modsuits part 2

code/datums/ai/objects/mod.dm

@@ -1,48 +0,0 @@
-/// An AI controller for the MODsuit pathfinder module. It's activated by implant and attaches itself to the user.
-/datum/ai_controller/mod
-	blackboard = list(
-		BB_MOD_TARGET,
-		BB_MOD_IMPLANT,
-	)
-	max_target_distance = MOD_AI_RANGE //a little spicy but its one specific item that summons it, and it doesnt run otherwise
-	ai_movement = /datum/ai_movement/jps
-	///ID card generated from the suit's required access. Used for pathing.
-	var/obj/item/card/id/advanced/id_card
-
-/datum/ai_controller/mod/TryPossessPawn(atom/new_pawn)
-	if(!istype(new_pawn, /obj/item/mod/control))
-		return AI_CONTROLLER_INCOMPATIBLE
-	var/obj/item/mod/control/mod = new_pawn
-	id_card = new /obj/item/card/id/advanced/simple_bot()
-	if(length(mod.req_access))
-		id_card.set_access(mod.req_access)
-	return ..() //Run parent at end
-
-/datum/ai_controller/mod/UnpossessPawn(destroy)
-	QDEL_NULL(id_card)
-	return ..() //Run parent at end
-
-/datum/ai_controller/mod/SelectBehaviors(delta_time)
-	current_behaviors = list()
-	if(blackboard[BB_MOD_TARGET] && blackboard[BB_MOD_IMPLANT])
-		queue_behavior(/datum/ai_behavior/mod_attach)
-
-/datum/ai_controller/mod/get_access()
-	return id_card
-
-/datum/ai_behavior/mod_attach
-	behavior_flags = AI_BEHAVIOR_REQUIRE_MOVEMENT|AI_BEHAVIOR_MOVE_AND_PERFORM
-
-/datum/ai_behavior/mod_attach/perform(delta_time, datum/ai_controller/controller)
-	. = ..()
-	if(!controller.pawn.Adjacent(controller.blackboard[BB_MOD_TARGET]))
-		return
-	var/obj/item/implant/mod/implant = controller.blackboard[BB_MOD_IMPLANT]
-	implant.module.attach(controller.blackboard[BB_MOD_TARGET])
-	finish_action(controller, TRUE)
-
-/datum/ai_behavior/mod_attach/finish_action(datum/ai_controller/controller, succeeded)
-	. = ..()
-	controller.blackboard[BB_MOD_TARGET] = null
-	var/obj/item/implant/mod/implant = controller.blackboard[BB_MOD_IMPLANT]
-	implant.end_recall(succeeded)

code/modules/client/preferences/mod_select.dm

@@ -0,0 +1,23 @@
+/// Switches between mouse buttons for MODsuit active modules
+/datum/preference/choiced/mod_select
+	category = PREFERENCE_CATEGORY_GAME_PREFERENCES
+	savefile_key = "mod_select"
+	savefile_identifier = PREFERENCE_PLAYER
+
+/datum/preference/choiced/mod_select/init_possible_values()
+	return list(MIDDLE_CLICK, ALT_CLICK)
+
+/datum/preference/choiced/mod_select/create_default_value()
+	return MIDDLE_CLICK
+
+/datum/preference/choiced/mod_select/apply_to_client_updated(client/client, value)
+	if(!ishuman(client.mob))
+		return
+	var/mob/living/carbon/human/client_owner = client.mob
+	if(!istype(client_owner.back, /obj/item/mod/control))
+		return
+	var/obj/item/mod/control/mod = client_owner.back
+	if(!mod.selected_module)
+		return
+	UnregisterSignal(mod.wearer, mod.selected_module.used_signal)
+	mod.selected_module.update_signal(value)

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

@@ -27,8 +27,8 @@
 		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)
@@ -624,12 +624,21 @@
 			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/human/inventory.dm

@@ -304,7 +304,8 @@
 		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(!storage)
 		if(!thing)
 			equipped_back.attack_hand(src)
 		else
@@ -314,10 +315,11 @@
 		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/carbon/human/species.dm

@@ -1303,7 +1303,7 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 		if(ITEM_SLOT_FEET)
 			if(H.shoes)
 				return FALSE
-			if( !(I.slot_flags & ITEM_SLOT_FEET) )
+			if((DIGITIGRADE in species_traits) && !(I.item_flags & IGNORE_DIGITIGRADE))
 				return FALSE
 			if(num_legs < 2)
 				return FALSE

code/modules/mob/living/living.dm

@@ -47,6 +47,8 @@
 	return ..()
 
 /mob/living/proc/ZImpactDamage(turf/T, levels)
+	if(SEND_SIGNAL(src, COMSIG_LIVING_Z_IMPACT, levels, T) & NO_Z_IMPACT_DAMAGE)
+		return
 	visible_message("<span class='danger'>[src] crashes into [T] with a sickening noise!</span>", \
 					"<span class='userdanger'>You crash into [T] with a sickening noise!</span>")
 	adjustBruteLoss((levels * 5) ** 1.5)
@@ -753,7 +755,8 @@
 		return pick("trails_1", "trails_2")
 
 /mob/living/experience_pressure_difference(pressure_difference, direction, pressure_resistance_prob_delta = 0)
-	if(buckled)
+	playsound(src, 'sound/effects/space_wind.ogg', 50, TRUE)
+	if(buckled || mob_negates_gravity())
 		return
 	if(client && client.move_delay >= world.time + world.tick_lag*2)
 		pressure_resistance_prob_delta -= 30

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
@@ -173,10 +173,20 @@
 	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)
+	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 +420,7 @@
 
 	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/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 +1,71 @@
+/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
+
+/datum/action/item_action/mod/New(Target)
+	..()
+	mod = Target
+
+/datum/action/item_action/mod/Grant(mob/M)
+	if(owner)
+		Share(M)
+		return
+	..()
+
+/datum/action/item_action/mod/Remove(mob/M)
+	var/mob_to_grant
+	for(var/datum/weakref/reference as anything in sharers)
+		var/mob/freeloader = reference.resolve()
+		if(!freeloader)
+			continue
+		mob_to_grant = freeloader
+		break
+	..()
+	if(mob_to_grant)
+		Grant(mob_to_grant)
+
+/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/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/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/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

code/modules/mod/mod_activation.dm

@@ -0,0 +1,217 @@
+#define MOD_ACTIVATION_STEP_TIME 2 SECONDS
+#define MOD_ACTIVATION_STEP_FLAGS IGNORE_USER_LOC_CHANGE|IGNORE_TARGET_LOC_CHANGE|IGNORE_HELD_ITEM|IGNORE_INCAPACITATED
+
+/// 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 || 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)
+	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(locked && !active && !allowed(user) && !force_deactivate)
+		balloon_alert(user, "access insufficient!")
+		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)
+			continue
+		module.on_deactivation()
+	activating = TRUE
+	to_chat(wearer, span_notice("MODsuit [active ? "shutting down" : "starting up"]."))
+	if(do_after(wearer, MOD_ACTIVATION_STEP_TIME, wearer, MOD_ACTIVATION_STEP_FLAGS))
+		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)
+	if(do_after(wearer, MOD_ACTIVATION_STEP_TIME, wearer, MOD_ACTIVATION_STEP_FLAGS))
+		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)
+	if(do_after(wearer, MOD_ACTIVATION_STEP_TIME, wearer, MOD_ACTIVATION_STEP_FLAGS))
+		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)
+	if(do_after(wearer, MOD_ACTIVATION_STEP_TIME, wearer, MOD_ACTIVATION_STEP_FLAGS))
+		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)
+	if(do_after(wearer, MOD_ACTIVATION_STEP_TIME, wearer, MOD_ACTIVATION_STEP_FLAGS))
+		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)
+	activating = FALSE
+	return TRUE
+
+///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
+	if(part == boots)
+		boots.icon_state = "[skin]-boots[seal ? "-sealed" : ""]"
+		wearer.update_inv_shoes()
+	if(part == gauntlets)
+		gauntlets.icon_state = "[skin]-gauntlets[seal ? "-sealed" : ""]"
+		wearer.update_inv_gloves()
+	if(part == chestplate)
+		chestplate.icon_state = "[skin]-chestplate[seal ? "-sealed" : ""]"
+		wearer.update_inv_wear_suit()
+		wearer.update_inv_w_uniform()
+	if(part == helmet)
+		helmet.icon_state = "[skin]-helmet[seal ? "-sealed" : ""]"
+		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)
+
+#undef MOD_ACTIVATION_STEP_TIME
+#undef MOD_ACTIVATION_STEP_FLAGS

code/modules/mod/mod_ai.dm

@@ -0,0 +1,88 @@
+/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
+			balloon_alert(user, "transferring to card...")
+			if(!do_after(user, 5 SECONDS, target = src))
+				balloon_alert(user, "interrupted!")
+				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)
+				if(action.owner == intAI)
+					action.Remove(intAI)
+				else
+					action.Unshare(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(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
+			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(new_ai)
+
+#define MOVE_DELAY 2
+#define WEARER_DELAY 1
+#define LONE_DELAY 5
+#define CELL_PER_STEP DEFAULT_CELL_DRAIN * 2.5
+
+/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)
+	COOLDOWN_START(src, cooldown_mod_move, movedelay * timemodifier + slowdown)
+	playsound(src, 'sound/mecha/mechmove01.ogg', 25, TRUE)
+	cell.charge = max(0, cell.charge - CELL_PER_STEP)
+	if(ismovable(wearer?.loc))
+		return wearer.loc.relaymove(wearer, direction)
+	if(wearer && !wearer.Process_Spacemove(direction))
+		return FALSE
+	var/atom/movable/mover = wearer || src
+	return step(mover, direction)
+
+#undef MOVE_DELAY
+#undef WEARER_DELAY
+#undef LONE_DELAY
+#undef CELL_PER_STEP

code/modules/mod/mod_clothes.dm

@@ -0,0 +1,123 @@
+/obj/item/clothing/head/helmet/space/mod
+	name = "MOD helmet"
+	desc = "A helmet for a MODsuit."
+	icon = 'icons/obj/mod.dmi'
+	icon_state = "helmet"
+	worn_icon = 'icons/mob/mod.dmi'
+	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 = FLASH_PROTECTION_NONE
+	clothing_flags = SNUG_FIT
+	flags_inv = HIDEFACIALHAIR
+	flags_cover = NONE
+	visor_flags = THICKMATERIAL|STOPSPRESSUREDAMAGE
+	visor_flags_inv = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT
+	visor_flags_cover = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF
+	var/alternate_layer = NECK_LAYER
+	var/obj/item/mod/control/mod
+
+/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/armor/mod
+	name = "MOD chestplate"
+	desc = "A chestplate for a MODsuit."
+	icon = 'icons/obj/mod.dmi'
+	icon_state = "chestplate"
+	worn_icon = 'icons/mob/mod.dmi'
+	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
+	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
+
+/obj/item/clothing/suit/armor/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/mod.dmi'
+	icon_state = "gauntlets"
+	worn_icon = 'icons/mob/mod.dmi'
+	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
+
+/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, silent = TRUE)
+	overslot = null
+
+/obj/item/clothing/shoes/mod
+	name = "MOD boots"
+	desc = "A pair of boots for a MODsuit."
+	icon = 'icons/obj/mod.dmi'
+	icon_state = "boots"
+	worn_icon = 'icons/mob/mod.dmi'
+	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 = IGNORE_DIGITIGRADE
+	var/obj/item/mod/control/mod
+	var/obj/item/clothing/overslot
+
+/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, silent = TRUE)
+	overslot = null

code/modules/mod/mod_construction.dm

@@ -0,0 +1,278 @@
+/obj/item/mod/construction
+	desc = "A part used in MOD construction."
+	inhand_icon_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"
+	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-broken"
+	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-armor"
+	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]-armor"
+
+/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/mining
+	theme = /datum/mod_theme/mining
+
+/obj/item/mod/construction/armor/medical
+	theme = /datum/mod_theme/medical
+
+/obj/item/mod/construction/armor/security
+	theme = /datum/mod_theme/security
+
+/obj/item/mod/construction/armor/cosmohonk
+	theme = /datum/mod_theme/cosmohonk
+
+/obj/item/mod/paint
+	name = "MOD paint kit"
+	desc = "This kit will repaint your MODsuit to something unique."
+	icon = 'icons/obj/mod.dmi'
+	icon_state = "paintkit"
+
+#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 +1,559 @@
+/// 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/mod.dmi'
+	icon_state = "standard-control"
+	worn_icon = 'icons/mob/mod.dmi'
+
+/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"
+	inhand_icon_state = "mod_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)
+	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)
+	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 ID locked.
+	var/locked = 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_CELL_DRAIN
+	/// Slowdown of the MOD when not active.
+	var/slowdown_inactive = 2
+	/// Slowdown of the MOD when active.
+	var/slowdown_active = 1
+	/// 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/armor/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 mob inhabiting the MOD.
+	var/mob/living/silicon/ai/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(length(req_access))
+		locked = TRUE
+	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/armor/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)]"
+	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(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
+
+/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/screwdriver_act(mob/living/user, obj/item/screwdriver)
+	if(..())
+		return TRUE
+	if(active || activating || ai_controller)
+		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/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(istype(attacking_item, /obj/item/mod/paint))
+		if(active || activating)
+			balloon_alert(user, "suit is active!")
+		else if(paint(user, attacking_item))
+			balloon_alert(user, "suit painted")
+		else
+			balloon_alert(user, "not painted!")
+		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/GetAccess()
+	if(ai_controller)
+		return req_access.Copy()
+	else
+		return ..()
+
+/obj/item/mod/control/emag_act(mob/user)
+	locked = !locked
+	balloon_alert(user, "[locked ? "locked" : "unlocked"]")
+
+/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(mutable_appearance/standing, 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(standing)
+		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/paint(mob/user, obj/item/paint)
+	if(length(theme.skins) <= 1)
+		return FALSE
+	var/list/skins = list()
+	for(var/mod_skin in theme.skins)
+		skins[mod_skin] = image(icon = icon, icon_state = "[mod_skin]-control")
+	var/pick = show_radial_menu(user, src, skins, custom_check = FALSE, require_near = TRUE)
+	if(!pick || !user.is_holding(paint))
+		return FALSE
+	skin = pick
+	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()
+	return TRUE
+
+/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_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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 0, BIO = 100, FIRE = 25, ACID = 25, WOUND = 10)
+	/// 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_CELL_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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 10, BIO = 100, FIRE = 100, ACID = 25, WOUND = 10)
+	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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 10, BIO = 100, FIRE = 100, ACID = 75, WOUND = 10)
+	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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR,
+				UNSEALED_COVER = HEADCOVERSMOUTH,
+				SEALED_COVER = HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 50, BIO = 100, FIRE = 100, ACID = 90, WOUND = 10)
+	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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 50, BIO = 100, FIRE = 100, ACID = 75, WOUND = 15)
+	resistance_flags = FIRE_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	cell_drain = DEFAULT_CELL_DRAIN * 2
+	complexity_max = DEFAULT_MAX_COMPLEXITY + 5
+	skins = list(
+		"mining" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEYES|HIDEFACE,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 10, BIO = 100, FIRE = 60, ACID = 75, WOUND = 10)
+	cell_drain = DEFAULT_CELL_DRAIN * 1.5
+	slowdown_inactive = 1
+	slowdown_active = 0.5
+	skins = list(
+		"medical" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 10, BIO = 100, FIRE = 100, ACID = 100, WOUND = 10)
+	resistance_flags = FIRE_PROOF|ACID_PROOF
+	max_heat_protection_temperature = FIRE_SUIT_MAX_TEMP_PROTECT
+	cell_drain = DEFAULT_CELL_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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 100, BIO = 100, FIRE = 100, ACID = 100, WOUND = 15)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 10, BIO = 100, FIRE = 75, ACID = 75, WOUND = 20)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEYES|HIDEFACE,
+				UNSEALED_COVER = HEADCOVERSMOUTH,
+				SEALED_COVER = HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, 	BOMB = 25, BIO = 100, FIRE = 100, ACID = 95, WOUND = 25)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 50, BIO = 100, FIRE = 100, ACID = 100, WOUND = 20)
+	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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 10, BIO = 100, FIRE = 60, ACID = 30, WOUND = 5)
+	cell_drain = DEFAULT_CELL_DRAIN * 0.25
+	slowdown_inactive = 1.75
+	slowdown_active = 1.25
+	skins = list(
+		"cosmohonk" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEEARS|HIDEHAIR,
+				SEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEYES|HIDEFACE|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 35, BIO = 100, FIRE = 50, ACID = 90, WOUND = 25)
+	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(/obj/item/mod/module/armor_booster)
+	skins = list(
+		"syndicate" = list(
+			HELMET_LAYER = NECK_LAYER,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 55, BIO = 100, FIRE = 100, ACID = 100, WOUND = 25)
+	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(/obj/item/mod/module/armor_booster/elite)
+	skins = list(
+		"elite" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 40, ENERGY = 50, BOMB = 35, BIO = 100, FIRE = 100, ACID = 100, WOUND = 30)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 0, BULLET = 0, LASER = 0, ENERGY = 0, BOMB = 50, BIO = 100, FIRE = 100, ACID = 75, WOUND = 5)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 35, BULLET = 30, LASER = 30, ENERGY = 40, BOMB = 50, BIO = 100, FIRE = 100, ACID = 90, WOUND = 15)
+	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 = SNUG_FIT,
+				SEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE|HIDEHAIR|HIDESNOUT,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEEARS|HIDEHAIR,
+				SEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEMASK|HIDEEYES|HIDEFACE|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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 = 35, BULLET = 40, LASER = 40, ENERGY = 50, BOMB = 50, BIO = 100, FIRE = 100, ACID = 100, WOUND = 15)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEYES|HIDEFACE,
+				SEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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)
+	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 = SNUG_FIT|THICKMATERIAL,
+				SEALED_CLOTHING = STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE,
+				UNSEALED_COVER = HEADCOVERSMOUTH,
+				SEALED_COVER = HEADCOVERSEYES|PEPPERPROOF,
+			),
+			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)
+	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_CELL_DRAIN * 0
+	slowdown_inactive = 0
+	slowdown_active = 0
+	skins = list(
+		"debug" = list(
+			HELMET_LAYER = null,
+			HELMET_FLAGS = list(
+				UNSEALED_CLOTHING = SNUG_FIT|THICKMATERIAL|STOPSPRESSUREDAMAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEHAIR|HIDESNOUT,
+				SEALED_INVISIBILITY = HIDEMASK|HIDEEARS|HIDEEYES|HIDEFACE,
+				UNSEALED_COVER = HEADCOVERSMOUTH|HEADCOVERSEYES|PEPPERPROOF,
+			),
+			CHESTPLATE_FLAGS = list(
+				UNSEALED_CLOTHING = THICKMATERIAL|STOPSPRESSUREDAMAGE|BLOCKS_SHOVE_KNOCKDOWN,
+				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 +1,157 @@
+/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/large_capacity, /obj/item/mod/module/welding, /obj/item/mod/module/rad_protection, /obj/item/mod/module/jetpack, /obj/item/mod/module/flashlight)
+
+/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/large_capacity, /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/large_capacity, /obj/item/mod/module/flashlight, /obj/item/mod/module/health_analyzer, /obj/item/mod/module/injector)
+
+/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/large_capacity, /obj/item/mod/module/welding, /obj/item/mod/module/flashlight, /obj/item/mod/module/circuit, /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/large_capacity, /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/large_capacity, /obj/item/mod/module/welding, /obj/item/mod/module/holster, /obj/item/mod/module/pathfinder)
+
+/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/syndicate, /obj/item/mod/module/welding, /obj/item/mod/module/tether, /obj/item/mod/module/pathfinder, /obj/item/mod/module/flashlight, /obj/item/mod/module/dna_lock)
+
+/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/syndicate, /obj/item/mod/module/welding, /obj/item/mod/module/jetpack, /obj/item/mod/module/visor/thermal, /obj/item/mod/module/flashlight, /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/syndicate, /obj/item/mod/module/welding, /obj/item/mod/module/emp_shield, /obj/item/mod/module/jetpack, /obj/item/mod/module/visor/thermal, /obj/item/mod/module/flashlight, /obj/item/mod/module/holster)
+
+/obj/item/mod/control/pre_equipped/enchanted
+	theme = /datum/mod_theme/enchanted
+	cell = /obj/item/stock_parts/cell/crystal_cell/wizard
+	initial_modules = list(/obj/item/mod/module/storage/large_capacity, /obj/item/mod/module/energy_shield/wizard, /obj/item/mod/module/emp_shield)
+
+/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/large_capacity, /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/large_capacity, /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/bluespace, /obj/item/mod/module/welding, /obj/item/mod/module/emp_shield, /obj/item/mod/module/jetpack, /obj/item/mod/module/holster)
+
+/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/bluespace, /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/bluespace, /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, /obj/item/mod/module/injector) //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/bluespace, /obj/item/mod/module/welding, /obj/item/mod/module/stealth/ninja, /obj/item/mod/module/quick_carry/advanced, /obj/item/mod/module/magboot/advanced, /obj/item/mod/module/jetpack)
+
+//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 +1,80 @@
+/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()
+	var/data = list()
+	data["interface_break"] = interface_break
+	data["malfunctioning"] = malfunctioning
+	data["open"] = open
+	data["active"] = active
+	data["locked"] = locked
+	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["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(!allowed(usr) && locked)
+		balloon_alert(usr, "insufficient access!")
+		playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return
+	if(malfunctioning && prob(75))
+		balloon_alert(usr, "button malfunctions!")
+		return
+	switch(action)
+		if("lock")
+			locked = !locked
+			balloon_alert(usr, "[locked ? "locked" : "unlocked"]!")
+		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"])
+	return TRUE

code/modules/mod/modules/_module.dm

@@ -0,0 +1,252 @@
+/obj/item/mod/module
+	name = "MOD module"
+	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_CELL_DRAIN * 0
+	/// Power use when active
+	var/active_power_cost = DEFAULT_CELL_DRAIN * 0
+	/// Power use when used, we call it manually
+	var/use_power_cost = DEFAULT_CELL_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
+	/// 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
+	/// 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(HAS_TRAIT(user, TRAIT_DIAGNOSTIC_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 || module_type == MODULE_PASSIVE)
+		return
+	if(module_type != MODULE_USABLE)
+		if(active)
+			on_deactivation()
+		else
+			on_activation()
+	else
+		on_use()
+	SEND_SIGNAL(mod, COMSIG_MOD_MODULE_SELECTED)
+
+/// 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(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
+			var/used_button = mod.wearer.client?.prefs.read_preference(/datum/preference/choiced/mod_select) || MIDDLE_CLICK
+			update_signal(used_button)
+			balloon_alert(mod.wearer, "[src] activated, [used_button]-click to use")
+	active = TRUE
+	COOLDOWN_START(src, cooldown_timer, cooldown_time)
+	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
+	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)
+	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(mutable_appearance/standing)
+	. = list()
+	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('icons/mob/mod.dmi', used_overlay, layer = standing.layer + 0.1)
+	. += module_icon
+
+/// Updates the signal used by active modules to be activated
+/obj/item/mod/module/proc/update_signal(value)
+	switch(value)
+		if(MIDDLE_CLICK)
+			mod.selected_module.used_signal = COMSIG_MOB_MIDDLECLICKON
+		if(ALT_CLICK)
+			mod.selected_module.used_signal = COMSIG_MOB_ALTCLICKON
+	RegisterSignal(mod.wearer, mod.selected_module.used_signal, /obj/item/mod/module.proc/on_special_click)

code/modules/mod/modules/modules.dm

@@ -0,0 +1,352 @@
+/obj/item/mod/module
+	name = "MOD module"
+	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_CELL_DRAIN * 0
+	/// Power use when active
+	var/active_power_cost = DEFAULT_CELL_DRAIN * 0
+	/// Power use when used, we call it manually
+	var/use_power_cost = DEFAULT_CELL_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
+	/// 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
+	/// 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(HAS_TRAIT(user, TRAIT_DIAGNOSTIC_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 || module_type == MODULE_PASSIVE)
+		return
+	if(module_type != MODULE_USABLE)
+		if(active)
+			on_deactivation()
+		else
+			on_activation()
+	else
+		on_use()
+	SEND_SIGNAL(mod, COMSIG_MOD_MODULE_SELECTED)
+
+/// 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(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
+			var/used_button = mod.wearer.client?.prefs.read_preference(/datum/preference/choiced/mod_select) || MIDDLE_CLICK
+			update_signal(used_button)
+			balloon_alert(mod.wearer, "[src] activated, [used_button]-click to use")
+	active = TRUE
+	COOLDOWN_START(src, cooldown_timer, cooldown_time)
+	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
+	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)
+	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(mutable_appearance/standing)
+	. = list()
+	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('icons/mob/mod.dmi', used_overlay, layer = standing.layer + 0.1)
+	. += module_icon
+
+/// Updates the signal used by active modules to be activated
+/obj/item/mod/module/proc/update_signal(value)
+	switch(value)
+		if(MIDDLE_CLICK)
+			mod.selected_module.used_signal = COMSIG_MOB_MIDDLECLICKON
+		if(ALT_CLICK)
+			mod.selected_module.used_signal = COMSIG_MOB_ALTCLICKON
+	RegisterSignal(mod.wearer, mod.selected_module.used_signal, /obj/item/mod/module.proc/on_special_click)
+	icon_state = "magic_nullifier"
+	removable = FALSE
+	incompatible_modules = list(/obj/item/mod/module/anti_magic)
+
+/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_CELL_DRAIN*0.75
+//	use_power_cost = DEFAULT_CELL_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(mutable_appearance/standing)
+	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"

tgstation.dme

@@ -506,7 +506,6 @@
 #include "code\datums\achievements\misc_scores.dm"
 #include "code\datums\achievements\skill_achievements.dm"
 #include "code\datums\actions\beam_rifle.dm"
-#include "code\datums\ai\objects\mod.dm"
 #include "code\datums\announcers\_announcer.dm"
 #include "code\datums\announcers\default_announcer.dm"
 #include "code\datums\announcers\intern_announcer.dm"
@@ -2023,6 +2022,7 @@
 #include "code\modules\client\preferences_savefile.dm"
 #include "code\modules\client\preferences_toggles.dm"
 #include "code\modules\client\preferences_vr.dm"
+#include "code\modules\client\preferences\mod_select.dm"
 #include "code\modules\client\verbs\aooc.dm"
 #include "code\modules\client\verbs\autobunker.dm"
 #include "code\modules\client\verbs\etips.dm"
@@ -2958,6 +2958,18 @@
 #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_construction.dm"
+#include "code\modules\mod\mod_control.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\modular_computers\laptop_vendor.dm"
 #include "code\modules\modular_computers\computers\_modular_computer_shared.dm"
 #include "code\modules\modular_computers\computers\item\computer.dm"