super
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/dna_lock,
+		/obj/item/mod/module/jetpack,
+	)
+
+/obj/item/mod/control/pre_equipped/nuclear
+	theme = /datum/mod_theme/syndicate
+	cell = /obj/item/stock_parts/cell/hyper
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/visor/thermal,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/jetpack/advanced,
+		/obj/item/mod/module/holster,
+	)
+
+/obj/item/mod/control/pre_equipped/elite
+	theme = /datum/mod_theme/elite
+	cell = /obj/item/stock_parts/cell/bluespace
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/emp_shield,
+		/obj/item/mod/module/visor/thermal,
+		/obj/item/mod/module/jetpack/advanced,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/holster,
+	)
+
+/obj/item/mod/control/pre_equipped/prototype
+	theme = /datum/mod_theme/prototype
+	cell = /obj/item/stock_parts/cell/high/plus
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/rad_protection,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/tether,
+	)
+
+/obj/item/mod/control/pre_equipped/responsory
+	theme = /datum/mod_theme/responsory
+	cell = /obj/item/stock_parts/cell/hyper
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/emp_shield,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/holster,
+	)
+	var/insignia_type = /obj/item/mod/module/insignia
+
+/obj/item/mod/control/pre_equipped/responsory/Initialize(mapload, new_theme, new_skin)
+	initial_modules.Insert(1, insignia_type)
+	return ..()
+
+/obj/item/mod/control/pre_equipped/responsory/commander
+	insignia_type = /obj/item/mod/module/insignia/commander
+
+/obj/item/mod/control/pre_equipped/responsory/security
+	insignia_type = /obj/item/mod/module/insignia/security
+
+/obj/item/mod/control/pre_equipped/responsory/engineer
+	insignia_type = /obj/item/mod/module/insignia/engineer
+
+/obj/item/mod/control/pre_equipped/responsory/medic
+	insignia_type = /obj/item/mod/module/insignia/medic
+
+/obj/item/mod/control/pre_equipped/responsory/janitor
+	insignia_type = /obj/item/mod/module/insignia/janitor
+
+/obj/item/mod/control/pre_equipped/responsory/clown
+	insignia_type = /obj/item/mod/module/insignia/clown
+
+/obj/item/mod/control/pre_equipped/responsory/chaplain
+	insignia_type = /obj/item/mod/module/insignia/chaplain
+
+/obj/item/mod/control/pre_equipped/responsory/inquisitory
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/anti_magic,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/emp_shield,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/holster,
+	)
+	applied_skin = "inquisitory"
+
+/obj/item/mod/control/pre_equipped/responsory/inquisitory/commander
+	insignia_type = /obj/item/mod/module/insignia/commander
+
+/obj/item/mod/control/pre_equipped/responsory/inquisitory/security
+	insignia_type = /obj/item/mod/module/insignia/security
+
+/obj/item/mod/control/pre_equipped/responsory/inquisitory/medic
+	insignia_type = /obj/item/mod/module/insignia/medic
+
+/obj/item/mod/control/pre_equipped/responsory/inquisitory/chaplain
+	insignia_type = /obj/item/mod/module/insignia/chaplain
+
+/obj/item/mod/control/pre_equipped/apocryphal
+	theme = /datum/mod_theme/apocryphal
+	cell = /obj/item/stock_parts/cell/bluespace
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/emp_shield,
+		/obj/item/mod/module/holster,
+		/obj/item/mod/module/jetpack,
+	)
+
+/obj/item/mod/control/pre_equipped/corporate
+	theme = /datum/mod_theme/corporate
+	cell = /obj/item/stock_parts/cell/bluespace
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/holster,
+	)
+
+/obj/item/mod/control/pre_equipped/debug
+	theme = /datum/mod_theme/debug
+	cell = /obj/item/stock_parts/cell/bluespace
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/flashlight,
+		/obj/item/mod/module/bikehorn,
+		/obj/item/mod/module/rad_protection,
+		/obj/item/mod/module/tether,
+	) //one of every type of module, for testing if they all work correctly
+
+/obj/item/mod/control/pre_equipped/administrative
+	theme = /datum/mod_theme/administrative
+	cell = /obj/item/stock_parts/cell/infinite/abductor
+	initial_modules = list(
+		/obj/item/mod/module/storage,
+		/obj/item/mod/module/welding,
+		/obj/item/mod/module/quick_carry/advanced,
+		/obj/item/mod/module/magboot/advanced,
+		/obj/item/mod/module/jetpack/advanced,
+	)
+
+//these exist for the prefs menu
+/obj/item/mod/control/pre_equipped/syndicate_empty
+	theme = /datum/mod_theme/syndicate
+
+/obj/item/mod/control/pre_equipped/syndicate_empty/elite
+	theme = /datum/mod_theme/elite
+
+INITIALIZE_IMMEDIATE(/obj/item/mod/control/pre_equipped/syndicate_empty)

code/modules/mod/mod_ui.dm

@@ -0,0 +1,78 @@
+/obj/item/mod/control/ui_interact(mob/user, datum/tgui/ui)
+	ui = SStgui.try_update_ui(user, src, ui)
+	if(!ui)
+		ui = new(user, src, "MODsuit", name)
+		ui.open()
+
+/obj/item/mod/control/ui_data(mob/user)
+	var/data = list()
+	data["interface_break"] = interface_break
+	data["malfunctioning"] = malfunctioning
+	data["open"] = open
+	data["active"] = active
+	data["complexity"] = complexity
+	data["selected_module"] = selected_module?.name
+	data["wearer_name"] = wearer ? (wearer.get_authentification_name("Unknown") || "Unknown") : "No Occupant"
+	data["wearer_job"] = wearer ? wearer.get_assignment("Unknown", "Unknown", FALSE) : "No Job"
+	data["AI"] = ai?.name
+	data["is_pAI"] = ai ? ispAI(ai) : FALSE
+	data["is_user_AI"] = ai ? user == ai : FALSE
+	data["cell"] = cell?.name
+	data["charge"] = cell ? round(cell.percent(), 1) : 0
+	data["modules"] = list()
+	for(var/obj/item/mod/module/module as anything in modules)
+		var/list/module_data = list(
+			name = module.name,
+			description = module.desc,
+			module_type = module.module_type,
+			active = module.active,
+			idle_power = module.idle_power_cost,
+			active_power = module.active_power_cost,
+			use_power = module.use_power_cost,
+			complexity = module.complexity,
+			cooldown_time = module.cooldown_time,
+			cooldown = round(COOLDOWN_TIMELEFT(module, cooldown_timer), 1 SECONDS),
+			id = module.tgui_id,
+			ref = REF(module),
+			configuration_data = module.get_configuration()
+		)
+		module_data += module.add_ui_data()
+		data["modules"] += list(module_data)
+	return data
+
+/obj/item/mod/control/ui_static_data(mob/user)
+	var/data = list()
+	data["ui_theme"] = ui_theme
+	data["control"] = name
+	data["complexity_max"] = complexity_max
+	data["helmet"] = helmet?.name
+	data["chestplate"] = chestplate?.name
+	data["gauntlets"] = gauntlets?.name
+	data["boots"] = boots?.name
+	return data
+
+/obj/item/mod/control/ui_act(action, params)
+	. = ..()
+	if(.)
+		return
+	if(malfunctioning && prob(75))
+		balloon_alert(usr, "button malfunctions!")
+		return
+	switch(action)
+		if("activate")
+			toggle_activate(usr)
+		if("select")
+			var/obj/item/mod/module/module = locate(params["ref"]) in modules
+			if(!module)
+				return
+			module.on_select()
+		if("configure")
+			var/obj/item/mod/module/module = locate(params["ref"]) in modules
+			if(!module)
+				return
+			module.configure_edit(params["key"], params["value"])
+		if("remove_pai")
+			if(ishuman(usr)) // Only the MODsuit's wearer should be removing the pAI.
+				var/mob/user = usr
+				extract_pai(user)
+	return TRUE

code/modules/mod/modules/_module.dm

@@ -0,0 +1,357 @@
+/obj/item/mod/module
+	name = "MOD module"
+	icon = 'icons/obj/clothing/modsuit/mod_modules.dmi'
+	icon_state = "module"
+	/// If it can be removed
+	var/removable = TRUE
+	/// If it's passive, togglable, usable or active
+	var/module_type = MODULE_PASSIVE
+	/// Is the module active
+	var/active = FALSE
+	/// How much space it takes up in the MOD
+	var/complexity = 0
+	/// Power use when idle
+	var/idle_power_cost = DEFAULT_CHARGE_DRAIN * 0
+	/// Power use when active
+	var/active_power_cost = DEFAULT_CHARGE_DRAIN * 0
+	/// Power use when used, we call it manually
+	var/use_power_cost = DEFAULT_CHARGE_DRAIN * 0
+	/// ID used by their TGUI
+	var/tgui_id
+	/// Linked MODsuit
+	var/obj/item/mod/control/mod
+	/// If we're an active module, what item are we?
+	var/obj/item/device
+	/// Overlay given to the user when the module is inactive
+	var/overlay_state_inactive
+	/// Overlay given to the user when the module is active
+	var/overlay_state_active
+	/// Overlay given to the user when the module is used, lasts until cooldown finishes
+	var/overlay_state_use
+	/// Icon file for the overlay.
+	var/overlay_icon_file = 'icons/mob/clothing/modsuit/mod_modules.dmi'
+	/// Does the overlay use the control unit's colors?
+	var/use_mod_colors = FALSE
+	/// What modules are we incompatible with?
+	var/list/incompatible_modules = list()
+	/// Cooldown after use
+	var/cooldown_time = 0
+	/// The mouse button needed to use this module
+	var/used_signal
+	/// If we're allowed to use this module while phased out.
+	var/allowed_in_phaseout = FALSE
+	/// If we're allowed to use this module while the suit is disabled.
+	var/allowed_inactive = FALSE
+	/// Timer for the cooldown
+	COOLDOWN_DECLARE(cooldown_timer)
+
+/obj/item/mod/module/Initialize(mapload)
+	. = ..()
+	if(module_type != MODULE_ACTIVE)
+		return
+	if(ispath(device))
+		device = new device(src)
+		ADD_TRAIT(device, TRAIT_NODROP, MOD_TRAIT)
+		RegisterSignal(device, COMSIG_PARENT_PREQDELETED, .proc/on_device_deletion)
+		RegisterSignal(src, COMSIG_ATOM_EXITED, .proc/on_exit)
+
+/obj/item/mod/module/Destroy()
+	mod?.uninstall(src)
+	if(device)
+		UnregisterSignal(device, COMSIG_PARENT_PREQDELETED)
+		QDEL_NULL(device)
+	return ..()
+
+/obj/item/mod/module/examine(mob/user)
+	. = ..()
+	if(user.hud_list[DIAG_HUD] && user.client.images & user.hud_list[DIAG_HUD])
+		. += span_notice("Complexity level: [complexity]")
+
+/// Called from MODsuit's install() proc, so when the module is installed.
+/obj/item/mod/module/proc/on_install()
+	return
+
+/// Called from MODsuit's uninstall() proc, so when the module is uninstalled.
+/obj/item/mod/module/proc/on_uninstall()
+	return
+
+/// Called when the MODsuit is activated
+/obj/item/mod/module/proc/on_suit_activation()
+	return
+
+/// Called when the MODsuit is deactivated
+/obj/item/mod/module/proc/on_suit_deactivation()
+	return
+
+/// Called when the MODsuit is equipped
+/obj/item/mod/module/proc/on_equip()
+	return
+
+/// Called when the MODsuit is unequipped
+/obj/item/mod/module/proc/on_unequip()
+	return
+
+/// Called when the module is selected from the TGUI
+/obj/item/mod/module/proc/on_select()
+	if(((!mod.active || mod.activating) && !allowed_inactive) || module_type == MODULE_PASSIVE)
+		if(mod.wearer)
+			balloon_alert(mod.wearer, "not active!")
+		return
+	if(module_type != MODULE_USABLE)
+		if(active)
+			on_deactivation()
+		else
+			on_activation()
+	else
+		on_use()
+	SEND_SIGNAL(mod, COMSIG_MOD_MODULE_SELECTED, src)
+
+/// Called when the module is activated
+/obj/item/mod/module/proc/on_activation()
+	if(!COOLDOWN_FINISHED(src, cooldown_timer))
+		balloon_alert(mod.wearer, "on cooldown!")
+		return FALSE
+	if(!mod.active || mod.activating || !mod.cell?.charge)
+		balloon_alert(mod.wearer, "unpowered!")
+		return FALSE
+	if(!allowed_in_phaseout && istype(mod.wearer.loc, /obj/effect/dummy/phased_mob))
+		//specifically a to_chat because the user is phased out.
+		to_chat(mod.wearer, span_warning("You cannot activate this right now."))
+		return FALSE
+	if(module_type == MODULE_ACTIVE)
+		if(mod.selected_module && !mod.selected_module.on_deactivation())
+			return
+		mod.selected_module = src
+		if(device)
+			if(mod.wearer.put_in_hands(device))
+				balloon_alert(mod.wearer, "[device] extended")
+				RegisterSignal(mod.wearer, COMSIG_ATOM_EXITED, .proc/on_exit)
+			else
+				balloon_alert(mod.wearer, "can't extend [device]!")
+				return
+		else
+			update_signal()
+			balloon_alert(mod.wearer, "[src] activated, alt-click to use")
+	active = TRUE
+	mod.wearer.update_inv_back()
+	return TRUE
+
+/// Called when the module is deactivated
+/obj/item/mod/module/proc/on_deactivation()
+	active = FALSE
+	if(module_type == MODULE_ACTIVE)
+		mod.selected_module = null
+		if(device)
+			mod.wearer.transferItemToLoc(device, src, TRUE)
+			balloon_alert(mod.wearer, "[device] retracted")
+			UnregisterSignal(mod.wearer, COMSIG_ATOM_EXITED)
+		else
+			balloon_alert(mod.wearer, "[src] deactivated")
+			UnregisterSignal(mod.wearer, used_signal)
+			used_signal = null
+	mod.wearer.update_inv_back()
+	return TRUE
+
+/// Called when the module is used
+/obj/item/mod/module/proc/on_use()
+	if(!COOLDOWN_FINISHED(src, cooldown_timer))
+		return FALSE
+	if(!check_power(use_power_cost))
+		return FALSE
+	if(!allowed_in_phaseout && istype(mod.wearer.loc, /obj/effect/dummy/phased_mob))
+		//specifically a to_chat because the user is phased out.
+		to_chat(mod.wearer, span_warning("You cannot activate this right now."))
+		return FALSE
+	COOLDOWN_START(src, cooldown_timer, cooldown_time)
+	addtimer(CALLBACK(mod.wearer, /mob.proc/update_inv_back), cooldown_time)
+	mod.wearer.update_inv_back()
+	return TRUE
+
+/// Called when an activated module without a device is used
+/obj/item/mod/module/proc/on_select_use(atom/target)
+	if(mod.wearer.incapacitated(ignore_grab = TRUE))
+		return FALSE
+	mod.wearer.face_atom(target)
+	if(!on_use())
+		return FALSE
+	return TRUE
+
+/// Called when an activated module without a device is active and the user alt/middle-clicks
+/obj/item/mod/module/proc/on_special_click(mob/source, atom/target)
+	SIGNAL_HANDLER
+	on_select_use(target)
+	return COMSIG_MOB_CANCEL_CLICKON
+
+/// Called on the MODsuit's process
+/obj/item/mod/module/proc/on_process(delta_time)
+	if(active)
+		if(!drain_power(active_power_cost * delta_time))
+			on_deactivation()
+			return FALSE
+		on_active_process(delta_time)
+	else
+		drain_power(idle_power_cost * delta_time)
+	return TRUE
+
+/// Called on the MODsuit's process if it is an active module
+/obj/item/mod/module/proc/on_active_process(delta_time)
+	return
+
+/// Drains power from the suit cell
+/obj/item/mod/module/proc/drain_power(amount)
+	if(!check_power(amount))
+		return FALSE
+	mod.cell.charge = max(0, mod.cell.charge - amount)
+	return TRUE
+
+/obj/item/mod/module/proc/check_power(amount)
+	if(!mod.cell || (mod.cell.charge < amount))
+		return FALSE
+	return TRUE
+
+/// Adds additional things to the MODsuit ui_data()
+/obj/item/mod/module/proc/add_ui_data()
+	return list()
+
+/// Creates a list of configuring options for this module
+/obj/item/mod/module/proc/get_configuration()
+	return list()
+
+/// Generates an element of the get_configuration list with a display name, type and value
+/obj/item/mod/module/proc/add_ui_configuration(display_name, type, value, list/values)
+	return list("display_name" = display_name, "type" = type, "value" = value, "values" = values)
+
+/// Receives configure edits from the TGUI and edits the vars
+/obj/item/mod/module/proc/configure_edit(key, value)
+	return
+
+/// Called when the device moves to a different place on active modules
+/obj/item/mod/module/proc/on_exit(datum/source, atom/movable/part, direction)
+	SIGNAL_HANDLER
+
+	if(!active)
+		return
+	if(part.loc == src)
+		return
+	if(part.loc == mod.wearer)
+		return
+	if(part == device)
+		on_deactivation()
+
+/// Called when the device gets deleted on active modules
+/obj/item/mod/module/proc/on_device_deletion(datum/source)
+	SIGNAL_HANDLER
+
+	if(source == device)
+		device = null
+		qdel(src)
+
+/// Generates an icon to be used for the suit's worn overlays
+/obj/item/mod/module/proc/generate_worn_overlay()
+	. = list()
+	if(!mod.active)
+		return
+	var/used_overlay
+	if(overlay_state_use && !COOLDOWN_FINISHED(src, cooldown_timer))
+		used_overlay = overlay_state_use
+	else if(overlay_state_active && active)
+		used_overlay = overlay_state_active
+	else if(overlay_state_inactive)
+		used_overlay = overlay_state_inactive
+	else
+		return
+	var/mutable_appearance/module_icon = mutable_appearance(overlay_icon_file, used_overlay)
+	if(!use_mod_colors)
+		module_icon.appearance_flags |= RESET_COLOR
+	. += module_icon
+
+/// Updates the signal used by active modules to be activated
+/obj/item/mod/module/proc/update_signal()
+	mod.selected_module.used_signal = COMSIG_MOB_ALTCLICKON
+	RegisterSignal(mod.wearer, mod.selected_module.used_signal, /obj/item/mod/module.proc/on_special_click)
+
+/obj/item/mod/module/anomaly_locked
+	name = "MOD anomaly locked module"
+	desc = "A form of a module, locked behind an anomalous core to function."
+	incompatible_modules = list(/obj/item/mod/module/anomaly_locked)
+	/// The core item the module runs off.
+	var/obj/item/assembly/signaler/anomaly/core
+	/// Accepted types of anomaly cores.
+	var/list/accepted_anomalies = list(/obj/item/assembly/signaler/anomaly)
+	/// If this one starts with a core in.
+	var/prebuilt = FALSE
+
+/obj/item/mod/module/anomaly_locked/Initialize(mapload)
+	. = ..()
+	if(!prebuilt || !length(accepted_anomalies))
+		return
+	var/core_path = pick(accepted_anomalies)
+	core = new core_path(src)
+	update_icon_state()
+
+/obj/item/mod/module/anomaly_locked/Destroy()
+	QDEL_NULL(core)
+	return ..()
+
+/obj/item/mod/module/anomaly_locked/examine(mob/user)
+	. = ..()
+	if(!length(accepted_anomalies))
+		return
+	if(core)
+		. += span_notice("There is a [core.name] installed in it. You could remove it with a <b>screwdriver</b>...")
+	else
+		var/list/core_list = list()
+		for(var/path in accepted_anomalies)
+			var/atom/core_path = path
+			core_list += initial(core_path.name)
+		. += span_notice("You need to insert \a [english_list(core_list, and_text = " or ")] for this module to function.")
+
+/obj/item/mod/module/anomaly_locked/on_select()
+	if(!core)
+		balloon_alert(mod.wearer, "no core!")
+		return
+	return ..()
+
+/obj/item/mod/module/anomaly_locked/on_process(delta_time)
+	. = ..()
+	if(!core)
+		return FALSE
+
+/obj/item/mod/module/anomaly_locked/on_active_process(delta_time)
+	if(!core)
+		return FALSE
+	return TRUE
+
+/obj/item/mod/module/anomaly_locked/attackby(obj/item/item, mob/living/user, params)
+	if(item.type in accepted_anomalies)
+		if(core)
+			balloon_alert(user, "core already in!")
+			return
+		if(!user.transferItemToLoc(item, src))
+			return
+		core = item
+		balloon_alert(user, "core installed")
+		playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+		update_icon_state()
+	else
+		return ..()
+
+/obj/item/mod/module/anomaly_locked/screwdriver_act(mob/living/user, obj/item/tool)
+	. = ..()
+	if(!core)
+		balloon_alert(user, "no core!")
+		return
+	balloon_alert(user, "removing core...")
+	if(!do_after(user, 3 SECONDS, target = src))
+		balloon_alert(user, "interrupted!")
+		return
+	balloon_alert(user, "core removed")
+	core.forceMove(drop_location())
+	if(Adjacent(user) && !issilicon(user))
+		user.put_in_hands(core)
+	core = null
+	update_icon_state()
+
+/obj/item/mod/module/anomaly_locked/update_icon_state()
+	icon_state = initial(icon_state) + (core ? "-core" : "")
+	return ..()

code/modules/mod/modules/modules.dm

@@ -0,0 +1,96 @@
+/obj/item/mod/module/anti_magic/on_suit_activation()
+	ADD_TRAIT(mod.wearer, TRAIT_ANTIMAGIC, MOD_TRAIT)
+	ADD_TRAIT(mod.wearer, TRAIT_HOLY, MOD_TRAIT)
+
+/obj/item/mod/module/anti_magic/on_suit_deactivation()
+	REMOVE_TRAIT(mod.wearer, TRAIT_ANTIMAGIC, MOD_TRAIT)
+	REMOVE_TRAIT(mod.wearer, TRAIT_HOLY, MOD_TRAIT)
+
+/obj/item/mod/module/anti_magic/wizard
+	name = "MOD magic neutralizer module"
+	desc = "The caster wielding this spell gains an invisible barrier around them, channeling arcane power through \
+		specialized runes engraved onto the surface of the suit to generate anti-magic field. \
+		The field will neutralize all magic that comes into contact with the user. \
+		It will not protect the caster from social ridicule."
+	icon_state = "magic_neutralizer"
+
+/obj/item/mod/module/anti_magic/wizard/on_suit_activation()
+	ADD_TRAIT(mod.wearer, TRAIT_ANTIMAGIC_NO_SELFBLOCK, MOD_TRAIT)
+
+/obj/item/mod/module/anti_magic/wizard/on_suit_deactivation()
+	REMOVE_TRAIT(mod.wearer, TRAIT_ANTIMAGIC_NO_SELFBLOCK, MOD_TRAIT)
+
+/obj/item/mod/module/kinesis //TODO POST-MERGE MAKE NOT SUCK ASS, MAKE BALLER AS FUCK
+	name = "MOD kinesis module"
+	desc = "A modular plug-in to the forearm, this module was presumed lost for many years, \
+		despite the suits it used to be mounted on still seeing some circulation. \
+		This piece of technology allows the user to generate precise anti-gravity fields, \
+		letting them move objects as small as a titanium rod to as large as industrial machinery. \
+		Oddly enough, it doesn't seem to work on living creatures."
+	icon_state = "kinesis"
+//	module_type = MODULE_ACTIVE
+	module_type = MODULE_TOGGLE
+//	complexity = 3
+	complexity = 0
+	active_power_cost = DEFAULT_CHARGE_DRAIN*0.75
+//	use_power_cost = DEFAULT_CHARGE_DRAIN*3
+	removable = FALSE
+	incompatible_modules = list(/obj/item/mod/module/kinesis)
+	cooldown_time = 0.5 SECONDS
+	var/has_tk = FALSE
+
+/obj/item/mod/module/kinesis/on_activation()
+	. = ..()
+	if(!.)
+		return
+	if(mod.wearer.dna.check_mutation(TK))
+		has_tk = TRUE
+	else
+		mod.wearer.dna.add_mutation(TK)
+
+/obj/item/mod/module/kinesis/on_deactivation()
+	. = ..()
+	if(!.)
+		return
+	if(has_tk)
+		has_tk = FALSE
+		return
+	mod.wearer.dna.remove_mutation(TK)
+
+/obj/item/mod/module/insignia
+	name = "MOD insignia module"
+	desc = "Despite the existence of IFF systems, radio communique, and modern methods of deductive reasoning involving \
+		the wearer's own eyes, colorful paint jobs remain a popular way for different factions in the galaxy to display who \
+		they are. This system utilizes a series of tiny moving paint sprayers to both apply and remove different \
+		color patterns to and from the suit."
+	icon_state = "insignia"
+	removable = FALSE
+	incompatible_modules = list(/obj/item/mod/module/insignia)
+	overlay_state_inactive = "insignia"
+
+/obj/item/mod/module/insignia/generate_worn_overlay()
+	overlay_state_inactive = "[initial(overlay_state_inactive)]-[mod.skin]"
+	. = ..()
+	for(var/mutable_appearance/appearance as anything in .)
+		appearance.color = color
+
+/obj/item/mod/module/insignia/commander
+	color = "#4980a5"
+
+/obj/item/mod/module/insignia/security
+	color = "#b30d1e"
+
+/obj/item/mod/module/insignia/engineer
+	color = "#e9c80e"
+
+/obj/item/mod/module/insignia/medic
+	color = "#ebebf5"
+
+/obj/item/mod/module/insignia/janitor
+	color = "#7925c7"
+
+/obj/item/mod/module/insignia/clown
+	color = "#ff1fc7"
+
+/obj/item/mod/module/insignia/chaplain
+	color = "#f0a00c"

code/modules/mod/modules/modules_engineering.dm

@@ -0,0 +1,215 @@
+//Engineering modules for MODsuits
+
+///Welding Protection - Makes the helmet protect from flashes and welding.
+/obj/item/mod/module/welding
+	name = "MOD welding protection module"
+	desc = "A module installed into the visor of the suit, this projects a \
+		polarized, holographic overlay in front of the user's eyes. It's rated high enough for \
+		immunity against extremities such as spot and arc welding, solar eclipses, and handheld flashlights."
+	icon_state = "welding"
+	complexity = 1
+	incompatible_modules = list(/obj/item/mod/module/welding)
+	overlay_state_inactive = "module_welding"
+
+/obj/item/mod/module/welding/on_suit_activation()
+	mod.helmet.flash_protect = 2
+
+/obj/item/mod/module/welding/on_suit_deactivation(deleting = FALSE)
+	if(deleting)
+		return
+	mod.helmet.flash_protect = initial(mod.helmet.flash_protect)
+
+///T-Ray Scan - Scans the terrain for undertile objects.
+/obj/item/mod/module/t_ray
+	name = "MOD t-ray scan module"
+	desc = "A module installed into the visor of the suit, allowing the user to use a pulse of terahertz radiation \
+		to essentially echolocate things beneath the floor, mostly cables and pipes. \
+		A staple of atmospherics work, and counter-smuggling work."
+	icon_state = "tray"
+	module_type = MODULE_TOGGLE
+	complexity = 1
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.5
+	incompatible_modules = list(/obj/item/mod/module/t_ray)
+	cooldown_time = 0.5 SECONDS
+	/// T-ray scan range.
+	var/range = 4
+
+/obj/item/mod/module/t_ray/on_active_process(delta_time)
+	t_ray_scan(mod.wearer, 0.8 SECONDS, range)
+
+///Magnetic Stability - Gives the user a slowdown but makes them negate gravity and be immune to slips.
+/obj/item/mod/module/magboot
+	name = "MOD magnetic stability module"
+	desc = "These are powerful electromagnets fitted into the suit's boots, allowing users both \
+		excellent traction no matter the condition indoors, and to essentially hitch a ride on the exterior of a hull. \
+		However, these basic models do not feature computerized systems to automatically toggle them on and off, \
+		so numerous users report a certain stickiness to their steps."
+	icon_state = "magnet"
+	module_type = MODULE_TOGGLE
+	complexity = 2
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.5
+	incompatible_modules = list(/obj/item/mod/module/magboot)
+	cooldown_time = 0.5 SECONDS
+	/// Slowdown added onto the suit.
+	var/slowdown_active = 2
+
+/obj/item/mod/module/magboot/on_activation()
+	. = ..()
+	if(!.)
+		return
+	mod.boots.clothing_flags |= NOSLIP
+	ADD_TRAIT(mod.wearer, TRAIT_NOSLIPWATER, MOD_TRAIT)
+	mod.slowdown += slowdown_active
+	mod.wearer.update_gravity(mod.wearer.has_gravity())
+	mod.wearer.update_equipment_speed_mods()
+
+/obj/item/mod/module/magboot/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	mod.boots.clothing_flags &= ~NOSLIP
+	REMOVE_TRAIT(mod.wearer, TRAIT_NOSLIPWATER, MOD_TRAIT)
+	mod.slowdown -= slowdown_active
+	mod.wearer.update_gravity(mod.wearer.has_gravity())
+	mod.wearer.update_equipment_speed_mods()
+
+/obj/item/mod/module/magboot/advanced
+	name = "MOD advanced magnetic stability module"
+	removable = FALSE
+	complexity = 0
+	slowdown_active = 0
+
+///Emergency Tether - Shoots a grappling hook projectile in 0g that throws the user towards it.
+/obj/item/mod/module/tether
+	name = "MOD emergency tether module"
+	desc = "A custom-built grappling-hook powered by a winch capable of hauling the user. \
+		While some older models of cargo-oriented grapples have capacities of a few tons, \
+		these are only capable of working in zero-gravity environments, a blessing to some Engineers."
+	icon_state = "tether"
+	module_type = MODULE_ACTIVE
+	complexity = 3
+	use_power_cost = DEFAULT_CHARGE_DRAIN
+	incompatible_modules = list(/obj/item/mod/module/tether)
+	cooldown_time = 1.5 SECONDS
+
+/obj/item/mod/module/tether/on_use()
+	if(mod.wearer.has_gravity(get_turf(src)))
+		balloon_alert(mod.wearer, "too much gravity!")
+		playsound(src, "gun_dry_fire", 25, TRUE)
+		return FALSE
+	return ..()
+
+/obj/item/mod/module/tether/on_select_use(atom/target)
+	. = ..()
+	if(!.)
+		return
+	var/obj/item/projectile/tether = new /obj/item/projectile/tether(mod.wearer.loc)
+	tether.preparePixelProjectile(target, mod.wearer)
+	tether.firer = mod.wearer
+	playsound(src, 'sound/weapons/batonextend.ogg', 25, TRUE)
+	INVOKE_ASYNC(tether, /obj/item/projectile.proc/fire)
+	drain_power(use_power_cost)
+
+/obj/item/projectile/tether
+	name = "tether"
+	icon_state = "tether_projectile"
+	icon = 'icons/obj/clothing/modsuit/mod_modules.dmi'
+	damage = 0
+	nodamage = TRUE
+	range = 10
+	hitsound = 'sound/weapons/batonextend.ogg'
+	hitsound_wall = 'sound/weapons/batonextend.ogg'
+	suppressed = SUPPRESSED_VERY
+	hit_threshhold = LATTICE_LAYER
+	/// Reference to the beam following the projectile.
+	var/line
+
+/obj/item/projectile/tether/fire(setAngle)
+	if(firer)
+		line = firer.Beam(src, "line", 'icons/obj/clothing/modsuit/mod_modules.dmi')
+	..()
+
+/obj/item/projectile/tether/on_hit(atom/target)
+	. = ..()
+	if(firer)
+		firer.throw_at(target, 10, 1, firer, FALSE, FALSE, null, MOVE_FORCE_NORMAL, TRUE)
+
+/obj/item/projectile/tether/Destroy()
+	QDEL_NULL(line)
+	return ..()
+
+///Radiation Protection - Protects the user from radiation, gives them a geiger counter and rad info in the panel.
+/obj/item/mod/module/rad_protection
+	name = "MOD radiation protection module"
+	desc = "A module utilizing polymers and reflective shielding to protect the user against ionizing radiation."
+	icon_state = "radshield"
+	complexity = 2
+	idle_power_cost = DEFAULT_CHARGE_DRAIN * 0.3
+	incompatible_modules = list(/obj/item/mod/module/rad_protection)
+
+/obj/item/mod/module/rad_protection/on_suit_activation()
+	mod.armor = mod.armor.modifyRating(rad = 65)
+	mod.rad_flags = RAD_PROTECT_CONTENTS|RAD_NO_CONTAMINATE
+	for(var/obj/item/part in mod.mod_parts)
+		part.armor = mod.armor
+		part.rad_flags = mod.rad_flags
+
+/obj/item/mod/module/rad_protection/on_suit_deactivation(deleting = FALSE)
+	mod.armor = mod.armor.modifyRating(rad = -65)
+	mod.rad_flags = NONE
+	for(var/obj/item/part in mod.mod_parts)
+		part.armor = mod.armor
+		part.rad_flags = mod.rad_flags
+
+///Constructor - Lets you build quicker and create RCD holograms.
+/obj/item/mod/module/constructor
+	name = "MOD constructor module"
+	desc = "This module entirely occupies the wearer's forearm, notably causing conflict with \
+		advanced arm servos meant to carry crewmembers. However, it contains the \
+		latest engineering schematics combined with inbuilt memory to help the user build walls."
+	icon_state = "constructor"
+	module_type = MODULE_USABLE
+	complexity = 2
+	idle_power_cost = DEFAULT_CHARGE_DRAIN * 0.2
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 2
+	incompatible_modules = list(/obj/item/mod/module/constructor, /obj/item/mod/module/quick_carry)
+	cooldown_time = 11 SECONDS
+
+/obj/item/mod/module/constructor/on_suit_activation()
+	ADD_TRAIT(mod.wearer, TRAIT_QUICK_BUILD, MOD_TRAIT)
+
+/obj/item/mod/module/constructor/on_suit_deactivation(deleting = FALSE)
+	REMOVE_TRAIT(mod.wearer, TRAIT_QUICK_BUILD, MOD_TRAIT)
+
+///Mister - Sprays water over an area.
+/obj/item/mod/module/mister
+	name = "MOD water mister module"
+	desc = "A module containing a mister, able to spray it over areas."
+	icon_state = "mister"
+	module_type = MODULE_ACTIVE
+	complexity = 2
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.3
+	device = /obj/item/reagent_containers/spray/mister
+	incompatible_modules = list(/obj/item/mod/module/mister)
+	cooldown_time = 0.5 SECONDS
+	/// Volume of our reagent holder.
+	var/volume = 500
+
+/obj/item/mod/module/mister/Initialize(mapload)
+	create_reagents(volume, OPENCONTAINER)
+	return ..()
+
+///Resin Mister - Sprays resin over an area.
+/obj/item/mod/module/mister/atmos
+	name = "MOD resin mister module"
+	desc = "An atmospheric resin mister, able to fix up areas quickly."
+	device = /obj/item/extinguisher/mini/nozzle/mod
+	volume = 250
+
+/obj/item/mod/module/mister/atmos/Initialize(mapload)
+	. = ..()
+	reagents.add_reagent(/datum/reagent/water, volume)
+
+/obj/item/extinguisher/mini/nozzle/mod
+	name = "MOD atmospheric mister"
+	desc = "An atmospheric resin mister with three modes, mounted as a module."

code/modules/mod/modules/modules_general.dm

@@ -0,0 +1,395 @@
+//General modules for MODsuits
+
+///Storage - Adds a storage component to the suit.
+/obj/item/mod/module/storage
+	name = "MOD storage containment module"
+	desc = "What amounts to a series of integrated storage compartments and specialized pockets installed across \
+		the surface of the suit, useful for storing various bits, and or bobs."
+	icon_state = "storage"
+	complexity = 3
+	incompatible_modules = list(/obj/item/mod/module/storage)
+	module_type = MODULE_USABLE
+	cooldown_time = 0.5 SECONDS
+	allowed_inactive = TRUE
+	/// Bag we have stored.
+	var/obj/item/storage/backpack/stored
+
+/obj/item/mod/module/storage/attackby(obj/item/I, mob/user, params)
+	if(!istype(I, /obj/item/storage/backpack))
+		return ..()
+	var/obj/item/storage/backpack/B = I
+	if(stored)
+		balloon_alert(user, "backpack already installed!")
+		return
+	if(!user.transferItemToLoc(B, src))
+		return
+	stored = B
+	balloon_alert(user, "backpack installed")
+	playsound(src, 'sound/machines/click.ogg', 30, TRUE)
+
+/obj/item/mod/module/storage/screwdriver_act(mob/living/user, obj/item/tool)
+	. = ..()
+	if(!stored)
+		balloon_alert(user, "no backpack!")
+		return
+	balloon_alert(user, "removing backpack...")
+	if(!do_after(user, 3 SECONDS, target = src))
+		balloon_alert(user, "interrupted!")
+		return
+	balloon_alert(user, "backpack removed")
+	stored.forceMove(drop_location())
+	if(Adjacent(user) && !issilicon(user))
+		user.put_in_hands(stored)
+	stored = null
+
+/obj/item/mod/module/storage/on_use()
+	. = ..()
+	if(!.)
+		return
+	if(!stored)
+		var/obj/item/storage/backpack/holding = mod.wearer.get_active_held_item()
+		if(!holding)
+			balloon_alert(mod.wearer, "no backpack installed!")
+			return
+		if(!istype(holding))
+			balloon_alert(mod.wearer, "it doesn't fit!")
+			return
+		if(mod.wearer.transferItemToLoc(holding, src, force = FALSE, silent = TRUE))
+			stored = holding
+			balloon_alert(mod.wearer, "backpack stored")
+			playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+	else if(mod.wearer.put_in_active_hand(stored, forced = FALSE, ignore_animation = TRUE))
+		balloon_alert(mod.wearer, "backpack retrieved")
+		playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+	else
+		balloon_alert(mod.wearer, "backpack storage full!")
+
+/obj/item/mod/module/storage/Exited(atom/movable/gone, direction)
+	. = ..()
+	if(gone == stored)
+		stored = null
+
+/obj/item/mod/module/storage/Destroy()
+	QDEL_NULL(stored)
+	return ..()
+
+///Ion Jetpack - Lets the user fly freely through space using battery charge.
+/obj/item/mod/module/jetpack
+	name = "MOD ion jetpack module"
+	desc = "A series of electric thrusters installed across the suit, this is a module highly anticipated by trainee Engineers. \
+		Rather than using gasses for combustion thrust, these jets are capable of accelerating ions using \
+		charge from the suit's charge. Some say this isn't Nakamura Engineering's first foray into jet-enabled suits."
+	icon_state = "jetpack"
+	module_type = MODULE_TOGGLE
+	complexity = 3
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.5
+	use_power_cost = DEFAULT_CHARGE_DRAIN
+	incompatible_modules = list(/obj/item/mod/module/jetpack)
+	cooldown_time = 0.5 SECONDS
+	overlay_state_inactive = "module_jetpack"
+	overlay_state_active = "module_jetpack_on"
+	/// Do we stop the wearer from gliding in space.
+	var/stabilizers = FALSE
+	/// Do we give the wearer a speed buff.
+	var/full_speed = FALSE
+	var/datum/effect_system/trail_follow/ion/ion_trail
+
+/obj/item/mod/module/jetpack/Initialize(mapload)
+	. = ..()
+	ion_trail = new
+	ion_trail.set_up(src)
+
+/obj/item/mod/module/jetpack/Destroy()
+	QDEL_NULL(ion_trail)
+	return ..()
+
+/obj/item/mod/module/jetpack/on_activation()
+	. = ..()
+	if(!.)
+		return
+	ion_trail.start()
+	RegisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED, .proc/move_react)
+	if(full_speed)
+		mod.wearer.add_movespeed_modifier(/datum/movespeed_modifier/jetpack/fullspeed)
+	else
+		mod.wearer.add_movespeed_modifier(/datum/movespeed_modifier/jetpack)
+
+/obj/item/mod/module/jetpack/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	stabilizers = FALSE
+	ion_trail.stop()
+	UnregisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED)
+	mod.wearer.remove_movespeed_modifier(/datum/movespeed_modifier/jetpack/fullspeed)
+	mod.wearer.remove_movespeed_modifier(/datum/movespeed_modifier/jetpack)
+
+/obj/item/mod/module/jetpack/get_configuration()
+	. = ..()
+	.["stabilizers"] = add_ui_configuration("Stabilizers", "bool", stabilizers)
+
+/obj/item/mod/module/jetpack/configure_edit(key, value)
+	switch(key)
+		if("stabilizers")
+			stabilizers = text2num(value)
+
+/obj/item/mod/module/jetpack/proc/move_react(mob/user)
+	allow_thrust()
+
+/obj/item/mod/module/jetpack/proc/allow_thrust(use_fuel = TRUE)
+	if(!active)
+		return FALSE
+	if(!use_fuel)
+		return check_power(use_power_cost)
+	if(!drain_power(use_power_cost))
+		return FALSE
+	return TRUE
+
+/obj/item/mod/module/jetpack/advanced
+	name = "MOD advanced ion jetpack module"
+	desc = "An improvement on the previous model of electric thrusters. This one achieves higher speeds through \
+		mounting of more jets and a red paint applied on it."
+	icon_state = "jetpack_advanced"
+	overlay_state_inactive = "module_jetpackadv"
+	overlay_state_active = "module_jetpackadv_on"
+	full_speed = TRUE
+
+///Eating Apparatus - Lets the user eat/drink with the suit on.
+/obj/item/mod/module/mouthhole
+	name = "MOD eating apparatus module"
+	desc = "A favorite by Miners, this modification to the helmet utilizes a nanotechnology barrier infront of the mouth \
+		to allow eating and drinking while retaining protection and atmosphere. However, it won't free you from masks, \
+		lets pepper spray pass through and it will do nothing to improve the taste of a goliath steak."
+	icon_state = "apparatus"
+	complexity = 1
+	incompatible_modules = list(/obj/item/mod/module/mouthhole)
+	overlay_state_inactive = "module_apparatus"
+	/// Former flags of the helmet.
+	var/former_flags = NONE
+	/// Former visor flags of the helmet.
+	var/former_visor_flags = NONE
+
+/obj/item/mod/module/mouthhole/on_install()
+	former_flags = mod.helmet.flags_cover
+	former_visor_flags = mod.helmet.visor_flags_cover
+	mod.helmet.flags_cover &= ~HEADCOVERSMOUTH
+	mod.helmet.visor_flags_cover &= ~HEADCOVERSMOUTH
+
+/obj/item/mod/module/mouthhole/on_uninstall(deleting = FALSE)
+	if(deleting)
+		return
+	mod.helmet.flags_cover |= former_flags
+	mod.helmet.visor_flags_cover |= former_visor_flags
+
+///EMP Shield - Protects the suit from EMPs.
+/obj/item/mod/module/emp_shield
+	name = "MOD EMP shield module"
+	desc = "A field inhibitor installed into the suit, protecting it against feedback such as \
+		electromagnetic pulses that would otherwise damage the electronic systems of the suit or it's modules. \
+		However, it will take from the suit's power to do so."
+	icon_state = "empshield"
+	complexity = 1
+	idle_power_cost = DEFAULT_CHARGE_DRAIN * 0.3
+	incompatible_modules = list(/obj/item/mod/module/emp_shield)
+
+/obj/item/mod/module/emp_shield/on_install()
+	mod.AddElement(/datum/element/empprotection, EMP_PROTECT_SELF|EMP_PROTECT_WIRES|EMP_PROTECT_CONTENTS)
+
+/obj/item/mod/module/emp_shield/on_uninstall(deleting = FALSE)
+	mod.RemoveElement(/datum/element/empprotection, EMP_PROTECT_SELF|EMP_PROTECT_WIRES|EMP_PROTECT_CONTENTS)
+
+/obj/item/mod/module/emp_shield/advanced
+	name = "MOD advanced EMP shield module"
+	desc = "An advanced field inhibitor installed into the suit, protecting it against feedback such as \
+		electromagnetic pulses that would otherwise damage the electronic systems of the suit or electronic devices on the wearer, \
+		including augmentations. However, it will take from the suit's power to do so."
+	complexity = 2
+
+/obj/item/mod/module/emp_shield/advanced/on_suit_activation()
+	mod.wearer.AddElement(/datum/element/empprotection, EMP_PROTECT_SELF|EMP_PROTECT_CONTENTS)
+
+/obj/item/mod/module/emp_shield/advanced/on_suit_deactivation(deleting)
+	mod.wearer.RemoveElement(/datum/element/empprotection, EMP_PROTECT_SELF|EMP_PROTECT_CONTENTS)
+
+///Flashlight - Gives the suit a customizable flashlight.
+/obj/item/mod/module/flashlight
+	name = "MOD flashlight module"
+	desc = "A simple pair of configurable flashlights installed on the left and right sides of the helmet, \
+		useful for providing light in a variety of ranges and colors. \
+		Some survivalists prefer the color green for their illumination, for reasons unknown."
+	icon_state = "flashlight"
+	module_type = MODULE_TOGGLE
+	complexity = 1
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.3
+	incompatible_modules = list(/obj/item/mod/module/flashlight)
+	cooldown_time = 0.5 SECONDS
+	overlay_state_inactive = "module_light"
+	light_color = COLOR_WHITE
+	light_range = 4
+	light_power = 1
+	/// Charge drain per range amount.
+	var/base_power = DEFAULT_CHARGE_DRAIN * 0.1
+	/// Minimum range we can set.
+	var/min_range = 2
+	/// Maximum range we can set.
+	var/max_range = 5
+
+/obj/item/mod/module/flashlight/on_activation()
+	. = ..()
+	if(!.)
+		return
+	mod.set_light(light_range, light_power, light_color)
+	active_power_cost = base_power * light_range
+
+/obj/item/mod/module/flashlight/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	mod.set_light(0, 0)
+
+/obj/item/mod/module/flashlight/on_process(delta_time)
+	active_power_cost = base_power * light_range
+	return ..()
+
+/obj/item/mod/module/flashlight/generate_worn_overlay()
+	. = ..()
+	if(!active)
+		return
+	var/mutable_appearance/light_icon = mutable_appearance(overlay_icon_file, "module_light_on")
+	light_icon.appearance_flags = RESET_COLOR
+	light_icon.color = light_color
+	. += light_icon
+
+/obj/item/mod/module/flashlight/get_configuration()
+	. = ..()
+	.["light_color"] = add_ui_configuration("Light Color", "color", light_color)
+	.["light_range"] = add_ui_configuration("Light Range", "number", light_range)
+
+/obj/item/mod/module/flashlight/configure_edit(key, value)
+	switch(key)
+		if("light_color")
+			value = input(usr, "Pick new light color", "Flashlight Color") as color|null
+			if(!value)
+				return
+			var/list/hsl = rgb2hsl(hex2num(copytext(value,2,4)),hex2num(copytext(value,4,6)),hex2num(copytext(value,6,8)))
+			if(hsl[3] < 0.5)
+				balloon_alert(mod.wearer, "too dark!")
+				return
+			mod.set_light_color(value)
+			mod.wearer.regenerate_icons()
+			light_color = value
+		if("light_range")
+			mod.set_light_range(clamp(value, min_range, max_range))
+			light_range = clamp(value, min_range, max_range)
+
+///Dispenser - Dispenses an item after a time passes.
+/obj/item/mod/module/dispenser
+	name = "MOD burger dispenser module"
+	desc = "A rare piece of technology reverse-engineered from a prototype found in a Donk Corporation vessel. \
+		This can draw incredible amounts of power from the suit's charge to create edible organic matter in the \
+		palm of the wearer's glove; however, research seemed to have entirely stopped at burgers. \
+		Notably, all attempts to get it to dispense Earl Grey tea have failed."
+	icon_state = "dispenser"
+	module_type = MODULE_USABLE
+	complexity = 3
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 2
+	incompatible_modules = list(/obj/item/mod/module/dispenser)
+	cooldown_time = 5 SECONDS
+	/// Path we dispense.
+	var/dispense_type = /obj/item/reagent_containers/food/snacks/burger/plain
+	/// Time it takes for us to dispense.
+	var/dispense_time = 0 SECONDS
+
+/obj/item/mod/module/dispenser/on_use()
+	. = ..()
+	if(!.)
+		return
+	if(dispense_time && !do_after(mod.wearer, dispense_time, target = mod))
+		balloon_alert(mod.wearer, "interrupted!")
+		return FALSE
+	var/obj/item/dispensed = new dispense_type(mod.wearer.loc)
+	mod.wearer.put_in_hands(dispensed)
+	balloon_alert(mod.wearer, "[dispensed] dispensed")
+	playsound(src, 'sound/machines/click.ogg', 100, TRUE)
+	drain_power(use_power_cost)
+	return dispensed
+
+///Longfall
+
+///Thermal Regulator - Naw.
+
+///DNA Lock - Prevents people without the set DNA from activating the suit.
+/obj/item/mod/module/dna_lock
+	name = "MOD DNA lock module"
+	desc = "A module which engages with the various locks and seals tied to the suit's systems, \
+		enabling it to only be worn by someone corresponding with the user's exact DNA profile; \
+		however, this incredibly sensitive module is shorted out by EMPs. Luckily, cloning has been outlawed."
+	icon_state = "dnalock"
+	module_type = MODULE_USABLE
+	complexity = 2
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 3
+	incompatible_modules = list(/obj/item/mod/module/dna_lock)
+	cooldown_time = 0.5 SECONDS
+	/// The DNA we lock with.
+	var/dna = null
+
+/obj/item/mod/module/dna_lock/on_install()
+	RegisterSignal(mod, COMSIG_MOD_ACTIVATE, .proc/on_mod_activation)
+	RegisterSignal(mod, COMSIG_MOD_MODULE_REMOVAL, .proc/on_mod_removal)
+	RegisterSignal(mod, COMSIG_ATOM_EMP_ACT, .proc/on_emp)
+	RegisterSignal(mod, COMSIG_ATOM_EMAG_ACT, .proc/on_emag)
+
+/obj/item/mod/module/dna_lock/on_uninstall(deleting = FALSE)
+	UnregisterSignal(mod, COMSIG_MOD_ACTIVATE)
+	UnregisterSignal(mod, COMSIG_MOD_MODULE_REMOVAL)
+	UnregisterSignal(mod, COMSIG_ATOM_EMP_ACT)
+	UnregisterSignal(mod, COMSIG_ATOM_EMAG_ACT)
+
+/obj/item/mod/module/dna_lock/on_use()
+	. = ..()
+	if(!.)
+		return
+	dna = mod.wearer.dna.unique_enzymes
+	balloon_alert(mod.wearer, "dna updated")
+	drain_power(use_power_cost)
+
+/obj/item/mod/module/dna_lock/emp_act(severity)
+	. = ..()
+	if(. & EMP_PROTECT_SELF)
+		return
+	on_emp(src, severity)
+
+/obj/item/mod/module/dna_lock/emag_act(mob/user, obj/item/card/emag/emag_card)
+	. = ..()
+	on_emag(src, user, emag_card)
+
+/obj/item/mod/module/dna_lock/proc/dna_check(mob/user)
+	if(!iscarbon(user))
+		return FALSE
+	var/mob/living/carbon/carbon_user = user
+	if(!dna  || (carbon_user.has_dna() && carbon_user.dna.unique_enzymes == dna))
+		return TRUE
+	balloon_alert(user, "dna locked!")
+	return FALSE
+
+/obj/item/mod/module/dna_lock/proc/on_emp(datum/source, severity)
+	SIGNAL_HANDLER
+
+	dna = null
+
+/obj/item/mod/module/dna_lock/proc/on_emag(datum/source, mob/user, obj/item/card/emag/emag_card)
+	SIGNAL_HANDLER
+
+	dna = null
+
+/obj/item/mod/module/dna_lock/proc/on_mod_activation(datum/source, mob/user)
+	SIGNAL_HANDLER
+
+	if(!dna_check(user))
+		return MOD_CANCEL_ACTIVATE
+
+/obj/item/mod/module/dna_lock/proc/on_mod_removal(datum/source, mob/user)
+	SIGNAL_HANDLER
+
+	if(!dna_check(user))
+		return MOD_CANCEL_REMOVAL
+
+///Sign Language Translator - I want, but no

code/modules/mod/modules/modules_maint.dm

@@ -0,0 +1,157 @@
+//Maint modules for MODsuits
+
+///Springlock Mechanism - allows your modsuit to activate faster, but reagents are very dangerous.
+/obj/item/mod/module/springlock
+	name = "MOD springlock module"
+	desc = "A module that spans the entire size of the MOD unit, sitting under the outer shell. \
+		This mechanical exoskeleton pushes out of the way when the user enters and it helps in booting \
+		up, but was taken out of modern suits because of the springlock's tendency to \"snap\" back \
+		into place when exposed to humidity. You know what it's like to have an entire exoskeleton enter you?"
+	icon_state = "springlock"
+	complexity = 3 // it is inside every part of your suit, so
+	incompatible_modules = list(/obj/item/mod/module/springlock)
+
+/obj/item/mod/module/springlock/on_install()
+	mod.activation_step_time *= 0.5
+
+/obj/item/mod/module/springlock/on_uninstall(deleting = FALSE)
+	mod.activation_step_time *= 2
+
+/obj/item/mod/module/springlock/on_suit_activation()
+	RegisterSignal(mod.wearer, COMSIG_ATOM_EXPOSE_REAGENTS, .proc/on_wearer_exposed)
+
+/obj/item/mod/module/springlock/on_suit_deactivation(deleting = FALSE)
+	UnregisterSignal(mod.wearer, COMSIG_ATOM_EXPOSE_REAGENTS)
+
+///Signal fired when wearer is exposed to reagents
+/obj/item/mod/module/springlock/proc/on_wearer_exposed(atom/source, list/reagents, datum/reagents/source_reagents, methods, volume_modifier, show_message, from_gas)
+	SIGNAL_HANDLER
+
+	if(!reagents.len)
+		return
+	if(!(methods == VAPOR || methods == PATCH || methods == TOUCH))
+		return //remove non-touch reagent exposure
+	to_chat(mod.wearer, span_danger("[src] makes an ominous click sound..."))
+	playsound(src, 'sound/items/modsuit/springlock.ogg', 75, TRUE)
+	addtimer(CALLBACK(src, .proc/snap_shut), rand(3 SECONDS, 5 SECONDS))
+	RegisterSignal(mod, COMSIG_MOD_ACTIVATE, .proc/on_activate_spring_block)
+
+///Signal fired when wearer attempts to activate/deactivate suits
+/obj/item/mod/module/springlock/proc/on_activate_spring_block(datum/source, user)
+	SIGNAL_HANDLER
+
+	balloon_alert(user, "springlocks aren't responding...?")
+	return MOD_CANCEL_ACTIVATE
+
+///Delayed death proc of the suit after the wearer is exposed to reagents
+/obj/item/mod/module/springlock/proc/snap_shut()
+	UnregisterSignal(mod, COMSIG_MOD_ACTIVATE)
+	if(!mod.wearer) //while there is a guaranteed user when on_wearer_exposed() fires, that isn't the same case for this proc
+		return
+	mod.wearer.visible_message("[src] inside [mod.wearer]'s [mod.name] snaps shut, mutilating the user inside!", span_userdanger("*SNAP*"))
+	mod.wearer.emote("scream")
+	playsound(mod.wearer, 'sound/effects/snap.ogg', 75, TRUE, frequency = 0.5)
+	playsound(mod.wearer, 'sound/effects/splat.ogg', 50, TRUE, frequency = 0.5)
+	mod.wearer.client?.give_award(/datum/award/achievement/misc/springlock, mod.wearer)
+	mod.wearer.apply_damage(500, BRUTE, forced = TRUE, spread_damage = TRUE, sharpness = SHARP_POINTY) //boggers, bogchamp, etc
+	if(!HAS_TRAIT(mod.wearer, TRAIT_NODEATH))
+		mod.wearer.death() //just in case, for some reason, they're still alive
+	flash_color(mod.wearer, flash_color = "#FF0000", flash_time = 10 SECONDS)
+
+///Rave Visor - Pointless
+
+///Tanner - Maybe another time
+
+///Balloon Blower - Blows a balloon.
+/obj/item/mod/module/balloon
+	name = "MOD balloon blower module"
+	desc = "A strange module invented years ago by some ingenious mimes. It blows balloons."
+	icon_state = "bloon"
+	module_type = MODULE_USABLE
+	complexity = 1
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 0.5
+	incompatible_modules = list(/obj/item/mod/module/balloon)
+	cooldown_time = 15 SECONDS
+
+/obj/item/mod/module/balloon/on_use()
+	. = ..()
+	if(!.)
+		return
+	if(!do_after(mod.wearer, 10 SECONDS, target = mod))
+		return FALSE
+	mod.wearer.adjustOxyLoss(20)
+	playsound(src, 'sound/items/modsuit/inflate_bloon.ogg', 50, TRUE)
+	var/obj/item/toy/balloon/balloon = new(get_turf(src))
+	mod.wearer.put_in_hands(balloon)
+	drain_power(use_power_cost)
+
+///Paper Dispenser - Dispenses (sometimes burning) paper sheets.
+/obj/item/mod/module/paper_dispenser
+	name = "MOD paper dispenser module"
+	desc = "A simple module designed by the bureaucrats of Torch Bay. \
+		It dispenses 'warm, clean, and crisp sheets of paper' onto a nearby table. Usually."
+	icon_state = "paper_maker"
+	module_type = MODULE_USABLE
+	complexity = 1
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 0.5
+	incompatible_modules = list(/obj/item/mod/module/paper_dispenser)
+	cooldown_time = 5 SECONDS
+	/// The total number of sheets created by this MOD. The more sheets, them more likely they set on fire.
+	var/num_sheets_dispensed = 0
+
+/obj/item/mod/module/paper_dispenser/on_use()
+	. = ..()
+	if(!.)
+		return
+	if(!do_after(mod.wearer, 1 SECONDS, target = mod))
+		return FALSE
+
+	var/obj/item/paper/crisp_paper = new(get_turf(src))
+	crisp_paper.desc = "It's crisp and warm to the touch. Must be fresh."
+
+	var/obj/structure/table/nearby_table = locate() in range(1, mod.wearer)
+	playsound(get_turf(src), 'sound/machines/click.ogg', 50, TRUE)
+	balloon_alert(mod.wearer, "dispensed paper[nearby_table ? " onto table":""]")
+
+	mod.wearer.put_in_hands(crisp_paper)
+	if(nearby_table)
+		mod.wearer.transferItemToLoc(crisp_paper, nearby_table.drop_location(), silent = FALSE)
+
+	// Up to a 30% chance to set the sheet on fire, +2% per sheet made
+	if(prob(min(num_sheets_dispensed * 2, 30)))
+		if(crisp_paper in mod.wearer.held_items)
+			mod.wearer.dropItemToGround(crisp_paper, force = TRUE)
+		crisp_paper.balloon_alert(mod.wearer, "PC LOAD LETTER!")
+		crisp_paper.visible_message(span_warning("[crisp_paper] bursts into flames, it's too crisp!"))
+		crisp_paper.fire_act(1000, 100)
+
+	drain_power(use_power_cost)
+	num_sheets_dispensed++
+
+
+///Stamper - Extends a stamp that can switch between accept/deny modes.
+/obj/item/mod/module/stamp
+	name = "MOD stamper module"
+	desc = "A module installed into the wrist of the suit, this functions as a high-power stamp, \
+		able to switch between accept and deny modes."
+	icon_state = "stamp"
+	module_type = MODULE_ACTIVE
+	complexity = 1
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.3
+	device = /obj/item/stamp/mod
+	incompatible_modules = list(/obj/item/mod/module/stamp)
+	cooldown_time = 0.5 SECONDS
+
+/obj/item/stamp/mod
+	name = "MOD electronic stamp"
+	desc = "A high-power stamp, able to switch between accept and deny mode when used."
+
+/obj/item/stamp/mod/attack_self(mob/user, modifiers)
+	. = ..()
+	if(icon_state == "stamp-ok")
+		icon_state = "stamp-deny"
+	else
+		icon_state = "stamp-ok"
+	balloon_alert(user, "switched mode")
+
+///Atrocinator - Perhaps another time

code/modules/mod/modules/modules_medical.dm

@@ -0,0 +1,189 @@
+//Medical modules for MODsuits
+
+#define HEALTH_SCAN "Health"
+#define WOUND_SCAN "Wound"
+#define CHEM_SCAN "Chemical"
+
+///Health Analyzer - Gives the user a ranged health analyzer and their health status in the panel.
+/obj/item/mod/module/health_analyzer
+	name = "MOD health analyzer module"
+	desc = "A module installed into the glove of the suit. This is a high-tech biological scanning suite, \
+		allowing the user indepth information on the vitals and injuries of others even at a distance, \
+		all with the flick of the wrist. Data is displayed in a convenient package on HUD in the helmet, \
+		but it's up to you to do something with it."
+	icon_state = "health"
+	module_type = MODULE_ACTIVE
+	complexity = 2
+	use_power_cost = DEFAULT_CHARGE_DRAIN
+	incompatible_modules = list(/obj/item/mod/module/health_analyzer)
+	cooldown_time = 0.5 SECONDS
+	tgui_id = "health_analyzer"
+	/// Scanning mode, changes how we scan something.
+	var/mode = HEALTH_SCAN
+	/// List of all scanning modes.
+	var/static/list/modes = list(HEALTH_SCAN, WOUND_SCAN, CHEM_SCAN)
+
+/obj/item/mod/module/health_analyzer/add_ui_data()
+	. = ..()
+	.["userhealth"] = mod.wearer?.health || 0
+	.["usermaxhealth"] = mod.wearer?.getMaxHealth() || 0
+	.["userbrute"] = mod.wearer?.getBruteLoss() || 0
+	.["userburn"] = mod.wearer?.getFireLoss() || 0
+	.["usertoxin"] = mod.wearer?.getToxLoss() || 0
+	.["useroxy"] = mod.wearer?.getOxyLoss() || 0
+
+/obj/item/mod/module/health_analyzer/on_select_use(atom/target)
+	. = ..()
+	if(!.)
+		return
+	if(!isliving(target) || !mod.wearer.can_read(src))
+		return
+	switch(mode)
+		if(HEALTH_SCAN)
+			healthscan(mod.wearer, target)
+		if(WOUND_SCAN)
+			woundscan(mod.wearer, target)
+		if(CHEM_SCAN)
+			chemscan(mod.wearer, target)
+	drain_power(use_power_cost)
+
+/obj/item/mod/module/health_analyzer/get_configuration()
+	. = ..()
+	.["mode"] = add_ui_configuration("Scan Mode", "list", mode, modes)
+
+/obj/item/mod/module/health_analyzer/configure_edit(key, value)
+	switch(key)
+		if("mode")
+			mode = value
+
+#undef HEALTH_SCAN
+#undef WOUND_SCAN
+#undef CHEM_SCAN
+
+///Quick Carry - Lets the user carry bodies quicker.
+/obj/item/mod/module/quick_carry
+	name = "MOD quick carry module"
+	desc = "A suite of advanced servos, redirecting power from the suit's arms to help carry the wounded; \
+		or simply for fun. However, Nanotrasen has locked the module's ability to assist in hand-to-hand combat."
+	icon_state = "carry"
+	complexity = 1
+	idle_power_cost = DEFAULT_CHARGE_DRAIN * 0.3
+	incompatible_modules = list(/obj/item/mod/module/quick_carry, /obj/item/mod/module/constructor)
+
+/obj/item/mod/module/quick_carry/on_suit_activation()
+	ADD_TRAIT(mod.wearer, TRAIT_QUICKER_CARRY, MOD_TRAIT)
+
+/obj/item/mod/module/quick_carry/on_suit_deactivation(deleting = FALSE)
+	REMOVE_TRAIT(mod.wearer, TRAIT_QUICKER_CARRY, MOD_TRAIT)
+
+/obj/item/mod/module/quick_carry/advanced
+	name = "MOD advanced quick carry module"
+	removable = FALSE
+	complexity = 0
+
+///Injector - No piercing syringes, replace another time
+
+///Organ Thrower
+
+///Patrient Transport
+
+///Defibrillator - Gives the suit an extendable pair of shock paddles.
+/obj/item/mod/module/defibrillator
+	name = "MOD defibrillator module"
+	desc = "A module built into the gauntlets of the suit; commonly known as the 'Healing Hands' by medical professionals. \
+		The user places their palms above the patient. Onboard computers in the suit calculate the necessary voltage, \
+		and a modded targeting computer determines the best position for the user to push. \
+		Twenty five pounds of force are applied to the patient's skin. Shocks travel from the suit's gloves \
+		and counter-shock the heart, and the wearer returns to Medical a hero. Don't you even think about using it as a weapon; \
+		regulations on manufacture and software locks expressly forbid it."
+	icon_state = "defibrillator"
+	module_type = MODULE_ACTIVE
+	complexity = 2
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 25
+	device = /obj/item/shockpaddles/mod
+	overlay_state_inactive = "module_defibrillator"
+	overlay_state_active = "module_defibrillator_active"
+	incompatible_modules = list(/obj/item/mod/module/defibrillator)
+	cooldown_time = 0.5 SECONDS
+	var/defib_cooldown = 5 SECONDS
+
+/obj/item/mod/module/defibrillator/Initialize(mapload)
+	. = ..()
+	RegisterSignal(device, COMSIG_DEFIBRILLATOR_SUCCESS, .proc/on_defib_success)
+
+/obj/item/mod/module/defibrillator/Destroy()
+	UnregisterSignal(device, COMSIG_DEFIBRILLATOR_SUCCESS)
+	. = ..()
+
+/obj/item/mod/module/defibrillator/proc/on_defib_success(obj/item/shockpaddles/source)
+	drain_power(use_power_cost)
+	source.recharge(defib_cooldown)
+	return COMPONENT_DEFIB_STOP
+
+/obj/item/shockpaddles/mod
+	name = "MOD defibrillator gauntlets"
+	req_defib = FALSE
+	icon_state = "defibgauntlets0"
+	item_state = "defibgauntlets0"
+	base_icon_state = "defibgauntlets"
+
+/obj/item/mod/module/defibrillator/combat
+	name = "MOD combat defibrillator module"
+	desc = "A module built into the gauntlets of the suit; commonly known as the 'Healing Hands' by medical professionals. \
+		The user places their palms above the patient. Onboard computers in the suit calculate the necessary voltage, \
+		and a modded targeting computer determines the best position for the user to push. \
+		Twenty five pounds of force are applied to the patient's skin. Shocks travel from the suit's gloves \
+		and counter-shock the heart, and the wearer returns to Medical a hero. \
+		Interdyne Pharmaceutics marketed the domestic version of the Healing Hands as foolproof and unusable as a weapon. \
+		But when it came time to provide their operatives with usable medical equipment, they didn't hesitate to remove \
+		those in-built safeties. Operatives in the field can benefit from what they dub as 'Stun Gloves', able to apply shocks \
+		straight to a victims heart to disable them, or maybe even outright stop their heart with enough power."
+	complexity = 1
+	module_type = MODULE_ACTIVE
+	overlay_state_inactive = "module_defibrillator_combat"
+	overlay_state_active = "module_defibrillator_combat_active"
+	device = /obj/item/shockpaddles/syndicate/mod
+	defib_cooldown = 2.5 SECONDS
+
+/obj/item/shockpaddles/syndicate/mod
+	name = "MOD combat defibrillator gauntlets"
+	req_defib = FALSE
+	icon_state = "syndiegauntlets0"
+	item_state = "syndiegauntlets0"
+	base_icon_state = "syndiegauntlets"
+
+///Thread Ripper
+
+///Surgical Processor - Lets you do advanced surgeries portably.
+/obj/item/mod/module/surgical_processor
+	name = "MOD surgical processor module"
+	desc = "A module using an onboard surgical computer which can be connected to other computers to download and \
+		perform advanced surgeries on the go."
+	icon_state = "surgical_processor"
+	module_type = MODULE_ACTIVE
+	complexity = 2
+	active_power_cost = DEFAULT_CHARGE_DRAIN
+	device = /obj/item/surgical_processor/mod
+	incompatible_modules = list(/obj/item/mod/module/surgical_processor)
+	cooldown_time = 0.5 SECONDS
+
+/obj/item/surgical_processor/mod
+	name = "MOD surgical processor"
+
+/obj/item/mod/module/surgical_processor/preloaded
+	desc = "A module using an onboard surgical computer which can be connected to other computers to download and \
+		perform advanced surgeries on the go. This one came pre-loaded with some advanced surgeries."
+	device = /obj/item/surgical_processor/mod/preloaded
+
+/obj/item/surgical_processor/mod/preloaded
+	advanced_surgeries = list(
+		/datum/surgery/advanced/pacify,
+		/datum/surgery/healing/combo/upgraded/femto,
+		/datum/surgery/advanced/brainwashing,
+		/datum/surgery/advanced/bioware/nerve_splicing,
+		/datum/surgery/advanced/bioware/nerve_grounding,
+		/datum/surgery/advanced/bioware/vein_threading,
+		/datum/surgery/advanced/bioware/muscled_veins,
+		/datum/surgery/advanced/bioware/ligament_hook,
+		/datum/surgery/advanced/bioware/ligament_reinforcement
+	)

code/modules/mod/modules/modules_science.dm

@@ -0,0 +1,135 @@
+//Science modules for MODsuits
+
+///Reagent Scanner - Lets the user scan reagents.
+/obj/item/mod/module/reagent_scanner
+	name = "MOD reagent scanner module"
+	desc = "A module based off research-oriented Nanotrasen HUDs, this is capable of scanning the contents of \
+		containers and projecting the information in an easy-to-read format on the wearer's display. \
+		It cannot detect flavors, so that's up to you."
+	icon_state = "scanner"
+	module_type = MODULE_TOGGLE
+	complexity = 1
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.2
+	incompatible_modules = list(/obj/item/mod/module/reagent_scanner)
+	cooldown_time = 0.5 SECONDS
+
+/obj/item/mod/module/reagent_scanner/on_activation()
+	. = ..()
+	if(!.)
+		return
+	ADD_TRAIT(mod.wearer, TRAIT_REAGENT_SCANNER, MOD_TRAIT)
+
+/obj/item/mod/module/reagent_scanner/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	REMOVE_TRAIT(mod.wearer, TRAIT_REAGENT_SCANNER, MOD_TRAIT)
+
+/obj/item/mod/module/reagent_scanner/advanced
+	name = "MOD advanced reagent scanner module"
+	complexity = 0
+	removable = FALSE
+	var/explosion_detection_dist = 21
+	var/had_research_scanner = FALSE
+
+/obj/item/mod/module/reagent_scanner/advanced/on_activation()
+	. = ..()
+	if(!.)
+		return
+	had_research_scanner = mod.wearer.research_scanner
+	mod.wearer.research_scanner = TRUE
+	RegisterSignal(SSdcs, COMSIG_GLOB_EXPLOSION, .proc/sense_explosion)
+
+/obj/item/mod/module/reagent_scanner/advanced/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	mod.wearer.research_scanner = had_research_scanner
+	had_research_scanner = FALSE
+	UnregisterSignal(SSdcs, COMSIG_GLOB_EXPLOSION)
+
+/obj/item/mod/module/reagent_scanner/advanced/proc/sense_explosion(datum/source, turf/epicenter,
+	devastation_range, heavy_impact_range, light_impact_range, took, orig_dev_range, orig_heavy_range, orig_light_range)
+	SIGNAL_HANDLER
+	var/turf/wearer_turf = get_turf(mod.wearer)
+	if(wearer_turf.z == epicenter.z)
+		return
+	if(get_dist(epicenter, wearer_turf) > explosion_detection_dist)
+		return
+	to_chat(mod.wearer, span_notice("Explosion detected! Epicenter: [devastation_range], Outer: [heavy_impact_range], Shock: [light_impact_range]"))
+
+///Anti-Gravity - Makes the user weightless.
+/obj/item/mod/module/anomaly_locked/antigrav
+	name = "MOD anti-gravity module"
+	desc = "A module that uses a gravitational core to make the user completely weightless."
+	icon_state = "antigrav"
+	module_type = MODULE_TOGGLE
+	complexity = 3
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.7
+	incompatible_modules = list(/obj/item/mod/module/anomaly_locked)
+	cooldown_time = 0.5 SECONDS
+	accepted_anomalies = list(/obj/item/assembly/signaler/anomaly/grav)
+
+/obj/item/mod/module/anomaly_locked/antigrav/on_activation()
+	. = ..()
+	if(!.)
+		return
+	if(mod.wearer.has_gravity())
+		new /obj/effect/temp_visual/mook_dust(get_turf(src))
+	mod.wearer.AddElement(/datum/element/forced_gravity, 0)
+	mod.wearer.update_gravity(mod.wearer.has_gravity())
+	playsound(src, 'sound/effects/gravhit.ogg', 50)
+
+/obj/item/mod/module/anomaly_locked/antigrav/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	mod.wearer.RemoveElement(/datum/element/forced_gravity, 0)
+	mod.wearer.update_gravity(mod.wearer.has_gravity())
+	if(deleting)
+		return
+	if(mod.wearer.has_gravity())
+		new /obj/effect/temp_visual/mook_dust(get_turf(src))
+	playsound(src, 'sound/effects/gravhit.ogg', 50)
+
+/obj/item/mod/module/anomaly_locked/antigrav/prebuilt
+	prebuilt = TRUE
+
+///Teleporter - Lets the user teleport to a nearby location.
+/obj/item/mod/module/anomaly_locked/teleporter
+	name = "MOD teleporter module"
+	desc = "A module that uses a bluespace core to let the user transport their particles elsewhere."
+	icon_state = "teleporter"
+	module_type = MODULE_ACTIVE
+	complexity = 3
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 5
+	cooldown_time = 5 SECONDS
+	accepted_anomalies = list(/obj/item/assembly/signaler/anomaly/bluespace)
+	/// Time it takes to teleport
+	var/teleport_time = 3 SECONDS
+
+/obj/item/mod/module/anomaly_locked/teleporter/on_select_use(atom/target)
+	. = ..()
+	if(!.)
+		return
+	var/turf/open/target_turf = get_turf(target)
+	if(!istype(target_turf) || is_blocked_turf(target_turf) || !(target_turf in view(mod.wearer)))
+		balloon_alert(mod.wearer, "invalid target!")
+		return
+	balloon_alert(mod.wearer, "teleporting...")
+	var/matrix/pre_matrix = matrix()
+	pre_matrix.Scale(4, 0.25)
+	var/matrix/post_matrix = matrix()
+	post_matrix.Scale(0.25, 4)
+	animate(mod.wearer, teleport_time, color = COLOR_CYAN, transform = pre_matrix.Multiply(mod.wearer.transform), easing = SINE_EASING|EASE_OUT)
+	if(!do_after(mod.wearer, teleport_time, target = mod))
+		balloon_alert(mod.wearer, "interrupted!")
+		animate(mod.wearer, teleport_time*0.1, color = null, transform = post_matrix.Multiply(mod.wearer.transform), easing = SINE_EASING|EASE_IN)
+		return
+	animate(mod.wearer, teleport_time*0.1, color = null, transform = post_matrix.Multiply(mod.wearer.transform), easing = SINE_EASING|EASE_IN)
+	if(!do_teleport(mod.wearer, target_turf, asoundin = 'sound/effects/phasein.ogg'))
+		return
+	drain_power(use_power_cost)
+
+/obj/item/mod/module/anomaly_locked/teleporter/prebuilt
+	prebuilt = TRUE

code/modules/mod/modules/modules_security.dm

@@ -0,0 +1,207 @@
+//Security modules for MODsuits
+
+///Cloaking - Lowers the user's visibility, can be interrupted by being touched or attacked.
+/obj/item/mod/module/stealth
+	name = "MOD prototype cloaking module"
+	desc = "A complete retrofitting of the suit, this is a form of visual concealment tech employing esoteric technology \
+		to bend light around the user, as well as mimetic materials to make the surface of the suit match the \
+		surroundings based off sensor data. For some reason, this tech is rarely seen."
+	icon_state = "cloak"
+	module_type = MODULE_TOGGLE
+	complexity = 4
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 2
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 10
+	incompatible_modules = list(/obj/item/mod/module/stealth)
+	cooldown_time = 5 SECONDS
+	/// Whether or not the cloak turns off on bumping.
+	var/bumpoff = TRUE
+	/// The alpha applied when the cloak is on.
+	var/stealth_alpha = 50
+
+/obj/item/mod/module/stealth/on_activation()
+	. = ..()
+	if(!.)
+		return
+	if(bumpoff)
+		RegisterSignal(mod.wearer, COMSIG_LIVING_MOB_BUMP, .proc/unstealth)
+	RegisterSignal(mod.wearer, COMSIG_HUMAN_MELEE_UNARMED_ATTACK, .proc/on_unarmed_attack)
+	RegisterSignal(mod.wearer, COMSIG_ATOM_BULLET_ACT, .proc/on_bullet_act)
+	RegisterSignal(mod.wearer, list(COMSIG_MOB_ITEM_ATTACK, COMSIG_PARENT_ATTACKBY, COMSIG_ATOM_ATTACK_HAND, COMSIG_ATOM_HULK_ATTACK, COMSIG_ATOM_ATTACK_PAW), .proc/unstealth)
+	animate(mod.wearer, alpha = stealth_alpha, time = 1.5 SECONDS)
+	drain_power(use_power_cost)
+
+/obj/item/mod/module/stealth/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	if(bumpoff)
+		UnregisterSignal(mod.wearer, COMSIG_LIVING_MOB_BUMP)
+	UnregisterSignal(mod.wearer, list(COMSIG_HUMAN_MELEE_UNARMED_ATTACK, COMSIG_MOB_ITEM_ATTACK, COMSIG_PARENT_ATTACKBY, COMSIG_ATOM_ATTACK_HAND, COMSIG_ATOM_BULLET_ACT, COMSIG_ATOM_HULK_ATTACK, COMSIG_ATOM_ATTACK_PAW))
+	animate(mod.wearer, alpha = 255, time = 1.5 SECONDS)
+
+/obj/item/mod/module/stealth/proc/unstealth(datum/source)
+	SIGNAL_HANDLER
+
+	to_chat(mod.wearer, span_warning("[src] gets discharged from contact!"))
+	do_sparks(2, TRUE, src)
+	drain_power(use_power_cost)
+	on_deactivation(display_message = TRUE, deleting = FALSE)
+
+/obj/item/mod/module/stealth/proc/on_unarmed_attack(datum/source, atom/target)
+	SIGNAL_HANDLER
+
+	if(!isliving(target))
+		return
+	unstealth(source)
+
+/obj/item/mod/module/stealth/proc/on_bullet_act(datum/source, obj/item/projectile/projectile)
+	SIGNAL_HANDLER
+
+	if(projectile.nodamage)
+		return
+	unstealth(source)
+
+///Magnetic Harness - Automatically puts guns in your suit storage when you drop them.
+/obj/item/mod/module/magnetic_harness
+	name = "MOD magnetic harness module"
+	desc = "Based off old TerraGov harness kits, this magnetic harness automatically attaches dropped guns back to the wearer."
+	icon_state = "mag_harness"
+	complexity = 2
+	use_power_cost = DEFAULT_CHARGE_DRAIN
+	incompatible_modules = list(/obj/item/mod/module/magnetic_harness)
+	/// Time before we activate the magnet.
+	var/magnet_delay = 0.8 SECONDS
+	/// The typecache of all guns we allow.
+	var/static/list/guns_typecache
+	/// The guns already allowed by the modsuit chestplate.
+	var/list/already_allowed_guns = list()
+
+/obj/item/mod/module/magnetic_harness/Initialize(mapload)
+	. = ..()
+	if(!guns_typecache)
+		guns_typecache = typecacheof(list(/obj/item/gun/ballistic, /obj/item/gun/energy, /obj/item/gun/grenadelauncher, /obj/item/gun/chem, /obj/item/gun/syringe))
+
+/obj/item/mod/module/magnetic_harness/on_install()
+	already_allowed_guns = guns_typecache & mod.chestplate.allowed
+	mod.chestplate.allowed |= guns_typecache
+
+/obj/item/mod/module/magnetic_harness/on_uninstall(deleting = FALSE)
+	if(deleting)
+		return
+	mod.chestplate.allowed -= (guns_typecache - already_allowed_guns)
+
+/obj/item/mod/module/magnetic_harness/on_suit_activation()
+	RegisterSignal(mod.wearer, COMSIG_MOB_UNEQUIPPED_ITEM, .proc/check_dropped_item)
+
+/obj/item/mod/module/magnetic_harness/on_suit_deactivation(deleting = FALSE)
+	UnregisterSignal(mod.wearer, COMSIG_MOB_UNEQUIPPED_ITEM)
+
+/obj/item/mod/module/magnetic_harness/proc/check_dropped_item(datum/source, obj/item/dropped_item, force, new_location)
+	SIGNAL_HANDLER
+
+	if(!is_type_in_typecache(dropped_item, guns_typecache))
+		return
+	if(new_location != get_turf(src))
+		return
+	addtimer(CALLBACK(src, .proc/pick_up_item, dropped_item), magnet_delay)
+
+/obj/item/mod/module/magnetic_harness/proc/pick_up_item(obj/item/item)
+	if(!isturf(item.loc) || !item.Adjacent(mod.wearer))
+		return
+	if(!mod.wearer.equip_to_slot_if_possible(item, ITEM_SLOT_SUITSTORE, qdel_on_fail = FALSE, disable_warning = TRUE))
+		return
+	playsound(src, 'sound/items/modsuit/magnetic_harness.ogg', 50, TRUE)
+	balloon_alert(mod.wearer, "[item] reattached")
+	drain_power(use_power_cost)
+
+///Pepper Shoulders
+
+///Holster - Instantly holsters any not huge gun.
+/obj/item/mod/module/holster
+	name = "MOD holster module"
+	desc = "Based off typical storage compartments, this system allows the suit to holster a \
+		standard firearm across its surface and allow for extremely quick retrieval. \
+		While some users prefer the chest, others the forearm for quick deployment, \
+		some law enforcement prefer the holster to extend from the thigh."
+	icon_state = "holster"
+	module_type = MODULE_USABLE
+	complexity = 2
+	incompatible_modules = list(/obj/item/mod/module/holster)
+	cooldown_time = 0.5 SECONDS
+	allowed_inactive = TRUE
+	/// Gun we have holstered.
+	var/obj/item/gun/holstered
+
+/obj/item/mod/module/holster/on_use()
+	. = ..()
+	if(!.)
+		return
+	if(!holstered)
+		var/obj/item/gun/holding = mod.wearer.get_active_held_item()
+		if(!holding)
+			balloon_alert(mod.wearer, "nothing to holster!")
+			return
+		if(!istype(holding) || holding.w_class > WEIGHT_CLASS_BULKY)
+			balloon_alert(mod.wearer, "it doesn't fit!")
+			return
+		if(mod.wearer.transferItemToLoc(holding, src, force = FALSE, silent = TRUE))
+			holstered = holding
+			balloon_alert(mod.wearer, "weapon holstered")
+			playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+	else if(mod.wearer.put_in_active_hand(holstered, forced = FALSE, ignore_animation = TRUE))
+		balloon_alert(mod.wearer, "weapon drawn")
+		playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+	else
+		balloon_alert(mod.wearer, "holster full!")
+
+/obj/item/mod/module/holster/on_uninstall(deleting = FALSE)
+	if(holstered)
+		holstered.forceMove(drop_location())
+
+/obj/item/mod/module/holster/Exited(atom/movable/gone, direction)
+	. = ..()
+	if(gone == holstered)
+		holstered = null
+
+/obj/item/mod/module/holster/Destroy()
+	QDEL_NULL(holstered)
+	return ..()
+
+///Megaphone - Lets you speak loud.
+/obj/item/mod/module/megaphone
+	name = "MOD megaphone module"
+	desc = "A microchip megaphone linked to a MODsuit, for very important purposes, like: loudness."
+	icon_state = "megaphone"
+	module_type = MODULE_TOGGLE
+	complexity = 1
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 0.5
+	incompatible_modules = list(/obj/item/mod/module/megaphone)
+	cooldown_time = 0.5 SECONDS
+	/// List of spans we add to the speaker.
+	var/list/voicespan = list(SPAN_COMMAND)
+
+/obj/item/mod/module/megaphone/on_activation()
+	. = ..()
+	if(!.)
+		return
+	RegisterSignal(mod.wearer, COMSIG_MOB_SAY, .proc/handle_speech)
+
+/obj/item/mod/module/megaphone/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	UnregisterSignal(mod.wearer, COMSIG_MOB_SAY)
+
+/obj/item/mod/module/megaphone/proc/handle_speech(datum/source, list/speech_args)
+	SIGNAL_HANDLER
+
+	speech_args[SPEECH_SPANS] |= voicespan
+	drain_power(use_power_cost)
+
+///Criminal Capture
+
+///Mirage grenade dispenser
+
+///Projectile Dampener
+
+///Active Sonar

code/modules/mod/modules/modules_service.dm

@@ -0,0 +1,66 @@
+//Service modules for MODsuits
+
+///Bike Horn - Plays a bike horn sound.
+/obj/item/mod/module/bikehorn
+	name = "MOD bike horn module"
+	desc = "A shoulder-mounted piece of heavy sonic artillery, this module uses the finest femto-manipulator technology to \
+		precisely deliver an almost lethal squeeze to... a bike horn, producing a significantly memorable sound."
+	icon_state = "bikehorn"
+	module_type = MODULE_USABLE
+	complexity = 1
+	use_power_cost = DEFAULT_CHARGE_DRAIN
+	incompatible_modules = list(/obj/item/mod/module/bikehorn)
+	cooldown_time = 1 SECONDS
+
+/obj/item/mod/module/bikehorn/on_use()
+	. = ..()
+	if(!.)
+		return
+	playsound(src, 'sound/items/bikehorn.ogg', 100, FALSE)
+	drain_power(use_power_cost)
+
+///Microwave Beam - Microwaves items instantly.
+/obj/item/mod/module/microwave_beam
+	name = "MOD microwave beam module"
+	desc = "An oddly domestic device, this module is installed into the user's palm, \
+		hooking up with culinary scanners located in the helmet to blast food with precise microwave radiation, \
+		allowing them to cook food from a distance, with the greatest of ease. Not recommended for use against grapes."
+	icon_state = "microwave_beam"
+	module_type = MODULE_ACTIVE
+	complexity = 2
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 5
+	incompatible_modules = list(/obj/item/mod/module/microwave_beam)
+	cooldown_time = 10 SECONDS
+	var/obj/machinery/microwave/microwave
+
+/obj/item/mod/module/microwave_beam/Initialize(mapload)
+	microwave = new()
+	. = ..()
+
+/obj/item/mod/module/microwave_beam/Destroy()
+	QDEL_NULL(microwave)
+	. = ..()
+
+/obj/item/mod/module/microwave_beam/on_select_use(atom/target)
+	. = ..()
+	if(!.)
+		return
+	if(!isitem(target))
+		return
+	if(!isturf(target.loc))
+		balloon_alert(mod.wearer, "must be on the floor!")
+		return
+	var/obj/item/microwave_target = target
+	var/turf/microwave_target_loc = target.loc
+	var/datum/effect_system/spark_spread/spark_effect = new()
+	spark_effect.set_up(2, 1, mod.wearer)
+	spark_effect.start()
+	mod.wearer.Beam(target,icon_state="lightning[rand(1,12)]", time = 5)
+	if(microwave_target.microwave_act(microwave))
+		playsound(src, 'sound/machines/microwave/microwave-end.ogg', 50, FALSE)
+	else
+		balloon_alert(mod.wearer, "can't be microwaved!")
+	var/datum/effect_system/spark_spread/spark_effect_two = new()
+	spark_effect_two.set_up(2, 1, microwave_target_loc)
+	spark_effect_two.start()
+	drain_power(use_power_cost)

code/modules/mod/modules/modules_supply.dm

@@ -0,0 +1,229 @@
+//Supply modules for MODsuits
+
+///Internal GPS - Extends a GPS you can use.
+/obj/item/mod/module/gps
+	name = "MOD internal GPS module"
+	desc = "This module uses common Nanotrasen technology to calculate the user's position anywhere in space, \
+		down to the exact coordinates. This information is fed to a central database viewable from the device itself, \
+		though using it to help people is up to you."
+	icon_state = "gps"
+	module_type = MODULE_USABLE
+	complexity = 1
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 0.2
+	incompatible_modules = list(/obj/item/mod/module/gps)
+	cooldown_time = 0.5 SECONDS
+	allowed_inactive = TRUE
+
+/obj/item/mod/module/gps/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/gps/item, "MOD0", state = GLOB.deep_inventory_state, overlay_state = FALSE)
+
+/obj/item/mod/module/gps/on_use()
+	. = ..()
+	if(!.)
+		return
+	attack_self(mod.wearer)
+
+///Hydraulic Clamp - Lets you pick up and drop crates.
+/obj/item/mod/module/clamp
+	name = "MOD hydraulic clamp module"
+	desc = "A series of actuators installed into both arms of the suit, boasting a lifting capacity of almost a ton. \
+		However, this design has been locked by Nanotrasen to be primarily utilized for lifting various crates. \
+		A lot of people would say that loading cargo is a dull job, but you could not disagree more."
+	icon_state = "clamp"
+	module_type = MODULE_ACTIVE
+	complexity = 3
+	use_power_cost = DEFAULT_CHARGE_DRAIN
+	incompatible_modules = list(/obj/item/mod/module/clamp)
+	cooldown_time = 0.5 SECONDS
+	overlay_state_inactive = "module_clamp"
+	overlay_state_active = "module_clamp_on"
+	/// Time it takes to load a crate.
+	var/load_time = 3 SECONDS
+	/// The max amount of crates you can carry.
+	var/max_crates = 3
+	/// The crates stored in the module.
+	var/list/stored_crates = list()
+
+/obj/item/mod/module/clamp/on_select_use(atom/target)
+	. = ..()
+	if(!.)
+		return
+	if(!mod.wearer.Adjacent(target))
+		return
+	if(istype(target, /obj/structure/closet) || istype(target, /obj/structure/bigDelivery))
+		var/atom/movable/picked_crate = target
+		if(!check_crate_pickup(picked_crate))
+			return
+		playsound(src, 'sound/mecha/hydraulic.ogg', 25, TRUE)
+		if(!do_after(mod.wearer, load_time, target = target))
+			balloon_alert(mod.wearer, "interrupted!")
+			return
+		if(!check_crate_pickup(picked_crate))
+			return
+		stored_crates += picked_crate
+		picked_crate.forceMove(src)
+		balloon_alert(mod.wearer, "picked up [picked_crate]")
+		drain_power(use_power_cost)
+	else if(length(stored_crates))
+		var/turf/target_turf = get_turf(target)
+		if(is_blocked_turf(target_turf))
+			return
+		playsound(src, 'sound/mecha/hydraulic.ogg', 25, TRUE)
+		if(!do_after(mod.wearer, load_time, target = target))
+			balloon_alert(mod.wearer, "interrupted!")
+			return
+		if(is_blocked_turf(target_turf))
+			return
+		var/atom/movable/dropped_crate = pop(stored_crates)
+		dropped_crate.forceMove(target_turf)
+		balloon_alert(mod.wearer, "dropped [dropped_crate]")
+		drain_power(use_power_cost)
+	else
+		balloon_alert(mod.wearer, "invalid target!")
+
+/obj/item/mod/module/clamp/on_suit_deactivation(deleting = FALSE)
+	if(deleting)
+		return
+	for(var/atom/movable/crate as anything in stored_crates)
+		crate.forceMove(drop_location())
+		stored_crates -= crate
+
+/obj/item/mod/module/clamp/proc/check_crate_pickup(atom/movable/target)
+	if(length(stored_crates) >= max_crates)
+		balloon_alert(mod.wearer, "too many crates!")
+		return FALSE
+	for(var/mob/living/mob in target.GetAllContents())
+		if(mob.mob_size < MOB_SIZE_HUMAN)
+			continue
+		balloon_alert(mod.wearer, "crate too heavy!")
+		return FALSE
+	return TRUE
+
+/obj/item/mod/module/clamp/loader
+	name = "MOD loader hydraulic clamp module"
+	icon_state = "clamp_loader"
+	complexity = 0
+	removable = FALSE
+	overlay_state_inactive = null
+	overlay_state_active = "module_clamp_loader"
+	load_time = 1 SECONDS
+	max_crates = 5
+	use_mod_colors = TRUE
+
+///Drill - Lets you dig through rock and basalt.
+/obj/item/mod/module/drill // TODO: Would be cooler with a built-in drill, but meh
+	name = "MOD pickaxe/drill storage module"
+	desc = "Provides a convenient storage compartment for pickaxes and drills."
+	icon_state = "drill"
+	complexity = 2
+	incompatible_modules = list(/obj/item/mod/module/drill)
+	cooldown_time = 0.5 SECONDS
+	allowed_inactive = TRUE
+	module_type = MODULE_USABLE
+	/// Pickaxe we have stored.
+	var/obj/item/pickaxe/stored
+
+/obj/item/mod/module/drill/on_use()
+	. = ..()
+	if(!.)
+		return
+	if(!stored)
+		var/obj/item/pickaxe/holding = mod.wearer.get_active_held_item()
+		if(!holding)
+			balloon_alert(mod.wearer, "nothing to store!")
+			return
+		if(!istype(holding))
+			balloon_alert(mod.wearer, "it doesn't fit!")
+			return
+		if(mod.wearer.transferItemToLoc(holding, src, force = FALSE, silent = TRUE))
+			stored = holding
+			balloon_alert(mod.wearer, "mining instrument stored")
+			playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+	else if(mod.wearer.put_in_active_hand(stored, forced = FALSE, ignore_animation = TRUE))
+		balloon_alert(mod.wearer, "mining instrument retrieved")
+		playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+	else
+		balloon_alert(mod.wearer, "mining instrument storage full!")
+
+/obj/item/mod/module/drill/on_uninstall(deleting = FALSE)
+	if(stored)
+		stored.forceMove(drop_location())
+
+/obj/item/mod/module/drill/Exited(atom/movable/gone, direction)
+	. = ..()
+	if(gone == stored)
+		stored = null
+
+/obj/item/mod/module/drill/Destroy()
+	QDEL_NULL(stored)
+	return ..()
+
+/obj/item/mod/module/orebag // TODO
+	name = "MOD mining satchel storage module"
+	desc = "Provides a convenient storage department for a mining satchel."
+	icon_state = "ore"
+	module_type = MODULE_USABLE
+	complexity = 1
+	use_power_cost = DEFAULT_CHARGE_DRAIN * 0.2
+	incompatible_modules = list(/obj/item/mod/module/orebag)
+	cooldown_time = 0.5 SECONDS
+	allowed_inactive = TRUE
+	/// Pickaxe we have stored.
+	var/obj/item/storage/bag/ore/stored
+
+/obj/item/mod/module/orebag/on_use()
+	. = ..()
+	if(!.)
+		return
+	if(!stored)
+		var/obj/item/storage/bag/ore/holding = mod.wearer.get_active_held_item()
+		if(!holding)
+			balloon_alert(mod.wearer, "nothing to store!")
+			return
+		if(!istype(holding))
+			balloon_alert(mod.wearer, "it doesn't fit!")
+			return
+		if(mod.wearer.transferItemToLoc(holding, src, force = FALSE, silent = TRUE))
+			stored = holding
+			balloon_alert(mod.wearer, "mining satchel stored")
+			playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+			RegisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED, .proc/Pickup_ores)
+	else if(mod.wearer.put_in_active_hand(stored, forced = FALSE, ignore_animation = TRUE))
+		UnregisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED)
+		balloon_alert(mod.wearer, "mining satchel retrieved")
+		playsound(src, 'sound/weapons/revolverempty.ogg', 100, TRUE)
+	else
+		balloon_alert(mod.wearer, "mining satchel storage full!")
+
+/obj/item/mod/module/orebag/on_uninstall(deleting = FALSE)
+	if(stored)
+		UnregisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED)
+		stored.forceMove(drop_location())
+
+/obj/item/mod/module/orebag/on_equip()
+	if(stored)
+		RegisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED, .proc/Pickup_ores)
+
+/obj/item/mod/module/orebag/on_unequip()
+	if(stored)
+		UnregisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED)
+
+/obj/item/mod/module/orebag/Exited(atom/movable/gone, direction)
+	. = ..()
+	if(gone == stored)
+		UnregisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED)
+		stored = null
+
+/obj/item/mod/module/orebag/Destroy()
+	if(stored)
+		UnregisterSignal(mod.wearer, COMSIG_MOVABLE_MOVED)
+	QDEL_NULL(stored)
+	return ..()
+
+/obj/item/mod/module/orebag/proc/Pickup_ores()
+	if(stored)
+		stored.Pickup_ores(mod.wearer)
+
+// Ash accretion looks cool, but can't be arsed to implement
+// Same with sphere transformation

code/modules/mod/modules/modules_visor.dm

@@ -0,0 +1,91 @@
+//Visor modules for MODsuits
+
+///Base Visor - Adds a specific HUD and traits to you.
+/obj/item/mod/module/visor
+	name = "MOD visor module"
+	desc = "A heads-up display installed into the visor of the suit. They say these also let you see behind you."
+	module_type = MODULE_TOGGLE
+	complexity = 2
+	active_power_cost = DEFAULT_CHARGE_DRAIN * 0.3
+	incompatible_modules = list(/obj/item/mod/module/visor)
+	cooldown_time = 0.5 SECONDS
+	/// The HUD type given by the visor.
+	var/hud_type
+	/// The traits given by the visor.
+	var/list/visor_traits = list()
+
+/obj/item/mod/module/visor/on_activation()
+	. = ..()
+	if(!.)
+		return
+	if(hud_type)
+		var/datum/atom_hud/hud = GLOB.huds[hud_type]
+		hud.add_hud_to(mod.wearer)
+	for(var/trait in visor_traits)
+		ADD_TRAIT(mod.wearer, trait, MOD_TRAIT)
+	mod.wearer.update_sight()
+
+/obj/item/mod/module/visor/on_deactivation(display_message = TRUE, deleting = FALSE)
+	. = ..()
+	if(!.)
+		return
+	if(hud_type)
+		var/datum/atom_hud/hud = GLOB.huds[hud_type]
+		hud.remove_hud_from(mod.wearer)
+	for(var/trait in visor_traits)
+		REMOVE_TRAIT(mod.wearer, trait, MOD_TRAIT)
+	mod.wearer.update_sight()
+
+//Medical Visor - Gives you a medical HUD.
+/obj/item/mod/module/visor/medhud
+	name = "MOD medical visor module"
+	desc = "A heads-up display installed into the visor of the suit. This cross-references suit sensor data with a modern \
+		biological scanning suite, allowing the user to visualize the current health of organic lifeforms, as well as \
+		access data such as patient files in a convenient readout. They say these also let you see behind you."
+	icon_state = "medhud_visor"
+	hud_type = DATA_HUD_MEDICAL_ADVANCED
+
+//Diagnostic Visor - Gives you a diagnostic HUD.
+/obj/item/mod/module/visor/diaghud
+	name = "MOD diagnostic visor module"
+	desc = "A heads-up display installed into the visor of the suit. This uses a series of advanced sensors to access data \
+		from advanced machinery, exosuits, and other devices, allowing the user to visualize current power levels \
+		and integrity of such. They say these also let you see behind you."
+	icon_state = "diaghud_visor"
+	hud_type = DATA_HUD_DIAGNOSTIC_ADVANCED
+
+//Security Visor - Gives you a security HUD.
+/obj/item/mod/module/visor/sechud
+	name = "MOD security visor module"
+	desc = "A heads-up display installed into the visor of the suit. This module is a heavily-retrofitted targeting system, \
+		plugged into various criminal databases to be able to view arrest records, command simple security-oriented robots, \
+		and generally know who to shoot. They say these also let you see behind you."
+	icon_state = "sechud_visor"
+	hud_type = DATA_HUD_SECURITY_ADVANCED
+
+//Meson Visor - Gives you meson vision.
+/obj/item/mod/module/visor/meson
+	name = "MOD meson visor module"
+	desc = "A heads-up display installed into the visor of the suit. This module is based off well-loved meson scanner \
+		technology, used by construction workers and miners across the galaxy to see basic structural and terrain layouts \
+		through walls, regardless of lighting conditions. They say these also let you see behind you."
+	icon_state = "meson_visor"
+	visor_traits = list(TRAIT_MESON_VISION)
+
+//Thermal Visor - Gives you thermal vision.
+/obj/item/mod/module/visor/thermal
+	name = "MOD thermal visor module"
+	desc = "A heads-up display installed into the visor of the suit. This uses a small IR scanner to detect and identify \
+		the thermal radiation output of objects near the user. While it can detect the heat output of even something as \
+		small as a rodent, it still produces irritating red overlay. They say these also let you see behind you."
+	icon_state = "thermal_visor"
+	visor_traits = list(TRAIT_THERMAL_VISION)
+
+//Night Visor - Gives you night vision.
+/obj/item/mod/module/visor/night
+	name = "MOD night visor module"
+	desc = "A heads-up display installed into the visor of the suit. Typical for both civilian and military applications, \
+		this allows the user to perceive their surroundings while in complete darkness, enhancing the view by tenfold; \
+		yet brightening everything into a spooky green glow. They say these also let you see behind you."
+	icon_state = "night_visor"
+	visor_traits = list(TRAIT_TRUE_NIGHT_VISION)

code/modules/projectiles/projectile.dm

@@ -69,6 +69,8 @@
 	var/projectile_piercing = NONE
 	/// number of times we've pierced something. Incremented BEFORE bullet_act and on_hit proc!
 	var/pierces = 0
+	/// If objects are below this layer, we pass through them
+	var/hit_threshhold = PROJECTILE_HIT_THRESHHOLD_LAYER
 	/// "leftover" pixels for Range() calculation as pixel_move() was moved to simulated semi-pixel movement and Range() is in tiles.
 	var/pixels_range_leftover = 0
 	/// "leftover" tick pixels and stuff yeah, so we don't round off things and introducing tracing inaccuracy.
@@ -519,7 +521,7 @@
 	if(!isliving(target))
 		if(isturf(target))		// non dense turfs
 			return FALSE
-		if(target.layer < PROJECTILE_HIT_THRESHHOLD_LAYER)
+		if(target.layer < hit_threshhold)
 			return FALSE
 		else if(!direct_target)		// non dense objects do not get hit unless specifically clicked
 			return FALSE

code/modules/reagents/chemistry/holder.dm

@@ -890,6 +890,7 @@
 				R.reaction_turf(A, R.volume * volume_modifier, show_message, from_gas)
 			if("OBJ")
 				R.reaction_obj(A, R.volume * volume_modifier, show_message)
+	SEND_SIGNAL(A, COMSIG_ATOM_EXPOSE_REAGENTS, cached_reagents, src, method, volume_modifier, show_message, from_gas)
 
 /datum/reagents/proc/holder_full()
 	if(total_volume >= maximum_volume)

code/modules/research/designs/mod_designs.dm

@@ -0,0 +1,372 @@
+//MODsuit construction
+
+/datum/design/mod_shell
+	name = "MOD Shell"
+	desc = "A 'Nakamura Engineering' designed shell for a Modular Suit."
+	id = "mod_shell"
+	build_type = MECHFAB
+	materials = list(/datum/material/iron = 10000, /datum/material/plasma = 5000)
+	construction_time = 25 SECONDS
+	build_path = /obj/item/mod/construction/shell
+	category = list("MODsuit Chassis")
+
+/datum/design/mod_helmet
+	name = "MOD Helmet"
+	desc = "A 'Nakamura Engineering' designed helmet for a Modular Suit."
+	id = "mod_helmet"
+	build_type = MECHFAB
+	materials = list(/datum/material/iron = 5000)
+	construction_time = 10 SECONDS
+	build_path = /obj/item/mod/construction/helmet
+	category = list("MODsuit Chassis")
+
+/datum/design/mod_chestplate
+	name = "MOD Chestplate"
+	desc = "A 'Nakamura Engineering' designed chestplate for a Modular Suit."
+	id = "mod_chestplate"
+	build_type = MECHFAB
+	materials = list(/datum/material/iron = 5000)
+	construction_time = 10 SECONDS
+	build_path = /obj/item/mod/construction/chestplate
+	category = list("MODsuit Chassis")
+
+/datum/design/mod_gauntlets
+	name = "MOD Gauntlets"
+	desc = "'Nakamura Engineering' designed gauntlets for a Modular Suit."
+	id = "mod_gauntlets"
+	build_type = MECHFAB
+	materials = list(/datum/material/iron = 5000)
+	construction_time = 10 SECONDS
+	build_path = /obj/item/mod/construction/gauntlets
+	category = list("MODsuit Chassis")
+
+/datum/design/mod_boots
+	name = "MOD Boots"
+	desc = "'Nakamura Engineering' designed boots for a Modular Suit."
+	id = "mod_boots"
+	build_type = MECHFAB
+	materials = list(/datum/material/iron = 5000)
+	construction_time = 10 SECONDS
+	build_path = /obj/item/mod/construction/boots
+	category = list("MODsuit Chassis")
+
+/datum/design/mod_plating
+	name = "MOD External Plating"
+	desc = "External plating for a MODsuit."
+	id = "mod_plating_standard"
+	build_type = PROTOLATHE | MECHFAB
+	materials = list(/datum/material/iron = 6000, /datum/material/glass = 3000, /datum/material/plasma = 1000)
+	construction_time = 15 SECONDS
+	build_path = /obj/item/mod/construction/armor
+	category = list("MODsuit Chassis", "MODsuit Designs")
+	departmental_flags = DEPARTMENTAL_FLAG_ALL
+	research_icon = 'icons/obj/clothing/modsuit/mod_construction.dmi'
+	research_icon_state = "standard-plating"
+
+/datum/design/mod_plating/New()
+	. = ..()
+	var/obj/item/mod/construction/armor/armor_type = build_path
+	var/datum/mod_theme/theme = GLOB.mod_themes[initial(armor_type.theme)]
+	desc = "External plating for a MODsuit. [theme.desc]"
+
+/datum/design/mod_plating/engineering
+	name = "MOD Engineering Plating"
+	id = "mod_plating_engineering"
+	build_path = /obj/item/mod/construction/armor/engineering
+	materials = list(/datum/material/iron = 6000, /datum/material/gold = 2000, /datum/material/glass = 1000, /datum/material/plasma = 1000)
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+	research_icon_state = "engineering-plating"
+
+/datum/design/mod_plating/atmospheric
+	name = "MOD Atmospheric Plating"
+	id = "mod_plating_atmospheric"
+	build_path = /obj/item/mod/construction/armor/atmospheric
+	materials = list(/datum/material/iron = 6000, /datum/material/titanium = 2000, /datum/material/glass = 1000, /datum/material/plasma = 1000)
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+	research_icon_state = "atmospheric-plating"
+
+/datum/design/mod_plating/mining
+	name = "MOD Mining Plating"
+	id = "mod_plating_mining"
+	build_path = /obj/item/mod/construction/armor/mining
+	materials = list(/datum/material/iron = 6000, /datum/material/titanium = 2000, /datum/material/glass = 1000, /datum/material/plasma = 1000)
+	departmental_flags = DEPARTMENTAL_FLAG_CARGO
+	research_icon_state = "atmospheric-mining"
+
+/datum/design/mod_plating/medical
+	name = "MOD Medical Plating"
+	id = "mod_plating_medical"
+	build_path = /obj/item/mod/construction/armor/medical
+	materials = list(/datum/material/iron = 6000, /datum/material/silver = 2000, /datum/material/glass = 1000, /datum/material/plasma = 1000)
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
+	research_icon_state = "medical-plating"
+
+/datum/design/mod_plating/security
+	name = "MOD Security Plating"
+	id = "mod_plating_security"
+	build_path = /obj/item/mod/construction/armor/security
+	materials = list(/datum/material/iron = 6000, /datum/material/uranium = 2000, /datum/material/glass = 1000, /datum/material/plasma = 1000)
+	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+	research_icon_state = "security-plating"
+
+/datum/design/mod_plating/cosmohonk
+	name = "MOD Cosmohonk Plating"
+	id = "mod_plating_cosmohonk"
+	build_path = /obj/item/mod/construction/armor/cosmohonk
+	materials = list(/datum/material/iron = 6000, /datum/material/bananium = 2000, /datum/material/glass = 1000, /datum/material/plasma = 1000)
+	departmental_flags = DEPARTMENTAL_FLAG_SERVICE
+	research_icon_state = "cosmohonk-plating"
+
+/datum/design/mod_paint_kit
+	name = "MOD Paint Kit"
+	desc = "A paint kit for Modular Suits."
+	id = "mod_paint_kit"
+	build_type = MECHFAB
+	materials = list(/datum/material/iron = 1000, /datum/material/plastic = 500)
+	construction_time = 5 SECONDS
+	build_path = /obj/item/mod/paint
+	category = list("MODsuit Modules", "MODsuit Designs")
+
+//MODsuit modules
+
+/datum/design/module
+	name = "MOD Module"
+	build_type = PROTOLATHE | MECHFAB
+	construction_time = 1 SECONDS
+	materials = list(/datum/material/iron = 1000, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module
+	category = list("MODsuit Modules", "MODsuit Designs")
+	departmental_flags = DEPARTMENTAL_FLAG_ALL
+
+/datum/design/module/New()
+	. = ..()
+	var/obj/item/mod/module/module = build_path
+	desc = "[initial(module.desc)] It uses [initial(module.complexity)] complexity."
+
+/datum/design/module/mod_storage
+	name = "Storage Module"
+	id = "mod_storage"
+	materials = list(/datum/material/iron = 2500, /datum/material/glass = 500)
+	build_path = /obj/item/mod/module/storage
+
+/datum/design/module/mod_visor_medhud
+	name = "Medical Visor Module"
+	id = "mod_visor_medhud"
+	materials = list(/datum/material/silver = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/visor/medhud
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
+
+/datum/design/module/mod_visor_diaghud
+	name = "Diagnostic Visor Module"
+	id = "mod_visor_diaghud"
+	materials = list(/datum/material/gold = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/visor/diaghud
+	departmental_flags = DEPARTMENTAL_FLAG_SCIENCE
+
+/datum/design/module/mod_visor_sechud
+	name = "Security Visor Module"
+	id = "mod_visor_sechud"
+	materials = list(/datum/material/titanium = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/visor/sechud
+	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+
+/datum/design/module/mod_visor_meson
+	name = "Meson Visor Module"
+	id = "mod_visor_meson"
+	materials = list(/datum/material/uranium = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/visor/meson
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_visor_welding
+	name = "Welding Protection Module"
+	id = "mod_welding"
+	materials = list(/datum/material/iron = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/welding
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_t_ray
+	name = "T-Ray Scanner Module"
+	id = "mod_t_ray"
+	materials = list(/datum/material/iron = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/t_ray
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_health_analyzer
+	name = "Health Analyzer Module"
+	id = "mod_health_analyzer"
+	materials = list(/datum/material/iron = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/health_analyzer
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
+
+/datum/design/module/mod_stealth
+	name = "Cloak Module"
+	id = "mod_stealth"
+	materials = list(/datum/material/iron = 1000, /datum/material/bluespace = 500)
+	build_path = /obj/item/mod/module/stealth
+	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+
+/datum/design/module/mod_jetpack
+	name = "Ion Jetpack Module"
+	id = "mod_jetpack"
+	materials = list(/datum/material/iron = 1500, /datum/material/plasma = 1000)
+	build_path = /obj/item/mod/module/jetpack
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_magboot
+	name = "Magnetic Stabilizator Module"
+	id = "mod_magboot"
+	materials = list(/datum/material/iron = 1000, /datum/material/gold = 500)
+	build_path = /obj/item/mod/module/magboot
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_mag_harness
+	name = "Magnetic Harness Module"
+	id = "mod_mag_harness"
+	materials = list(/datum/material/iron = 1500, /datum/material/silver = 500)
+	build_path = /obj/item/mod/module/magnetic_harness
+	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+
+/datum/design/module/mod_tether
+	name = "Emergency Tether Module"
+	id = "mod_tether"
+	materials = list(/datum/material/iron = 1000, /datum/material/silver = 500)
+	build_path = /obj/item/mod/module/tether
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_mouthhole
+	name = "Eating Apparatus Module"
+	id = "mod_mouthhole"
+	materials = list(/datum/material/iron = 1500)
+	build_path = /obj/item/mod/module/mouthhole
+
+/datum/design/module/mod_rad_protection
+	name = "Radiation Protection Module"
+	id = "mod_rad_protection"
+	materials = list(/datum/material/iron = 1000, /datum/material/uranium = 1000)
+	build_path = /obj/item/mod/module/rad_protection
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_emp_shield
+	name = "EMP Shield Module"
+	id = "mod_emp_shield"
+	materials = list(/datum/material/iron = 1000, /datum/material/plasma = 1000)
+	build_path = /obj/item/mod/module/emp_shield
+	departmental_flags = DEPARTMENTAL_FLAG_SCIENCE
+
+/datum/design/module/mod_flashlight
+	name = "Flashlight Module"
+	id = "mod_flashlight"
+	materials = list(/datum/material/iron = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/flashlight
+
+/datum/design/module/mod_reagent_scanner
+	name = "Reagent Scanner Module"
+	id = "mod_reagent_scanner"
+	materials = list(/datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/reagent_scanner
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL | DEPARTMENTAL_FLAG_SCIENCE
+
+/datum/design/module/mod_gps
+	name = "Internal GPS Module"
+	id = "mod_gps"
+	materials = list(/datum/material/iron = 500, /datum/material/glass = 500)
+	build_path = /obj/item/mod/module/gps
+	departmental_flags = DEPARTMENTAL_FLAG_SCIENCE | DEPARTMENTAL_FLAG_ENGINEERING | DEPARTMENTAL_FLAG_CARGO
+
+/datum/design/module/mod_constructor
+	name = "Constructor Module"
+	id = "mod_constructor"
+	materials = list(/datum/material/iron = 1000, /datum/material/titanium = 500)
+	build_path = /obj/item/mod/module/constructor
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_quick_carry
+	name = "Quick Carry Module"
+	id = "mod_quick_carry"
+	materials = list(/datum/material/iron = 1000, /datum/material/titanium = 500)
+	build_path = /obj/item/mod/module/quick_carry
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
+
+/datum/design/module/mod_bikehorn
+	name = "Bike Horn Module"
+	id = "mod_bikehorn"
+	materials = list(/datum/material/plastic = 500, /datum/material/iron = 500)
+	build_path = /obj/item/mod/module/bikehorn
+	departmental_flags = DEPARTMENTAL_FLAG_SERVICE
+
+/datum/design/module/mod_microwave_beam
+	name = "Microwave Beam Module"
+	id = "mod_microwave_beam"
+	materials = list(/datum/material/iron = 1000, /datum/material/uranium = 500)
+	build_path = /obj/item/mod/module/microwave_beam
+	departmental_flags = DEPARTMENTAL_FLAG_SERVICE
+
+/datum/design/module/mod_clamp
+	name = "Crate Clamp Module"
+	id = "mod_clamp"
+	materials = list(/datum/material/iron = 2000)
+	build_path = /obj/item/mod/module/clamp
+	departmental_flags = DEPARTMENTAL_FLAG_CARGO
+
+/datum/design/module/mod_drill
+	name = "Drill Module"
+	id = "mod_drill"
+	materials = list(/datum/material/silver = 1000, /datum/material/iron = 2000)
+	build_path = /obj/item/mod/module/drill
+	departmental_flags = DEPARTMENTAL_FLAG_CARGO
+
+/datum/design/module/mod_orebag
+	name = "Ore Bag Module"
+	id = "mod_orebag"
+	materials = list(/datum/material/iron = 1500)
+	build_path = /obj/item/mod/module/orebag
+	departmental_flags = DEPARTMENTAL_FLAG_CARGO
+
+/datum/design/module/mod_dna_lock
+	name = "DNA Lock Module"
+	id = "mod_dna_lock"
+	materials = list(/datum/material/diamond = 500, /datum/material/glass = 1000)
+	build_path = /obj/item/mod/module/dna_lock
+
+/datum/design/module/mister_atmos
+	name = "Resin Mister Module"
+	id = "mod_mister_atmos"
+	materials = list(/datum/material/glass = 1000, /datum/material/titanium = 1500)
+	build_path = /obj/item/mod/module/mister/atmos
+	departmental_flags = DEPARTMENTAL_FLAG_ENGINEERING
+
+/datum/design/module/mod_holster
+	name = "Holster Module"
+	id = "mod_holster"
+	materials = list(/datum/material/iron = 1500, /datum/material/glass = 500)
+	build_path = /obj/item/mod/module/holster
+	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+
+/datum/design/module/surgicalprocessor
+	name = "Surgical Processor Module"
+	id = "mod_surgicalprocessor"
+	materials = list(/datum/material/titanium = 250, /datum/material/glass = 1000, /datum/material/silver = 1500)
+	build_path = /obj/item/mod/module/surgical_processor
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
+
+/datum/design/module/defibrillator
+	name = "Defibrillator Module"
+	id = "mod_defib"
+	materials = list(/datum/material/titanium = 250, /datum/material/diamond = 1000, /datum/material/silver = 1500)
+	build_path = /obj/item/mod/module/defibrillator
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
+
+//MODsuit anomalock modules
+/datum/design/module/mod_antigrav
+	name = "Anti-Gravity Module"
+	id = "mod_antigrav"
+	materials = list(/datum/material/iron = 2500, /datum/material/glass = 2000, /datum/material/uranium = 2000)
+	build_path = /obj/item/mod/module/anomaly_locked/antigrav
+	departmental_flags = DEPARTMENTAL_FLAG_SCIENCE
+
+/datum/design/module/mod_teleporter
+	name = "Teleporter Module"
+	id = "mod_teleporter"
+	materials = list(/datum/material/iron = 2500, /datum/material/glass = 2000, /datum/material/bluespace = 2000)
+	build_path = /obj/item/mod/module/anomaly_locked/teleporter
+	departmental_flags = DEPARTMENTAL_FLAG_SCIENCE

code/modules/research/machinery/protolathe.dm

@@ -15,7 +15,8 @@
 								"Weapons",
 								"Ammo",
 								"Firing Pins",
-								"Computer Parts"
+								"Computer Parts",
+								"MODsuit Designs"
 								)
 	production_animation = "protolathe_n"
 	allowed_buildtypes = PROTOLATHE

code/modules/research/machinery/techfab.dm

@@ -26,7 +26,8 @@
 								"Subspace Telecomms",
 								"Research Machinery",
 								"Misc. Machinery",
-								"Computer Parts"
+								"Computer Parts",
+								"MODsuit Designs"
 								)
 	console_link = FALSE
 	production_animation = "protolathe_n"

code/modules/research/techweb/nodes/mod_nodes.dm

@@ -0,0 +1,125 @@
+/datum/techweb_node/mod_basic
+	id = "mod"
+	starting_node = TRUE
+	display_name = "Basic Modular Suits"
+	description = "Specialized back mounted power suits with various different modules."
+	design_ids = list(
+		"mod_shell",
+		"mod_helmet",
+		"mod_chestplate",
+		"mod_gauntlets",
+		"mod_boots",
+		"mod_plating_standard",
+		"mod_paint_kit",
+		"mod_storage",
+		"mod_welding",
+		"mod_mouthhole",
+		"mod_flashlight",
+	)
+
+/datum/techweb_node/mod_advanced
+	id = "mod_advanced"
+	display_name = "Advanced Modular Suits"
+	description = "More advanced modules, to improve modular suits."
+	prereq_ids = list("mod", "robotics")
+	design_ids = list(
+		"mod_plating_mining",
+		"mod_visor_diaghud",
+		"mod_gps",
+		"mod_reagent_scanner",
+		"mod_clamp",
+		"mod_drill",
+		"mod_orebag",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)
+
+/datum/techweb_node/mod_engineering
+	id = "mod_engineering"
+	display_name = "Engineering Modular Suits"
+	description = "Engineering suits, for powered engineers."
+	prereq_ids = list("mod_advanced", "engineering")
+	design_ids = list(
+		"mod_plating_engineering",
+		"mod_visor_meson",
+		"mod_t_ray",
+		"mod_magboot",
+		"mod_tether",
+		"mod_constructor",
+		"mod_mister_atmos",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)
+
+/datum/techweb_node/mod_advanced_engineering
+	id = "mod_advanced_engineering"
+	display_name = "Advanced Engineering Modular Suits"
+	description = "Advanced Engineering suits, for advanced powered engineers."
+	prereq_ids = list("mod_engineering", "adv_engi")
+	design_ids = list(
+		"mod_plating_atmospheric",
+		"mod_jetpack",
+		"mod_rad_protection",
+		"mod_emp_shield",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 3500)
+
+/datum/techweb_node/mod_medical
+	id = "mod_medical"
+	display_name = "Medical Modular Suits"
+	description = "Medical suits for quick rescue purposes."
+	prereq_ids = list("mod_advanced", "biotech")
+	design_ids = list(
+		"mod_plating_medical",
+		"mod_visor_medhud",
+		"mod_health_analyzer",
+		"mod_quick_carry",
+		"mod_dna_lock",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)
+
+/datum/techweb_node/mod_advanced_medical
+	id = "mod_advanced_medical"
+	display_name = "Advanced Medical Modular Suits"
+	description = "Advanced medical suits for quicker rescue purposes."
+	prereq_ids = list("mod_medical", "adv_biotech")
+	design_ids = list(
+		"mod_defib",
+		"mod_surgicalprocessor",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 3500)
+
+/datum/techweb_node/mod_security
+	id = "mod_security"
+	display_name = "Security Modular Suits"
+	description = "Security suits for space crime handling."
+	prereq_ids = list("mod_advanced", "sec_basic")
+	design_ids = list(
+		"mod_plating_security",
+		"mod_visor_sechud",
+		"mod_stealth",
+		"mod_mag_harness",
+		"mod_holster",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)
+
+/datum/techweb_node/mod_entertainment
+	id = "mod_entertainment"
+	display_name = "Entertainment Modular Suits"
+	description = "Powered suits for protection against low-humor environments."
+	prereq_ids = list("mod_advanced", "clown")
+	design_ids = list(
+		"mod_plating_cosmohonk",
+		"mod_bikehorn",
+		"mod_microwave_beam",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)
+
+/datum/techweb_node/mod_anomaly
+	id = "mod_anomaly"
+	display_name = "Anomalock Modular Suits"
+	description = "Modules for modular suits that require anomaly cores to function."
+	prereq_ids = list("mod_advanced", "anomaly_research")
+	design_ids = list(
+		"mod_antigrav",
+		"mod_teleporter",
+	)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = 2500)

code/modules/surgery/surgery.dm

@@ -68,6 +68,15 @@
 		var/obj/item/surgical_processor/SP = locate() in R.module.modules
 		if(SP)
 			advanced_surgeries |= SP.advanced_surgeries
+	else
+		var/obj/item/surgical_processor/SP
+		for(var/obj/item/surgical_processor/processor in user.held_items)
+			SP = processor
+			break
+		if(!SP)
+			SP = locate(/obj/item/surgical_processor) in get_turf(user)
+		if(SP)
+			advanced_surgeries |= SP.advanced_surgeries
 
 	var/turf/T = get_turf(patient)
 	var/obj/structure/table/optable/table = locate(/obj/structure/table/optable, T)

code/modules/vehicles/mecha/_mecha.dm

@@ -817,7 +817,7 @@
 			mecha_flags  &= ~SILICON_PILOT
 			AI.forceMove(card)
 			card.AI = AI
-			AI.controlled_mech = null
+			AI.controlled_equipment = null
 			AI.remote_control = null
 			to_chat(AI, "<span class='notice'>You have been downloaded to a mobile storage device. Wireless connection offline.</span>")
 			to_chat(user, "<span class='boldnotice'>Transfer successful</span>: [AI.name] ([rand(1000,9999)].exe) removed from [name] and stored within local memory.")
@@ -856,7 +856,7 @@
 	mecha_flags |= SILICON_PILOT
 	moved_inside(AI)
 	AI.cancel_camera()
-	AI.controlled_mech = src
+	AI.controlled_equipment = src
 	AI.remote_control = src
 	AI.mobility_flags = ALL //Much easier than adding AI checks! Be sure to set this back to 0 if you decide to allow an AI to leave a mech somehow.
 	if(interaction == AI_MECH_HACK)
@@ -1083,7 +1083,7 @@
 				AI.linked_core = null
 				return
 			to_chat(AI, "<span class='notice'>Returning to core...</span>")
-			AI.controlled_mech = null
+			AI.controlled_equipment = null
 			AI.remote_control = null
 			mob_container = AI
 			newloc = get_turf(AI.linked_core)

code/modules/vehicles/mecha/mech_fabricator.dm

@@ -57,6 +57,8 @@
 								"Exosuit Equipment",
 								"Exosuit Ammunition",
 								"Cyborg Upgrade Modules",
+								"MODsuit Chassis",
+								"MODsuit Modules",
 								"Cybernetics",
 								"Implants",
 								"Control Interfaces",

code/modules/vehicles/mecha/mecha_wreckage.dm

@@ -35,7 +35,7 @@
 	AI.death() //The damage is not enough to kill the AI, but to be 'corrupted files' in need of repair.
 	AI.forceMove(src) //Put the dead AI inside the wreckage for recovery
 	add_overlay(mutable_appearance('icons/obj/projectiles.dmi', "green_laser")) //Overlay for the recovery beacon
-	AI.controlled_mech = null
+	AI.controlled_equipment = null
 	AI.remote_control = null
 
 /obj/structure/mecha_wreckage/Destroy()

tgstation.dme

@@ -80,6 +80,7 @@
 #include "code\__DEFINES\menu.dm"
 #include "code\__DEFINES\misc.dm"
 #include "code\__DEFINES\mobs.dm"
+#include "code\__DEFINES\mod.dm"
 #include "code\__DEFINES\monkeys.dm"
 #include "code\__DEFINES\move_force.dm"
 #include "code\__DEFINES\movement.dm"
@@ -159,6 +160,9 @@
 #include "code\__DEFINES\dcs\signals.dm"
 #include "code\__DEFINES\dcs\signals\signals_painting.dm"
 #include "code\__DEFINES\dcs\signals\signals_screentips.dm"
+#include "code\__DEFINES\dcs\signals\signals_medical.dm"
+#include "code\__DEFINES\dcs\signals\signals_mod.dm"
+#include "code\__DEFINES\dcs\signals\signals_reagent.dm"
 #include "code\__DEFINES\dcs\signals\signals_subsystem.dm"
 #include "code\__DEFINES\dcs\signals\signals_atom\signals_atom_movement.dm"
 #include "code\__DEFINES\dcs\signals\signals_mob\signals_mob_living.dm"
@@ -819,6 +823,7 @@
 #include "code\datums\wires\emitter.dm"
 #include "code\datums\wires\explosive.dm"
 #include "code\datums\wires\microwave.dm"
+#include "code\datums\wires\mod.dm"
 #include "code\datums\wires\mulebot.dm"
 #include "code\datums\wires\particle_accelerator.dm"
 #include "code\datums\wires\r_n_d.dm"
@@ -2968,6 +2973,27 @@
 #include "code\modules\mob\living\simple_animal\slime\slime.dm"
 #include "code\modules\mob\living\simple_animal\slime\slime_mobility.dm"
 #include "code\modules\mob\living\simple_animal\slime\subtypes.dm"
+#include "code\modules\mod\mod_actions.dm"
+#include "code\modules\mod\mod_activation.dm"
+#include "code\modules\mod\mod_ai.dm"
+#include "code\modules\mod\mod_clothes.dm"
+#include "code\modules\mod\mod_construction.dm"
+#include "code\modules\mod\mod_control.dm"
+#include "code\modules\mod\mod_paint.dm"
+#include "code\modules\mod\mod_theme.dm"
+#include "code\modules\mod\mod_types.dm"
+#include "code\modules\mod\mod_ui.dm"
+#include "code\modules\mod\modules\_module.dm"
+#include "code\modules\mod\modules\modules.dm"
+#include "code\modules\mod\modules\modules_engineering.dm"
+#include "code\modules\mod\modules\modules_general.dm"
+#include "code\modules\mod\modules\modules_maint.dm"
+#include "code\modules\mod\modules\modules_medical.dm"
+#include "code\modules\mod\modules\modules_science.dm"
+#include "code\modules\mod\modules\modules_security.dm"
+#include "code\modules\mod\modules\modules_service.dm"
+#include "code\modules\mod\modules\modules_supply.dm"
+#include "code\modules\mod\modules\modules_visor.dm"
 #include "code\modules\modular_computers\laptop_vendor.dm"
 #include "code\modules\modular_computers\computers\_modular_computer_shared.dm"
 #include "code\modules\modular_computers\computers\item\computer.dm"
@@ -3381,6 +3407,7 @@
 #include "code\modules\research\designs\medical_designs.dm"
 #include "code\modules\research\designs\mining_designs.dm"
 #include "code\modules\research\designs\misc_designs.dm"
+#include "code\modules\research\designs\mod_designs.dm"
 #include "code\modules\research\designs\nanite_designs.dm"
 #include "code\modules\research\designs\power_designs.dm"
 #include "code\modules\research\designs\smelting_designs.dm"
@@ -3450,6 +3477,7 @@
 #include "code\modules\research\techweb\nodes\mecha_nodes.dm"
 #include "code\modules\research\techweb\nodes\medical_nodes.dm"
 #include "code\modules\research\techweb\nodes\misc_nodes.dm"
+#include "code\modules\research\techweb\nodes\mod_nodes.dm"
 #include "code\modules\research\techweb\nodes\nanites_nodes.dm"
 #include "code\modules\research\techweb\nodes\robotics_nodes.dm"
 #include "code\modules\research\techweb\nodes\syndicate_nodes.dm"

tgui/packages/tgui/interfaces/MODpaint.js

@@ -0,0 +1,151 @@
+import { useBackend } from '../backend';
+import { Box, Stack, Section, ByondUi, Slider, Flex, Button } from '../components';
+import { Window } from '../layouts';
+import { capitalize } from 'common/string';
+
+const colorToMatrix = (param) => {
+  switch (param) {
+    case 'red':
+      return [
+        1, 0, 0, 0, 0.25, 0.5, 0, 0, 0.25, 0, 0.5, 0, 0, 0, 0, 1, 0, 0, 0, 0,
+      ];
+    case 'yellow':
+      return [
+        0.5, 0.5, 0, 0, 0.5, 0.5, 0, 0, 0.25, 0.25, 0.5, 0, 0, 0, 0, 1, 0, 0, 0,
+        0,
+      ];
+    case 'green':
+      return [
+        0.5, 0.25, 0, 0, 0, 1, 0, 0, 0, 0.25, 0.5, 0, 0, 0, 0, 1, 0, 0, 0, 0,
+      ];
+    case 'teal':
+      return [
+        0.25, 0.25, 0.25, 0, 0, 0.5, 0.5, 0, 0, 0.5, 0.5, 0, 0, 0, 0, 1, 0, 0,
+        0, 0,
+      ];
+    case 'blue':
+      return [
+        0.25, 0, 0.25, 0, 0, 0.5, 0.25, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0,
+      ];
+    case 'purple':
+      return [
+        0.5, 0, 0.5, 0, 0.25, 0.5, 0.25, 0, 0.5, 0, 0.5, 0, 0, 0, 0, 1, 0, 0, 0,
+        0,
+      ];
+  }
+};
+
+const displayText = (param) => {
+  switch (param) {
+    case 'r':
+      return 'Red';
+    case 'g':
+      return 'Green';
+    case 'b':
+      return 'Blue';
+  }
+};
+
+export const MODpaint = (props, context) => {
+  const { act, data } = useBackend(context);
+  const { mapRef, currentColor } = data;
+  const [
+    [rr, rg, rb, ra],
+    [gr, gg, gb, ga],
+    [br, bg, bb, ba],
+    [ar, ag, ab, aa],
+    [cr, cg, cb, ca],
+  ] = currentColor;
+  const presets = ['red', 'yellow', 'green', 'teal', 'blue', 'purple'];
+  const prefixes = ['r', 'g', 'b'];
+  return (
+    <Window width={600} height={365}>
+      <Window.Content>
+        <Stack fill>
+          <Stack.Item fill width="30%">
+            {[0, 1, 2].map((row) => (
+              <Section
+                key={row}
+                title={`${displayText(prefixes[row])} turns to:`}>
+                {[0, 1, 2].map((col) => (
+                  <Flex key={col}>
+                    <Flex.Item align="left" width="30%">
+                      <Box inline textColor="label">
+                        {`${displayText(prefixes[col])}:`}
+                      </Box>
+                    </Flex.Item>
+                    <Flex.Item align="right" width="70%">
+                      <Slider
+                        inline
+                        textAlign="right"
+                        value={currentColor[row * 4 + col] * 100}
+                        minValue={0}
+                        maxValue={125}
+                        step={1}
+                        stepPixelSize={0.75}
+                        format={(value) => `${value}%`}
+                        onDrag={(e, value) => {
+                          let retColor = currentColor;
+                          retColor[row * 4 + col] = value / 100;
+                          act('transition_color', { color: retColor });
+                        }}
+                      />
+                    </Flex.Item>
+                  </Flex>
+                ))}
+              </Section>
+            ))}
+          </Stack.Item>
+          <Stack.Item width="25%">
+            <Section height="70%" title="Presets">
+              <Box textAlign="center">
+                {presets.map((preset) => (
+                  <Button
+                    key={preset}
+                    height="50px"
+                    width="50px"
+                    color={preset}
+                    tooltipPosition="top"
+                    tooltip={capitalize(preset)}
+                    onClick={() =>
+                      act('transition_color', { color: colorToMatrix(preset) })}
+                  />
+                ))}
+              </Box>
+            </Section>
+            <Section textAlign="center" fontSize="28px">
+              <Button
+                height="50px"
+                width="50px"
+                icon="question"
+                color="average"
+                tooltipPosition="top"
+                tooltip="This is a color matrix. Think of it as editing the image in 3 layers, red, green, and blue, rather than editing the final image like with RGB."
+              />
+              <Button
+                height="50px"
+                width="50px"
+                icon="check"
+                color="good"
+                tooltipPosition="top"
+                tooltip="Confirm changes!"
+                onClick={() => act('confirm')}
+              />
+            </Section>
+          </Stack.Item>
+          <Stack.Item width="45%">
+            <Section fill title="Preview">
+              <ByondUi
+                height="230px"
+                params={{
+                  id: mapRef,
+                  type: 'map',
+                }}
+              />
+            </Section>
+          </Stack.Item>
+        </Stack>
+      </Window.Content>
+    </Window>
+  );
+};

tgui/packages/tgui/interfaces/MODsuit.js

@@ -0,0 +1,754 @@
+import { useBackend, useLocalState } from '../backend';
+import { Button, ColorBox, LabeledList, ProgressBar, Section, Collapsible, Box, Icon, Stack, Table, Dimmer, NumberInput, Flex, AnimatedNumber, Dropdown } from '../components';
+import { Window } from '../layouts';
+
+const ConfigureNumberEntry = (props, context) => {
+  const { name, value, module_ref } = props;
+  const { act } = useBackend(context);
+  return (
+    <NumberInput
+      value={value}
+      minValue={-50}
+      maxValue={50}
+      stepPixelSize={5}
+      width="39px"
+      onChange={(e, value) =>
+        act('configure', {
+          'key': name,
+          'value': value,
+          'ref': module_ref,
+        })}
+    />
+  );
+};
+
+const ConfigureBoolEntry = (props, context) => {
+  const { name, value, module_ref } = props;
+  const { act } = useBackend(context);
+  return (
+    <Button.Checkbox
+      checked={value}
+      onClick={() =>
+        act('configure', {
+          'key': name,
+          'value': !value,
+          'ref': module_ref,
+        })}
+    />
+  );
+};
+
+const ConfigureColorEntry = (props, context) => {
+  const { name, value, module_ref } = props;
+  const { act } = useBackend(context);
+  return (
+    <>
+      <Button
+        icon="paint-brush"
+        onClick={() =>
+          act('configure', {
+            'key': name,
+            'ref': module_ref,
+          })}
+      />
+      <ColorBox color={value} mr={0.5} />
+    </>
+  );
+};
+
+const ConfigureListEntry = (props, context) => {
+  const { name, value, values, module_ref } = props;
+  const { act } = useBackend(context);
+  return (
+    <Dropdown
+      displayText={value}
+      options={values}
+      onSelected={(value) =>
+        act('configure', {
+          'key': name,
+          'value': value,
+          'ref': module_ref,
+        })}
+    />
+  );
+};
+
+const ConfigureDataEntry = (props, context) => {
+  const { name, display_name, type, value, values, module_ref } = props;
+  const configureEntryTypes = {
+    number: <ConfigureNumberEntry {...props} />,
+    bool: <ConfigureBoolEntry {...props} />,
+    color: <ConfigureColorEntry {...props} />,
+    list: <ConfigureListEntry {...props} />,
+  };
+  return (
+    <Box>
+      {display_name}: {configureEntryTypes[type]}
+    </Box>
+  );
+};
+
+const RadCounter = (props, context) => {
+  const { active, userradiated, usertoxins, usermaxtoxins, threatlevel }
+    = props;
+  return (
+    <Stack fill textAlign="center">
+      <Stack.Item grow>
+        <Section
+          title="Radiation Level"
+          color={active && userradiated ? 'bad' : 'good'}>
+          {active && userradiated ? 'IRRADIATED' : 'RADIATION-FREE'}
+        </Section>
+      </Stack.Item>
+      <Stack.Item grow>
+        <Section title="Toxins Level">
+          <ProgressBar
+            value={active ? usertoxins / usermaxtoxins : 0}
+            ranges={{
+              good: [-Infinity, 0.2],
+              average: [0.2, 0.5],
+              bad: [0.5, Infinity],
+            }}>
+            <AnimatedNumber value={usertoxins} />
+          </ProgressBar>
+        </Section>
+      </Stack.Item>
+      <Stack.Item grow>
+        <Section
+          title="Hazard Level"
+          color={active && threatlevel ? 'bad' : 'good'}
+          bold>
+          {active && threatlevel ? threatlevel : 0}
+        </Section>
+      </Stack.Item>
+    </Stack>
+  );
+};
+
+const HealthAnalyzer = (props, context) => {
+  const {
+    active,
+    userhealth,
+    usermaxhealth,
+    userbrute,
+    userburn,
+    usertoxin,
+    useroxy,
+  } = props;
+  return (
+    <>
+      <Section title="Health">
+        <ProgressBar
+          value={active ? userhealth / usermaxhealth : 0}
+          ranges={{
+            good: [0.5, Infinity],
+            average: [0.2, 0.5],
+            bad: [-Infinity, 0.2],
+          }}>
+          <AnimatedNumber value={active ? userhealth : 0} />
+        </ProgressBar>
+      </Section>
+      <Stack textAlign="center">
+        <Stack.Item grow>
+          <Section title="Brute">
+            <ProgressBar
+              value={active ? userbrute / usermaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={active ? userbrute : 0} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Burn">
+            <ProgressBar
+              value={active ? userburn / usermaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={active ? userburn : 0} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Toxin">
+            <ProgressBar
+              value={active ? usertoxin / usermaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={active ? usertoxin : 0} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Suffocation">
+            <ProgressBar
+              value={active ? useroxy / usermaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={active ? useroxy : 0} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+      </Stack>
+    </>
+  );
+};
+
+const StatusReadout = (props, context) => {
+  const {
+    active,
+    statustime,
+    statusid,
+    statushealth,
+    statusmaxhealth,
+    statusbrute,
+    statusburn,
+    statustoxin,
+    statusoxy,
+    statustemp,
+    statusnutrition,
+    statusfingerprints,
+    statusdna,
+    statusviruses,
+  } = props;
+  return (
+    <>
+      <Stack textAlign="center">
+        <Stack.Item grow>
+          <Section title="Operation Time">
+            {active ? statustime : '00:00:00'}
+          </Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Operation Number">
+            {active ? statusid || '0' : '???'}
+          </Section>
+        </Stack.Item>
+      </Stack>
+      <Section title="Health">
+        <ProgressBar
+          value={active ? statushealth / statusmaxhealth : 0}
+          ranges={{
+            good: [0.5, Infinity],
+            average: [0.2, 0.5],
+            bad: [-Infinity, 0.2],
+          }}>
+          <AnimatedNumber value={active ? statushealth : 0} />
+        </ProgressBar>
+      </Section>
+      <Stack textAlign="center">
+        <Stack.Item grow>
+          <Section title="Brute">
+            <ProgressBar
+              value={active ? statusbrute / statusmaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={active ? statusbrute : 0} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Burn">
+            <ProgressBar
+              value={active ? statusburn / statusmaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={active ? statusburn : 0} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Toxin">
+            <ProgressBar
+              value={active ? statustoxin / statusmaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={statustoxin} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Suffocation">
+            <ProgressBar
+              value={active ? statusoxy / statusmaxhealth : 0}
+              ranges={{
+                good: [-Infinity, 0.2],
+                average: [0.2, 0.5],
+                bad: [0.5, Infinity],
+              }}>
+              <AnimatedNumber value={statusoxy} />
+            </ProgressBar>
+          </Section>
+        </Stack.Item>
+      </Stack>
+      <Stack textAlign="center">
+        <Stack.Item grow>
+          <Section title="Body Temperature">{active ? statustemp : 0}</Section>
+        </Stack.Item>
+        <Stack.Item grow>
+          <Section title="Nutrition Status">
+            {active ? statusnutrition : 0}
+          </Section>
+        </Stack.Item>
+      </Stack>
+      <Section title="DNA">
+        <LabeledList>
+          <LabeledList.Item label="Fingerprints">
+            {active ? statusfingerprints : '???'}
+          </LabeledList.Item>
+          <LabeledList.Item label="Unique Enzymes">
+            {active ? statusdna : '???'}
+          </LabeledList.Item>
+        </LabeledList>
+      </Section>
+      {!!active && !!statusviruses && (
+        <Section title="Diseases">
+          <Table>
+            <Table.Row header>
+              <Table.Cell textAlign="center">
+                <Button
+                  color="transparent"
+                  icon="signature"
+                  tooltip="Name"
+                  tooltipPosition="top"
+                />
+              </Table.Cell>
+              <Table.Cell textAlign="center">
+                <Button
+                  color="transparent"
+                  icon="wind"
+                  tooltip="Type"
+                  tooltipPosition="top"
+                />
+              </Table.Cell>
+              <Table.Cell textAlign="center">
+                <Button
+                  color="transparent"
+                  icon="bolt"
+                  tooltip="Stage"
+                  tooltipPosition="top"
+                />
+              </Table.Cell>
+              <Table.Cell textAlign="center">
+                <Button
+                  color="transparent"
+                  icon="flask"
+                  tooltip="Cure"
+                  tooltipPosition="top"
+                />
+              </Table.Cell>
+            </Table.Row>
+            {statusviruses.map((virus) => {
+              return (
+                <Table.Row key={virus.name}>
+                  <Table.Cell textAlign="center">{virus.name}</Table.Cell>
+                  <Table.Cell textAlign="center">{virus.type}</Table.Cell>
+                  <Table.Cell textAlign="center">
+                    {virus.stage}/{virus.maxstage}
+                  </Table.Cell>
+                  <Table.Cell textAlign="center">{virus.cure}</Table.Cell>
+                </Table.Row>
+              );
+            })}
+          </Table>
+        </Section>
+      )}
+    </>
+  );
+};
+
+const ID2MODULE = {
+  rad_counter: RadCounter,
+  health_analyzer: HealthAnalyzer,
+  status_readout: StatusReadout,
+};
+
+const LockedInterface = () => (
+  <Section align="center" fill>
+    <Icon color="red" name="exclamation-triangle" size={15} />
+    <Box fontSize="30px" color="red">
+      ERROR: INTERFACE UNRESPONSIVE
+    </Box>
+  </Section>
+);
+
+const LockedModule = (props, context) => {
+  const { act, data } = useBackend(context);
+  return (
+    <Dimmer>
+      <Stack>
+        <Stack.Item fontSize="16px" color="blue">
+          SUIT UNPOWERED
+        </Stack.Item>
+      </Stack>
+    </Dimmer>
+  );
+};
+
+const ConfigureScreen = (props, context) => {
+  const { configuration_data, module_ref } = props;
+  const configuration_keys = Object.keys(configuration_data);
+  return (
+    <Dimmer backgroundColor="rgba(0, 0, 0, 0.8)">
+      <Stack vertical>
+        {configuration_keys.map((key) => {
+          const data = configuration_data[key];
+          return (
+            <Stack.Item key={data.key}>
+              <ConfigureDataEntry
+                name={key}
+                display_name={data.display_name}
+                type={data.type}
+                value={data.value}
+                values={data.values}
+                module_ref={module_ref}
+              />
+            </Stack.Item>
+          );
+        })}
+        <Stack.Item>
+          <Box>
+            <Button
+              fluid
+              onClick={props.onExit}
+              icon="times"
+              textAlign="center">
+              Exit
+            </Button>
+          </Box>
+        </Stack.Item>
+      </Stack>
+    </Dimmer>
+  );
+};
+
+const displayText = (param) => {
+  switch (param) {
+    case 1:
+      return 'Use';
+    case 2:
+      return 'Toggle';
+    case 3:
+      return 'Select';
+  }
+};
+
+const ParametersSection = (props, context) => {
+  const { act, data } = useBackend(context);
+  const {
+    active,
+    malfunctioning,
+    open,
+    selected_module,
+    complexity,
+    complexity_max,
+    wearer_name,
+    wearer_job,
+    AI,
+    is_pAI,
+    is_user_AI,
+  } = data;
+  const status = malfunctioning
+    ? 'Malfunctioning'
+    : active
+      ? 'Active'
+      : 'Inactive';
+  return (
+    <Section title="Parameters">
+      <LabeledList>
+        <LabeledList.Item
+          label="Status"
+          buttons={
+            <Button
+              icon="power-off"
+              content={active ? 'Deactivate' : 'Activate'}
+              onClick={() => act('activate')}
+            />
+          }>
+          {status}
+        </LabeledList.Item>
+        <LabeledList.Item label="Cover">
+          {open ? 'Open' : 'Closed'}
+        </LabeledList.Item>
+        <LabeledList.Item label="Selected Module">
+          {selected_module || 'None'}
+        </LabeledList.Item>
+        <LabeledList.Item label="Complexity">
+          {complexity} ({complexity_max})
+        </LabeledList.Item>
+        <LabeledList.Item label="Occupant">
+          {wearer_name}, {wearer_job}
+        </LabeledList.Item>
+        <LabeledList.Item
+          label="Onboard AI"
+          buttons={
+            AI && is_pAI && !is_user_AI ? (
+              <Button
+                icon="eject"
+                content="Eject pAI"
+                onClick={() => act('remove_pai')}
+              />
+            ) : (<> </>)
+          }>
+          {AI || 'None'}
+        </LabeledList.Item>
+      </LabeledList>
+    </Section>
+  );
+};
+
+const HardwareSection = (props, context) => {
+  const { act, data } = useBackend(context);
+  const {
+    active,
+    control,
+    helmet,
+    chestplate,
+    gauntlets,
+    boots,
+    cell,
+    charge,
+  } = data;
+  return (
+    <Section title="Hardware">
+      <Collapsible title="Parts">
+        <LabeledList>
+          <LabeledList.Item label="Control Unit">{control}</LabeledList.Item>
+          <LabeledList.Item label="Helmet">{helmet || 'None'}</LabeledList.Item>
+          <LabeledList.Item label="Chestplate">
+            {chestplate || 'None'}
+          </LabeledList.Item>
+          <LabeledList.Item label="Gauntlets">
+            {gauntlets || 'None'}
+          </LabeledList.Item>
+          <LabeledList.Item label="Boots">{boots || 'None'}</LabeledList.Item>
+        </LabeledList>
+      </Collapsible>
+      <Collapsible title="Cell">
+        {(cell && (
+          <LabeledList>
+            <LabeledList.Item label="Cell Type">{cell}</LabeledList.Item>
+            <LabeledList.Item label="Cell Charge">
+              <ProgressBar
+                value={charge / 100}
+                content={charge + '%'}
+                ranges={{
+                  good: [0.6, Infinity],
+                  average: [0.3, 0.6],
+                  bad: [-Infinity, 0.3],
+                }}
+              />
+            </LabeledList.Item>
+          </LabeledList>
+        )) || (
+          <Box color="bad" textAlign="center">
+            No Cell Detected
+          </Box>
+        )}
+      </Collapsible>
+    </Section>
+  );
+};
+
+const InfoSection = (props, context) => {
+  const { act, data } = useBackend(context);
+  const { active, modules } = data;
+  const info_modules = modules.filter((module) => !!module.id);
+
+  return (
+    <Section title="Info">
+      <Stack vertical>
+        {(info_modules.length !== 0
+          && info_modules.map((module) => {
+            const Module = ID2MODULE[module.id];
+            return (
+              <Stack.Item key={module.ref}>
+                {!active && <LockedModule />}
+                <Module {...module} active={active} />
+              </Stack.Item>
+            );
+          })) || <Box textAlign="center">No Info Modules Detected</Box>}
+      </Stack>
+    </Section>
+  );
+};
+
+const ModuleSection = (props, context) => {
+  const { act, data } = useBackend(context);
+  const { complexity_max, modules } = data;
+  const [configureState, setConfigureState] = useLocalState(
+    context,
+    'module_configuration',
+    null
+  );
+  return (
+    <Section title="Modules" fill>
+      <Flex direction="column">
+        {(modules.length !== 0
+          && modules.map((module) => {
+            return (
+              <Flex.Item key={module.ref}>
+                <Collapsible title={module.name}>
+                  <Section>
+                    {configureState === module.ref && (
+                      <ConfigureScreen
+                        configuration_data={module.configuration_data}
+                        module_ref={module.ref}
+                        onExit={() => setConfigureState(null)}
+                      />
+                    )}
+                    <Table>
+                      <Table.Row header>
+                        <Table.Cell textAlign="center">
+                          <Button
+                            color="transparent"
+                            icon="save"
+                            tooltip="Complexity"
+                            tooltipPosition="top"
+                          />
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          <Button
+                            color="transparent"
+                            icon="plug"
+                            tooltip="Idle Power Cost"
+                            tooltipPosition="top"
+                          />
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          <Button
+                            color="transparent"
+                            icon="lightbulb"
+                            tooltip="Active Power Cost"
+                            tooltipPosition="top"
+                          />
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          <Button
+                            color="transparent"
+                            icon="bolt"
+                            tooltip="Use Power Cost"
+                            tooltipPosition="top"
+                          />
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          <Button
+                            color="transparent"
+                            icon="hourglass-half"
+                            tooltip="Cooldown"
+                            tooltipPosition="top"
+                          />
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          <Button
+                            color="transparent"
+                            icon="tasks"
+                            tooltip="Actions"
+                            tooltipPosition="top"
+                          />
+                        </Table.Cell>
+                      </Table.Row>
+                      <Table.Row>
+                        <Table.Cell textAlign="center">
+                          {module.complexity}/{complexity_max}
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          {module.idle_power}
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          {module.active_power}
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          {module.use_power}
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          {(module.cooldown > 0 && module.cooldown / 10) || '0'}
+                          /{module.cooldown_time / 10}s
+                        </Table.Cell>
+                        <Table.Cell textAlign="center">
+                          <Button
+                            onClick={() => act('select', { 'ref': module.ref })}
+                            icon="bullseye"
+                            selected={module.active}
+                            tooltip={displayText(module.module_type)}
+                            tooltipPosition="left"
+                            disabled={!module.module_type}
+                          />
+                          <Button
+                            onClick={() => setConfigureState(module.ref)}
+                            icon="cog"
+                            selected={configureState === module.ref}
+                            tooltip="Configure"
+                            tooltipPosition="left"
+                            disabled={module.configuration_data.length === 0}
+                          />
+                        </Table.Cell>
+                      </Table.Row>
+                    </Table>
+                    <Box>{module.description}</Box>
+                  </Section>
+                </Collapsible>
+              </Flex.Item>
+            );
+          })) || (
+          <Flex.Item>
+            <Box textAlign="center">No Modules Detected</Box>
+          </Flex.Item>
+        )}
+      </Flex>
+    </Section>
+  );
+};
+
+export const MODsuit = (props, context) => {
+  const { act, data } = useBackend(context);
+  const { ui_theme, interface_break } = data;
+  return (
+    <Window
+      width={400}
+      height={525}
+      theme={ui_theme}
+      title="MOD Interface Panel"
+      resizable>
+      <Window.Content scrollable={!interface_break}>
+        {(!!interface_break && <LockedInterface />) || (
+          <Stack vertical fill>
+            <Stack.Item>
+              <ParametersSection />
+            </Stack.Item>
+            <Stack.Item>
+              <HardwareSection />
+            </Stack.Item>
+            <Stack.Item>
+              <InfoSection />
+            </Stack.Item>
+            <Stack.Item grow>
+              <ModuleSection />
+            </Stack.Item>
+          </Stack>
+        )}
+      </Window.Content>
+    </Window>
+  );
+};

tgui/packages/tgui/interfaces/SuitStorageUnit.js

@@ -14,6 +14,7 @@ export const SuitStorageUnit = (props, context) => {
     suit,
     helmet,
     mask,
+    mod,
     storage,
   } = data;
   return (
@@ -89,6 +90,15 @@ export const SuitStorageUnit = (props, context) => {
                       item: 'mask',
                     })} />
                 </LabeledList.Item>
+                <LabeledList.Item label="MOD">
+                  <Button
+                    icon={mod ? 'square' : 'square-o'}
+                    content={mod || 'Empty'}
+                    disabled={!mod}
+                    onClick={() => act('dispense', {
+                      item: 'mod',
+                    })} />
+                </LabeledList.Item>
                 <LabeledList.Item label="Storage">
                   <Button
                     icon={storage ? 'square' : 'square-o'}