diff --git a/code/__DEFINES/DNA.dm b/code/__DEFINES/DNA.dm
index de3b90eb1c..44fcce6253 100644
--- a/code/__DEFINES/DNA.dm
+++ b/code/__DEFINES/DNA.dm
@@ -44,20 +44,6 @@
 //Mutations that cant be taken from genetics and are not in SE
 #define	NON_SCANNABLE		-1
 
-	// Extra powers:
-#define LASER			9 	// harm intent - click anywhere to shoot lasers from eyes
-#define HEAL			10 	// healing people with hands
-#define SHADOW			11 	// shadow teleportation (create in/out portals anywhere) (25%)
-#define SCREAM			12 	// supersonic screaming (25%)
-#define EXPLOSIVE		13 	// exploding on-demand (15%)
-#define REGENERATION	14 	// superhuman regeneration (30%)
-#define REPROCESSOR		15 	// eat anything (50%)
-#define SHAPESHIFTING	16 	// take on the appearance of anything (40%)
-#define PHASING			17 	// ability to phase through walls (40%)
-#define SHIELD			18 	// shielding from all projectile attacks (30%)
-#define SHOCKWAVE		19 	// attack a nearby tile and cause a massive shockwave, knocking most people on their asses (25%)
-#define ELECTRICITY		20 	// ability to shoot electric attacks (15%)
-
 //DNA - Because fuck you and your magic numbers being all over the codebase.
 #define DNA_BLOCK_SIZE				3
 
@@ -81,7 +67,6 @@
 #define TR_KEEPIMPLANTS	16
 #define TR_KEEPSE		32 // changelings shouldn't edit the DNA's SE when turning into a monkey
 #define TR_DEFAULTMSG	64
-#define TR_KEEPSRC		128
 #define TR_KEEPORGANS	256
 
 
diff --git a/code/__DEFINES/admin.dm b/code/__DEFINES/admin.dm
index 62d4b94528..e8b744ce5b 100644
--- a/code/__DEFINES/admin.dm
+++ b/code/__DEFINES/admin.dm
@@ -37,12 +37,6 @@
 
 #define R_DEFAULT R_AUTOLOGIN
 
-#if DM_VERSION > 512
-#error Remove the flag below , its been long enough
-#endif
-//legacy , remove post 512, it was replaced by R_POLL
-#define R_REJUVINATE	2
-
 #define R_MAXPERMISSION 4096 //This holds the maximum value for a permission. It is used in iteration, so keep it updated.
 
 #define ADMIN_QUE(user) "(<a href='?_src_=holder;[HrefToken(TRUE)];adminmoreinfo=[REF(user)]'>?</a>)"
diff --git a/code/__DEFINES/atmospherics.dm b/code/__DEFINES/atmospherics.dm
index 73f2661ed5..bc95a9ddff 100644
--- a/code/__DEFINES/atmospherics.dm
+++ b/code/__DEFINES/atmospherics.dm
@@ -28,7 +28,6 @@
 #define CELL_VOLUME				2500	//liters in a cell
 #define BREATH_VOLUME			0.5		//liters in a normal breath
 #define BREATH_PERCENTAGE		(BREATH_VOLUME/CELL_VOLUME)					//Amount of air to take a from a tile
-#define HUMAN_NEEDED_OXYGEN		(MOLES_CELLSTANDARD*BREATH_PERCENTAGE*0.16)	//Amount of air needed before pass out/suffocation commences
 
 //EXCITED GROUPS
 #define EXCITED_GROUP_BREAKDOWN_CYCLES				4		//number of FULL air controller ticks before an excited group breaks down (averages gas contents across turfs)
@@ -46,10 +45,7 @@
 //HEAT TRANSFER COEFFICIENTS
 //Must be between 0 and 1. Values closer to 1 equalize temperature faster
 //Should not exceed 0.4 else strange heat flow occur
-#define FLOOR_HEAT_TRANSFER_COEFFICIENT		0.4
 #define WALL_HEAT_TRANSFER_COEFFICIENT		0.0
-#define DOOR_HEAT_TRANSFER_COEFFICIENT		0.0
-#define SPACE_HEAT_TRANSFER_COEFFICIENT		0.2		//a hack to partly simulate radiative heat
 #define OPEN_HEAT_TRANSFER_COEFFICIENT		0.4
 #define WINDOW_HEAT_TRANSFER_COEFFICIENT	0.1		//a hack for now
 #define HEAT_CAPACITY_VACUUM				7000	//a hack to help make vacuums "cold", sacrificing realism for gameplay
@@ -59,8 +55,6 @@
 #define FIRE_MINIMUM_TEMPERATURE_TO_EXIST	100+T0C
 #define FIRE_SPREAD_RADIOSITY_SCALE			0.85
 #define FIRE_GROWTH_RATE					40000	//For small fires
-#define CARBON_LIFEFORM_FIRE_RESISTANCE 	200+T0C	//Resistance to fire damage
-#define CARBON_LIFEFORM_FIRE_DAMAGE			4		//Fire damage
 #define PLASMA_MINIMUM_BURN_TEMPERATURE		100+T0C
 
 //GASES
@@ -74,11 +68,6 @@
 #define REACTING		1
 #define STOP_REACTIONS 	2
 
-//HUMANS
-//Hurty numbers
-#define FIRE_DAMAGE_MODIFIER	0.0215	//Higher values result in more external fire damage to the skin
-#define AIR_DAMAGE_MODIFIER		1.025	//More means less damage from hot air scalding lungs, less = more damage //CITADEL EDIT 1.025
-
 // Pressure limits.
 #define HAZARD_HIGH_PRESSURE				550		//This determins at what pressure the ultra-high pressure red icon is displayed. (This one is set as a constant)
 #define WARNING_HIGH_PRESSURE				325		//This determins when the orange pressure icon is displayed (it is 0.7 * HAZARD_HIGH_PRESSURE)
@@ -123,7 +112,7 @@
 #define SHOES_MAX_TEMP_PROTECT				1500	//For gloves
 
 #define PRESSURE_DAMAGE_COEFFICIENT			4		//The amount of pressure damage someone takes is equal to (pressure / HAZARD_HIGH_PRESSURE)*PRESSURE_DAMAGE_COEFFICIENT, with the maximum of MAX_PRESSURE_DAMAGE
-#define MAX_HIGH_PRESSURE_DAMAGE			16		// CITADEL CHANGES Max to 16, low to 8. 
+#define MAX_HIGH_PRESSURE_DAMAGE			16		// CITADEL CHANGES Max to 16, low to 8.
 #define LOW_PRESSURE_DAMAGE					8		//The amount of damage someone takes when in a low pressure area (The pressure threshold is so low that it doesn't make sense to do any calculations, so it just applies this flat value).
 
 #define COLD_SLOWDOWN_FACTOR				20		//Humans are slowed by the difference between bodytemp and BODYTEMP_COLD_DAMAGE_LIMIT divided by this
@@ -196,4 +185,3 @@ GLOBAL_LIST_INIT(pipe_paint_colors, list(
 		"Violet" = rgb(64,0,128),
 		"Yellow" = rgb(255,198,0)
 		))
-
diff --git a/code/__DEFINES/cleaning.dm b/code/__DEFINES/cleaning.dm
index eed0ee5f54..c4db590e90 100644
--- a/code/__DEFINES/cleaning.dm
+++ b/code/__DEFINES/cleaning.dm
@@ -1,5 +1,5 @@
 //Cleaning tool strength
-#define CLEAN_VERY_WEAK 	1 // What are you scrubbing the ground with a toothpick?
+// 1 is also a valid cleaning strength but completely unused so left undefined
 #define CLEAN_WEAK 			2
 #define CLEAN_MEDIUM		3 // Acceptable tools
 #define CLEAN_STRONG		4 // Industrial strength
diff --git a/code/__DEFINES/clockcult.dm b/code/__DEFINES/clockcult.dm
index 9f23ba2d38..070b92acc7 100644
--- a/code/__DEFINES/clockcult.dm
+++ b/code/__DEFINES/clockcult.dm
@@ -64,8 +64,6 @@ GLOBAL_LIST_EMPTY(all_scripture) //a list containing scripture instances; not us
 
 #define GATEWAY_RATVAR_ARRIVAL 600 //when progress is at or above this, game over ratvar's here everybody go home
 
-#define ARK_SUMMON_COST 5 //how many of each component an Ark costs to summon
-
 //Objective text define
 #define CLOCKCULT_OBJECTIVE "Construct the Ark of the Clockwork Justicar and free Ratvar."
 
diff --git a/code/__DEFINES/colors.dm b/code/__DEFINES/colors.dm
index 10d4182b28..824f5b3e61 100644
--- a/code/__DEFINES/colors.dm
+++ b/code/__DEFINES/colors.dm
@@ -3,26 +3,26 @@
 #define COLOR_INPUT_DISABLED "#F0F0F0"
 #define COLOR_INPUT_ENABLED "#D3B5B5"
 
-#define COLOR_WHITE            "#EEEEEE"
-#define COLOR_SILVER           "#C0C0C0"
-#define COLOR_GRAY             "#808080"
+//#define COLOR_WHITE            "#EEEEEE"
+//#define COLOR_SILVER           "#C0C0C0"
+//#define COLOR_GRAY             "#808080"
 #define COLOR_FLOORTILE_GRAY   "#8D8B8B"
 #define COLOR_ALMOST_BLACK	   "#333333"
-#define COLOR_BLACK            "#000000"
+//#define COLOR_BLACK            "#000000"
 #define COLOR_RED              "#FF0000"
-#define COLOR_RED_LIGHT        "#FF3333"
-#define COLOR_MAROON           "#800000"
+//#define COLOR_RED_LIGHT        "#FF3333"
+//#define COLOR_MAROON           "#800000"
 #define COLOR_YELLOW           "#FFFF00"
-#define COLOR_OLIVE            "#808000"
-#define COLOR_LIME             "#32CD32"
+//#define COLOR_OLIVE            "#808000"
+//#define COLOR_LIME             "#32CD32"
 #define COLOR_GREEN            "#008000"
 #define COLOR_CYAN             "#00FFFF"
-#define COLOR_TEAL             "#008080"
+//#define COLOR_TEAL             "#008080"
 #define COLOR_BLUE             "#0000FF"
-#define COLOR_BLUE_LIGHT       "#33CCFF"
-#define COLOR_NAVY             "#000080"
+//#define COLOR_BLUE_LIGHT       "#33CCFF"
+//#define COLOR_NAVY             "#000080"
 #define COLOR_PINK             "#FFC0CB"
-#define COLOR_MAGENTA          "#FF00FF"
+//#define COLOR_MAGENTA          "#FF00FF"
 #define COLOR_PURPLE           "#800080"
 #define COLOR_ORANGE           "#FF9900"
 #define COLOR_BEIGE            "#CEB689"
diff --git a/code/__DEFINES/combat.dm b/code/__DEFINES/combat.dm
index 8e791cfffd..b67c084e10 100644
--- a/code/__DEFINES/combat.dm
+++ b/code/__DEFINES/combat.dm
@@ -110,11 +110,7 @@
 #define EMBEDDED_UNSAFE_REMOVAL_PAIN_MULTIPLIER 8	//Coefficient of multiplication for the damage the item does when removed without a surgery (this*item.w_class)
 #define EMBEDDED_UNSAFE_REMOVAL_TIME			30	//A Time in ticks, total removal time = (this*item.w_class)
 
-//Gun Stuff
-#define SAWN_INTACT  0
-#define SAWN_OFF     1
 //Gun weapon weight
-#define WEAPON_DUAL_WIELD 0
 #define WEAPON_LIGHT 1
 #define WEAPON_MEDIUM 2
 #define WEAPON_HEAVY 3
diff --git a/code/__DEFINES/components.dm b/code/__DEFINES/components.dm
index 40701947b9..5b4ff7e378 100644
--- a/code/__DEFINES/components.dm
+++ b/code/__DEFINES/components.dm
@@ -31,7 +31,6 @@
 	//Positions for overrides list
 	#define EXAMINE_POSITION_ARTICLE 1
 	#define EXAMINE_POSITION_BEFORE 2
-	#define EXAMINE_POSITION_NAME 3
 	//End positions
 	#define COMPONENT_EXNAME_CHANGED 1
 #define COMSIG_ATOM_ENTERED "atom_entered"                      //from base of atom/Entered(): (/atom/movable, /atom)
diff --git a/code/__DEFINES/construction.dm b/code/__DEFINES/construction.dm
index 8d77c39740..e03db1964d 100644
--- a/code/__DEFINES/construction.dm
+++ b/code/__DEFINES/construction.dm
@@ -37,12 +37,6 @@
 #define FAILED_UNFASTEN 1
 #define SUCCESSFUL_UNFASTEN 2
 
-//disposal unit mode defines, which do double time as the construction defines
-#define PRESSURE_OFF 0
-#define PRESSURE_ON 1
-#define PRESSURE_MAXED 2
-#define SCREWS_OUT -1
-
 //ai core defines
 #define EMPTY_CORE 0
 #define CIRCUIT_CORE 1
@@ -51,11 +45,6 @@
 #define GLASS_CORE 4
 #define AI_READY_CORE 5
 
-//field generator construction defines
-#define FG_UNSECURED 0
-#define FG_SECURED 1
-#define FG_WELDED 2
-
 //emitter construction defines
 #define EM_UNSECURED 0
 #define EM_SECURED 1
diff --git a/code/__DEFINES/flags.dm b/code/__DEFINES/flags.dm
index d2c88a0c1b..814120c229 100644
--- a/code/__DEFINES/flags.dm
+++ b/code/__DEFINES/flags.dm
@@ -26,7 +26,6 @@ GLOBAL_LIST_INIT(bitflags, list(1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 204
 #define ON_BORDER_1			512		// item has priority to check when entering or leaving
 
 #define NOSLIP_1			1024 		//prevents from slipping on wet floors, in space etc
-#define _UNUSED_1		2048
 
 // BLOCK_GAS_SMOKE_EFFECT_1 only used in masks at the moment.
 #define BLOCK_GAS_SMOKE_EFFECT_1 4096	// blocks the effect that chemical clouds would have on a mob --glasses, mask and helmets ONLY!
@@ -84,7 +83,6 @@ GLOBAL_LIST_INIT(bitflags, list(1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 204
 
 
 //Movement Types
-#define IMMOBILE 0
 #define GROUND 1
 #define FLYING 2
 
diff --git a/code/__DEFINES/inventory.dm b/code/__DEFINES/inventory.dm
index d2de6f9100..dc3647e1f1 100644
--- a/code/__DEFINES/inventory.dm
+++ b/code/__DEFINES/inventory.dm
@@ -118,22 +118,6 @@
 #define NECK		2048
 #define FULL_BODY	4095
 
-// bitflags for the percentual amount of protection a piece of clothing which covers the body part offers.
-// Used with human/proc/get_heat_protection() and human/proc/get_cold_protection()
-// The values here should add up to 1.
-// Hands and feet have 2.5%, arms and legs 7.5%, each of the torso parts has 15% and the head has 30%
-#define THERMAL_PROTECTION_HEAD			0.3
-#define THERMAL_PROTECTION_CHEST		0.15
-#define THERMAL_PROTECTION_GROIN		0.15
-#define THERMAL_PROTECTION_LEG_LEFT		0.075
-#define THERMAL_PROTECTION_LEG_RIGHT	0.075
-#define THERMAL_PROTECTION_FOOT_LEFT	0.025
-#define THERMAL_PROTECTION_FOOT_RIGHT	0.025
-#define THERMAL_PROTECTION_ARM_LEFT		0.075
-#define THERMAL_PROTECTION_ARM_RIGHT	0.075
-#define THERMAL_PROTECTION_HAND_LEFT	0.025
-#define THERMAL_PROTECTION_HAND_RIGHT	0.025
-
 //flags for female outfits: How much the game can safely "take off" the uniform without it looking weird
 #define NO_FEMALE_UNIFORM			0
 #define FEMALE_UNIFORM_FULL			1
diff --git a/code/__DEFINES/is_helpers.dm b/code/__DEFINES/is_helpers.dm
index 9a43607709..b1a065822d 100644
--- a/code/__DEFINES/is_helpers.dm
+++ b/code/__DEFINES/is_helpers.dm
@@ -1,7 +1,5 @@
 // simple is_type and similar inline helpers
 
-#define isdatum(D) (istype(D, /datum))
-
 #define islist(L) (istype(L, /list))
 
 #if DM_VERSION >= 512
@@ -64,7 +62,6 @@
 #define isjellyperson(A) (is_species(A, /datum/species/jelly))
 #define isslimeperson(A) (is_species(A, /datum/species/jelly/slime))
 #define isluminescent(A) (is_species(A, /datum/species/jelly/luminescent))
-#define isshadowperson(A) (is_species(A, /datum/species/shadow))
 #define iszombie(A) (is_species(A, /datum/species/zombie))
 #define ishumanbasic(A) (is_species(A, /datum/species/human))
 
@@ -106,8 +103,6 @@
 
 #define isbot(A) (istype(A, /mob/living/simple_animal/bot))
 
-#define iscrab(A) (istype(A, /mob/living/simple_animal/crab))
-
 #define isshade(A) (istype(A, /mob/living/simple_animal/shade))
 
 #define ismouse(A) (istype(A, /mob/living/simple_animal/mouse))
@@ -118,16 +113,10 @@
 
 #define iscat(A) (istype(A, /mob/living/simple_animal/pet/cat))
 
-#define isdog(A) (istype(A, /mob/living/simple_animal/pet/dog))
-
 #define iscorgi(A) (istype(A, /mob/living/simple_animal/pet/dog/corgi))
 
 #define ishostile(A) (istype(A, /mob/living/simple_animal/hostile))
 
-#define isbear(A) (istype(A, /mob/living/simple_animal/hostile/bear))
-
-#define iscarp(A) (istype(A, /mob/living/simple_animal/hostile/carp))
-
 #define isswarmer(A) (istype(A, /mob/living/simple_animal/hostile/swarmer))
 
 #define isguardian(A) (istype(A, /mob/living/simple_animal/hostile/guardian))
@@ -183,14 +172,10 @@ GLOBAL_LIST_INIT(pointed_types, typecacheof(list(
 
 #define isigniter(O) (istype(O, /obj/item/device/assembly/igniter))
 
-#define isinfared(O) (istype(O, /obj/item/device/assembly/infra))
-
 #define isprox(O) (istype(O, /obj/item/device/assembly/prox_sensor))
 
 #define issignaler(O) (istype(O, /obj/item/device/assembly/signaler))
 
-#define istimer(O) (istype(O, /obj/item/device/assembly/timer))
-
 GLOBAL_LIST_INIT(glass_sheet_types, typecacheof(list(
 	/obj/item/stack/sheet/glass,
 	/obj/item/stack/sheet/rglass,
@@ -201,4 +186,4 @@ GLOBAL_LIST_INIT(glass_sheet_types, typecacheof(list(
 
 #define is_glass_sheet(O) (is_type_in_typecache(O, GLOB.glass_sheet_types))
 
-#define isblobmonster(O) (istype(O, /mob/living/simple_animal/hostile/blob))
\ No newline at end of file
+#define isblobmonster(O) (istype(O, /mob/living/simple_animal/hostile/blob))
diff --git a/code/__DEFINES/layers.dm b/code/__DEFINES/layers.dm
index 9bf44a7fbd..614383931c 100644
--- a/code/__DEFINES/layers.dm
+++ b/code/__DEFINES/layers.dm
@@ -9,7 +9,6 @@
 #define GAME_PLANE -1
 #define BLACKNESS_PLANE 0 //To keep from conflicts with SEE_BLACKNESS internals
 #define SPACE_LAYER 1.8
-#define ABOVE_SPACE_LAYER 1.9
 //#define TURF_LAYER 2 //For easy recordkeeping; this is a byond define
 #define MID_TURF_LAYER 2.02
 #define HIGH_TURF_LAYER 2.03
diff --git a/code/__DEFINES/lighting.dm b/code/__DEFINES/lighting.dm
index 96197f578e..f68657c3e9 100644
--- a/code/__DEFINES/lighting.dm
+++ b/code/__DEFINES/lighting.dm
@@ -23,27 +23,6 @@
 		0, 0, 0, 1           \
 	)                        \
 
-// Helpers so we can (more easily) control the colour matrices.
-#define CL_MATRIX_RR 1
-#define CL_MATRIX_RG 2
-#define CL_MATRIX_RB 3
-#define CL_MATRIX_RA 4
-#define CL_MATRIX_GR 5
-#define CL_MATRIX_GG 6
-#define CL_MATRIX_GB 7
-#define CL_MATRIX_GA 8
-#define CL_MATRIX_BR 9
-#define CL_MATRIX_BG 10
-#define CL_MATRIX_BB 11
-#define CL_MATRIX_BA 12
-#define CL_MATRIX_AR 13
-#define CL_MATRIX_AG 14
-#define CL_MATRIX_AB 15
-#define CL_MATRIX_AA 16
-#define CL_MATRIX_CR 17
-#define CL_MATRIX_CG 18
-#define CL_MATRIX_CB 19
-#define CL_MATRIX_CA 20
 
 //Some defines to generalise colours used in lighting.
 //Important note on colors. Colors can end up significantly different from the basic html picture, especially when saturated
@@ -90,4 +69,4 @@
 #define LIGHTING_NO_UPDATE 0
 #define LIGHTING_VIS_UPDATE 1
 #define LIGHTING_CHECK_UPDATE 2
-#define LIGHTING_FORCE_UPDATE 3
\ No newline at end of file
+#define LIGHTING_FORCE_UPDATE 3
diff --git a/code/__DEFINES/machines.dm b/code/__DEFINES/machines.dm
index 4665bd3b1e..ad9fcdb2dd 100644
--- a/code/__DEFINES/machines.dm
+++ b/code/__DEFINES/machines.dm
@@ -85,6 +85,3 @@
 #define SUPERMATTER_DANGER 4		// Integrity < 50%
 #define SUPERMATTER_EMERGENCY 5		// Integrity < 25%
 #define SUPERMATTER_DELAMINATING 6	// Pretty obvious.
-
-//R&D Snowflakes
-#define RD_CONSOLE_LOCKED_SCREEN 0.2
diff --git a/code/__DEFINES/medal.dm b/code/__DEFINES/medal.dm
index 5781e14f57..b5ff8eac20 100644
--- a/code/__DEFINES/medal.dm
+++ b/code/__DEFINES/medal.dm
@@ -10,7 +10,6 @@
 #define BOSS_MEDAL_DRAKE	  "Drake"
 #define BOSS_MEDAL_HIEROPHANT "Hierophant"
 #define BOSS_MEDAL_LEGION	  "Legion"
-#define BOSS_MEDAL_SWARMER	  "Swarmer Beacon"
 #define BOSS_MEDAL_TENDRIL	  "Tendril"
 
 // Score names
diff --git a/code/__DEFINES/misc.dm b/code/__DEFINES/misc.dm
index bee1e19a5b..cd0a7ce97c 100644
--- a/code/__DEFINES/misc.dm
+++ b/code/__DEFINES/misc.dm
@@ -20,8 +20,8 @@ Will print: "/mob/living/carbon/human/death" (you can optionally embed it in a s
 #define THIS_PROC_TYPE_STR "[THIS_PROC_TYPE]" //Because you can only obtain a string of THIS_PROC_TYPE using "[]", and it's nice to just +/+= strings
 #define THIS_PROC_TYPE_STR_WITH_ARGS "[THIS_PROC_TYPE]([args.Join(",")])"
 #define THIS_PROC_TYPE_WEIRD ...... //This one is WEIRD, in some cases (When used in certain defines? (eg: ASSERT)) THIS_PROC_TYPE will fail to work, but THIS_PROC_TYPE_WEIRD will work instead
-#define THIS_PROC_TYPE_WEIRD_STR "[THIS_PROC_TYPE_WEIRD]" //Included for completeness
-#define THIS_PROC_TYPE_WEIRD_STR_WITH_ARGS "[THIS_PROC_TYPE_WEIRD]([args.Join(",")])" //Ditto
+//define THIS_PROC_TYPE_WEIRD_STR "[THIS_PROC_TYPE_WEIRD]" //Included for completeness
+//define THIS_PROC_TYPE_WEIRD_STR_WITH_ARGS "[THIS_PROC_TYPE_WEIRD]([args.Join(",")])" //Ditto
 
 #define MIDNIGHT_ROLLOVER		864000	//number of deciseconds in a day
 
@@ -46,7 +46,6 @@ Will print: "/mob/living/carbon/human/death" (you can optionally embed it in a s
 #define HALLOWEEN				"Halloween"
 #define CHRISTMAS				"Christmas"
 #define FESTIVE_SEASON			"Festive Season"
-#define FRIDAY_13TH				"Friday the 13th"
 
 //Human Overlays Indexes/////////
 //LOTS OF CIT CHANGES HERE. BE CAREFUL WHEN UPSTREAM ADDS MORE LAYERS
@@ -86,58 +85,11 @@ Will print: "/mob/living/carbon/human/death" (you can optionally embed it in a s
 //Human Overlay Index Shortcuts for alternate_worn_layer, layers
 //Because I *KNOW* somebody will think layer+1 means "above"
 //IT DOESN'T OK, IT MEANS "UNDER"
-#define UNDER_BODY_BEHIND_LAYER		BODY_BEHIND_LAYER+1
-#define UNDER_BODY_LAYER			BODY_LAYER+1
-#define UNDER_BODY_ADJ_LAYER		BODY_ADJ_LAYER+1
-#define UNDER_MUTATIONS_LAYER		MUTATIONS_LAYER+1
-#define UNDER_BODYPARTS_LAYER		BODYPARTS_LAYER+1
-#define UNDER_DAMAGE_LAYER			DAMAGE_LAYER+1
-#define UNDER_UNIFORM_LAYER			UNIFORM_LAYER+1
-#define UNDER_ID_LAYER				ID_LAYER+1
-#define UNDER_HANDS_PART_LAYER		HANDS_PART_LAYER+1
-#define UNDER_GLOVES_LAYER			GLOVES_LAYER+1
-#define UNDER_SHOES_LAYER			SHOES_LAYER+1
-#define UNDER_EARS_LAYER			EARS_LAYER+1
 #define UNDER_SUIT_LAYER			SUIT_LAYER+1
-#define UNDER_GLASSES_LAYER			GLASSES_LAYER+1
-#define UNDER_BELT_LAYER			BELT_LAYER+1
-#define UNDER_SUIT_STORE_LAYER		SUIT_STORE_LAYER+1
-#define UNDER_BACK_LAYER			BACK_LAYER+1
-#define UNDER_HAIR_LAYER			HAIR_LAYER+1
-#define UNDER_FACEMASK_LAYER		FACEMASK_LAYER+1
-#define UNDER_HEAD_LAYER			HEAD_LAYER+1
-#define UNDER_HANDCUFF_LAYER		HANDCUFF_LAYER+1
-#define UNDER_LEGCUFF_LAYER			LEGCUFF_LAYER+1
-#define UNDER_HANDS_LAYER			HANDS_LAYER+1
-#define UNDER_BODY_FRONT_LAYER		BODY_FRONT_LAYER+1
-#define UNDER_FIRE_LAYER			FIRE_LAYER+1
 
 //AND -1 MEANS "ABOVE", OK?, OK!?!
-#define ABOVE_BODY_BEHIND_LAYER		BODY_BEHIND_LAYER-1
-#define ABOVE_BODY_LAYER			BODY_LAYER-1
-#define ABOVE_BODY_ADJ_LAYER		BODY_ADJ_LAYER-1
-#define ABOVE_MUTATIONS_LAYER		MUTATIONS_LAYER-1
-#define ABOVE_BODYPARTS_LAYER		BODYPARTS_LAYER-1
-#define ABOVE_DAMAGE_LAYER			DAMAGE_LAYER-1
-#define ABOVE_UNIFORM_LAYER			UNIFORM_LAYER-1
-#define ABOVE_ID_LAYER				ID_LAYER-1
-#define ABOVE_HANDS_PART_LAYER		HANDS_PART_LAYER-1
-#define ABOVE_GLOVES_LAYER			GLOVES_LAYER-1
 #define ABOVE_SHOES_LAYER			SHOES_LAYER-1
-#define ABOVE_EARS_LAYER			EARS_LAYER-1
-#define ABOVE_SUIT_LAYER			SUIT_LAYER-1
-#define ABOVE_GLASSES_LAYER			GLASSES_LAYER-1
-#define ABOVE_BELT_LAYER			BELT_LAYER-1
-#define ABOVE_SUIT_STORE_LAYER		SUIT_STORE_LAYER-1
-#define ABOVE_BACK_LAYER			BACK_LAYER-1
-#define ABOVE_HAIR_LAYER			HAIR_LAYER-1
-#define ABOVE_FACEMASK_LAYER		FACEMASK_LAYER-1
-#define ABOVE_HEAD_LAYER			HEAD_LAYER-1
-#define ABOVE_HANDCUFF_LAYER		HANDCUFF_LAYER-1
-#define ABOVE_LEGCUFF_LAYER			LEGCUFF_LAYER-1
-#define ABOVE_HANDS_LAYER			HANDS_LAYER-1
 #define ABOVE_BODY_FRONT_LAYER		BODY_FRONT_LAYER-1
-#define ABOVE_FIRE_LAYER			FIRE_LAYER-1
 
 
 //Security levels
@@ -195,7 +147,6 @@ Will print: "/mob/living/carbon/human/death" (you can optionally embed it in a s
 #define AI_MECH_HACK		3 //Malfunctioning AI hijacking mecha
 
 //check_target_facings() return defines
-#define FACING_FAILED											0
 #define FACING_SAME_DIR											1
 #define FACING_EACHOTHER										2
 #define FACING_INIT_FACING_TARGET_TARGET_FACING_PERPENDICULAR	3 //Do I win the most informative but also most stupid define award?
@@ -213,7 +164,6 @@ GLOBAL_LIST_EMPTY(bloody_footprints_cache)
 #define BLOOD_GAIN_PER_STEP			100
 #define BLOOD_LOSS_PER_STEP			5
 #define BLOOD_LOSS_IN_SPREAD		20
-#define BLOOD_FADEOUT_TIME			2
 
 //Bloody shoe blood states
 #define BLOOD_STATE_HUMAN			"blood"
@@ -241,7 +191,6 @@ GLOBAL_LIST_EMPTY(bloody_footprints_cache)
 #define TURF_WET_LUBE	2
 #define TURF_WET_ICE	3
 #define TURF_WET_PERMAFROST 4
-#define TURF_WET_SLIDE	5
 
 //Maximum amount of time, (in approx. seconds.) a tile can be wet for.
 #define MAXIMUM_WET_TIME 300
@@ -309,10 +258,8 @@ GLOBAL_LIST_INIT(ghost_others_options, list(GHOST_OTHERS_SIMPLE, GHOST_OTHERS_DE
 /////////////////////////////////////
 // atom.appearence_flags shortcuts //
 /////////////////////////////////////
-//this was added midway thru 510, so it might not exist in some versions, but we can't check by minor verison
-#ifndef TILE_BOUND
-#error this version of 510 is too old, You must use byond 510.1332 or later. (TILE_BOUND is not defined)
-#endif
+
+/*
 
 // Disabling certain features
 #define APPEARANCE_IGNORE_TRANSFORM			RESET_TRANSFORM
@@ -330,12 +277,7 @@ GLOBAL_LIST_INIT(ghost_others_options, list(GHOST_OTHERS_SIMPLE, GHOST_OTHERS_DE
 #define APPEARANCE_CONSIDER_ALPHA			~RESET_ALPHA
 #define APPEARANCE_LONG_GLIDE				LONG_GLIDE
 
-#ifndef PIXEL_SCALE
-#define PIXEL_SCALE 0
-#if DM_VERSION >= 512
-#error HEY, PIXEL_SCALE probably exists now, remove this gross ass shim.
-#endif
-#endif
+*/
 
 // Consider these images/atoms as part of the UI/HUD
 #define APPEARANCE_UI_IGNORE_ALPHA			RESET_COLOR|RESET_TRANSFORM|NO_CLIENT_COLOR|RESET_ALPHA|PIXEL_SCALE
@@ -417,14 +359,6 @@ GLOBAL_LIST_INIT(ghost_others_options, list(GHOST_OTHERS_SIMPLE, GHOST_OTHERS_DE
 #define CLOCK_PROSELYTIZATION 23
 #define SHUTTLE_HIJACK 24
 
-#define TURF_DECAL_PAINT "paint"
-#define TURF_DECAL_DAMAGE "damage"
-#define TURF_DECAL_DIRT "dirt"
-
-//Error handler defines
-#define ERROR_USEFUL_LEN 2
-
-#define NO_FIELD 0
 #define FIELD_TURF 1
 #define FIELD_EDGE 2
 
diff --git a/code/__DEFINES/mobs.dm b/code/__DEFINES/mobs.dm
index 867d2a264c..7af6fecce2 100644
--- a/code/__DEFINES/mobs.dm
+++ b/code/__DEFINES/mobs.dm
@@ -118,7 +118,7 @@
 //Sentience types, to prevent things like sentience potions from giving bosses sentience
 #define SENTIENCE_ORGANIC 1
 #define SENTIENCE_ARTIFICIAL 2
-#define SENTIENCE_OTHER 3
+// #define SENTIENCE_OTHER 3 unused
 #define SENTIENCE_MINEBOT 4
 #define SENTIENCE_BOSS 5
 
@@ -137,29 +137,6 @@
 #define ENVIRONMENT_SMASH_WALLS 2   //walls
 #define ENVIRONMENT_SMASH_RWALLS 4  //rwalls
 
-
-//SNPCs
-//AI defines
-#define INTERACTING 2
-#define TRAVEL 4
-#define FIGHTING 8
-//Trait defines
-#define TRAIT_ROBUST 2
-#define TRAIT_UNROBUST 4
-#define TRAIT_SMART 8
-#define TRAIT_DUMB 16
-#define TRAIT_MEAN 32
-#define TRAIT_FRIENDLY 64
-#define TRAIT_THIEVING 128
-//Range/chance defines
-#define MAX_RANGE_FIND 32
-#define MIN_RANGE_FIND 16
-#define FUZZY_CHANCE_HIGH 85
-#define FUZZY_CHANCE_LOW 50
-#define CHANCE_TALK 1
-
-#define TK_MAXRANGE 15
-
 #define NO_SLIP_WHEN_WALKING 1
 #define SLIDE 2
 #define GALOSHES_DONT_HELP 4
diff --git a/code/__DEFINES/radio.dm b/code/__DEFINES/radio.dm
index e38fe9954b..97935d58b7 100644
--- a/code/__DEFINES/radio.dm
+++ b/code/__DEFINES/radio.dm
@@ -1,56 +1,55 @@
-// Radios use a large variety of predefined frequencies.
-
-#define MIN_FREE_FREQ 1201 // -------------------------------------------------
-// Frequencies are always odd numbers and range from 1201 to 1599.
-
-#define FREQ_SYNDICATE 1213  // Nuke op comms frequency, dark brown
-#define FREQ_CTF_RED 1215  // CTF red team comms frequency, red
-#define FREQ_CTF_BLUE 1217  // CTF blue team comms frequency, blue
-#define FREQ_CENTCOM 1337  // CentCom comms frequency, gray
-#define FREQ_SUPPLY 1347  // Supply comms frequency, light brown
-#define FREQ_SERVICE 1349  // Service comms frequency, green
-#define FREQ_SCIENCE 1351  // Science comms frequency, plum
-#define FREQ_COMMAND 1353  // Command comms frequency, gold
-#define FREQ_MEDICAL 1355  // Medical comms frequency, soft blue
-#define FREQ_ENGINEERING 1357  // Engineering comms frequency, orange
-#define FREQ_SECURITY 1359  // Security comms frequency, red
-
-#define FREQ_STATUS_DISPLAYS 1435
-#define FREQ_ATMOS_ALARMS 1437  // air alarms <-> alert computers
-#define FREQ_ATMOS_CONTROL 1439  // air alarms <-> vents and scrubbers
-
-#define MIN_FREQ 1441 // ------------------------------------------------------
-// Only the 1441 to 1489 range is freely available for general conversation.
-// This represents 1/8th of the available spectrum.
-
-#define FREQ_ATMOS_STORAGE 1441
-#define FREQ_NAV_BEACON 1445
-#define FREQ_AI_PRIVATE 1447  // AI private comms frequency, magenta
-#define FREQ_PRESSURE_PLATE 1447
-#define FREQ_AIRLOCK_CONTROL 1449
-#define FREQ_ELECTROPACK 1449
-#define FREQ_MAGNETS 1449
-#define FREQ_LOCATOR_IMPLANT 1451
-#define FREQ_SIGNALER 1457  // the default for new signalers
-#define FREQ_COMMON 1459  // Common comms frequency, dark green
-
-#define MAX_FREQ 1489 // ------------------------------------------------------
-
-#define MAX_FREE_FREQ 1599 // -------------------------------------------------
-
-// Transmission types.
-#define TRANSMISSION_WIRE 0  // some sort of wired connection, not used
-#define TRANSMISSION_RADIO 1  // electromagnetic radiation (default)
-#define TRANSMISSION_SUBSPACE 2  // subspace transmission (headsets only)
-#define TRANSMISSION_SUPERSPACE 3  // reaches independent (CentCom) radios only
-
-// Filter types, used as an optimization to avoid unnecessary proc calls.
-#define RADIO_TO_AIRALARM "to_airalarm"
-#define RADIO_FROM_AIRALARM "from_airalarm"
-#define RADIO_SIGNALER "signaler"
-#define RADIO_ATMOSIA "atmosia"
-#define RADIO_NAVBEACONS "navbeacons"
-#define RADIO_AIRLOCK "airlock"
-#define RADIO_MAGNETS "magnets"
-
-#define DEFAULT_SIGNALER_CODE 30
+// Radios use a large variety of predefined frequencies.
+
+#define MIN_FREE_FREQ 1201 // -------------------------------------------------
+// Frequencies are always odd numbers and range from 1201 to 1599.
+
+#define FREQ_SYNDICATE 1213  // Nuke op comms frequency, dark brown
+#define FREQ_CTF_RED 1215  // CTF red team comms frequency, red
+#define FREQ_CTF_BLUE 1217  // CTF blue team comms frequency, blue
+#define FREQ_CENTCOM 1337  // CentCom comms frequency, gray
+#define FREQ_SUPPLY 1347  // Supply comms frequency, light brown
+#define FREQ_SERVICE 1349  // Service comms frequency, green
+#define FREQ_SCIENCE 1351  // Science comms frequency, plum
+#define FREQ_COMMAND 1353  // Command comms frequency, gold
+#define FREQ_MEDICAL 1355  // Medical comms frequency, soft blue
+#define FREQ_ENGINEERING 1357  // Engineering comms frequency, orange
+#define FREQ_SECURITY 1359  // Security comms frequency, red
+
+#define FREQ_STATUS_DISPLAYS 1435
+#define FREQ_ATMOS_ALARMS 1437  // air alarms <-> alert computers
+#define FREQ_ATMOS_CONTROL 1439  // air alarms <-> vents and scrubbers
+
+#define MIN_FREQ 1441 // ------------------------------------------------------
+// Only the 1441 to 1489 range is freely available for general conversation.
+// This represents 1/8th of the available spectrum.
+
+#define FREQ_ATMOS_STORAGE 1441
+#define FREQ_NAV_BEACON 1445
+#define FREQ_AI_PRIVATE 1447  // AI private comms frequency, magenta
+#define FREQ_PRESSURE_PLATE 1447
+#define FREQ_AIRLOCK_CONTROL 1449
+#define FREQ_ELECTROPACK 1449
+#define FREQ_MAGNETS 1449
+#define FREQ_LOCATOR_IMPLANT 1451
+#define FREQ_SIGNALER 1457  // the default for new signalers
+#define FREQ_COMMON 1459  // Common comms frequency, dark green
+
+#define MAX_FREQ 1489 // ------------------------------------------------------
+
+#define MAX_FREE_FREQ 1599 // -------------------------------------------------
+
+// Transmission types.
+#define TRANSMISSION_WIRE 0  // some sort of wired connection, not used
+#define TRANSMISSION_RADIO 1  // electromagnetic radiation (default)
+#define TRANSMISSION_SUBSPACE 2  // subspace transmission (headsets only)
+#define TRANSMISSION_SUPERSPACE 3  // reaches independent (CentCom) radios only
+
+// Filter types, used as an optimization to avoid unnecessary proc calls.
+#define RADIO_TO_AIRALARM "to_airalarm"
+#define RADIO_FROM_AIRALARM "from_airalarm"
+#define RADIO_SIGNALER "signaler"
+#define RADIO_ATMOSIA "atmosia"
+#define RADIO_AIRLOCK "airlock"
+#define RADIO_MAGNETS "magnets"
+
+#define DEFAULT_SIGNALER_CODE 30
diff --git a/code/__DEFINES/shuttles.dm b/code/__DEFINES/shuttles.dm
index e3f1731a13..306f316aa5 100644
--- a/code/__DEFINES/shuttles.dm
+++ b/code/__DEFINES/shuttles.dm
@@ -31,11 +31,9 @@
 
 // Ripples, effects that signal a shuttle's arrival
 #define SHUTTLE_RIPPLE_TIME 100
-#define SHUTTLE_RIPPLE_FADEIN 50
 
 #define TRANSIT_REQUEST 1
 #define TRANSIT_READY 2
-#define TRANSIT_FULL 3
 
 #define SHUTTLE_TRANSIT_BORDER 8
 
@@ -79,4 +77,4 @@
 #define SHUTTLE_DEFAULT_TURF_TYPE /turf/open/space
 #define SHUTTLE_DEFAULT_BASETURF_TYPE /turf/open/space
 #define SHUTTLE_DEFAULT_SHUTTLE_AREA_TYPE /area/shuttle
-#define SHUTTLE_DEFAULT_UNDERLYING_AREA /area/space
\ No newline at end of file
+#define SHUTTLE_DEFAULT_UNDERLYING_AREA /area/space
diff --git a/code/__DEFINES/sight.dm b/code/__DEFINES/sight.dm
index d756cbaf1b..cfce95a65f 100644
--- a/code/__DEFINES/sight.dm
+++ b/code/__DEFINES/sight.dm
@@ -1,30 +1,30 @@
-#define SEE_INVISIBLE_MINIMUM 5
-
-#define INVISIBILITY_LIGHTING 20
-
-#define SEE_INVISIBLE_LIVING 25
-
-#define SEE_INVISIBLE_LEVEL_ONE 35 //currently unused
-#define INVISIBILITY_LEVEL_ONE 35 //currently unused
-
-#define SEE_INVISIBLE_LEVEL_TWO 45 //currently unused
-#define INVISIBILITY_LEVEL_TWO 45 //currently unused
-
-#define INVISIBILITY_OBSERVER 60
-#define SEE_INVISIBLE_OBSERVER 60
-
-#define INVISIBILITY_MAXIMUM 100 //the maximum allowed for "real" objects
-
-#define INVISIBILITY_ABSTRACT 101 //only used for abstract objects (e.g. spacevine_controller), things that are not really there.
-
-#define BORGMESON 1
-#define BORGTHERM 2
-#define BORGXRAY  4
-#define BORGMATERIAL 8
-
-//for clothing visor toggles, these determine which vars to toggle
-#define VISOR_FLASHPROTECT 1
-#define VISOR_TINT 2
-#define VISOR_VISIONFLAGS 4 //all following flags only matter for glasses
-#define VISOR_DARKNESSVIEW 8
-#define VISOR_INVISVIEW 16
+#define SEE_INVISIBLE_MINIMUM 5
+
+#define INVISIBILITY_LIGHTING 20
+
+#define SEE_INVISIBLE_LIVING 25
+
+//#define SEE_INVISIBLE_LEVEL_ONE 35 //currently unused
+//#define INVISIBILITY_LEVEL_ONE 35 //currently unused
+
+//#define SEE_INVISIBLE_LEVEL_TWO 45 //currently unused
+//#define INVISIBILITY_LEVEL_TWO 45 //currently unused
+
+#define INVISIBILITY_OBSERVER 60
+#define SEE_INVISIBLE_OBSERVER 60
+
+#define INVISIBILITY_MAXIMUM 100 //the maximum allowed for "real" objects
+
+#define INVISIBILITY_ABSTRACT 101 //only used for abstract objects (e.g. spacevine_controller), things that are not really there.
+
+#define BORGMESON 1
+#define BORGTHERM 2
+#define BORGXRAY  4
+#define BORGMATERIAL 8
+
+//for clothing visor toggles, these determine which vars to toggle
+#define VISOR_FLASHPROTECT 1
+#define VISOR_TINT 2
+#define VISOR_VISIONFLAGS 4 //all following flags only matter for glasses
+#define VISOR_DARKNESSVIEW 8
+#define VISOR_INVISVIEW 16
diff --git a/code/__DEFINES/stat.dm b/code/__DEFINES/stat.dm
index 96c72bcab2..d9d98219aa 100644
--- a/code/__DEFINES/stat.dm
+++ b/code/__DEFINES/stat.dm
@@ -15,6 +15,5 @@
 #define EMPED		8		// temporary broken by EMP pulse
 
 //ai power requirement defines
-#define POWER_REQ_NONE 0
 #define POWER_REQ_ALL 1
 #define POWER_REQ_CLOCKCULT 2
diff --git a/code/__DEFINES/status_effects.dm b/code/__DEFINES/status_effects.dm
index ea29e956b6..dc321bf63d 100644
--- a/code/__DEFINES/status_effects.dm
+++ b/code/__DEFINES/status_effects.dm
@@ -7,8 +7,6 @@
 
 #define STATUS_EFFECT_REPLACE 2 //if it allows only one, but new instances replace
 
-#define BASIC_STATUS_EFFECT /datum/status_effect //Has no effect.
-
 ///////////
 // BUFFS //
 ///////////
diff --git a/code/__HELPERS/unsorted.dm b/code/__HELPERS/unsorted.dm
index 3484389a65..a31ec4f037 100644
--- a/code/__HELPERS/unsorted.dm
+++ b/code/__HELPERS/unsorted.dm
@@ -920,7 +920,7 @@ GLOBAL_LIST_INIT(WALLITEMS_INVERSE, typecacheof(list(
 	That said, this proc should not be used if the change facing proc of the click code is overriden at the same time*/
 	if(!ismob(target) || target.lying)
 	//Make sure we are not doing this for things that can't have a logical direction to the players given that the target would be on their side
-		return FACING_FAILED
+		return FALSE
 	if(initator.dir == target.dir) //mobs are facing the same direction
 		return FACING_SAME_DIR
 	if(is_A_facing_B(initator,target) && is_A_facing_B(target,initator)) //mobs are facing each other
diff --git a/code/_globalvars/lists/poll_ignore.dm b/code/_globalvars/lists/poll_ignore.dm
index f88c4aab85..a2cba4e08f 100644
--- a/code/_globalvars/lists/poll_ignore.dm
+++ b/code/_globalvars/lists/poll_ignore.dm
@@ -1,10 +1,8 @@
 //Each lists stores ckeys for "Never for this round" option category
 
-#define POLL_IGNORE_PAI "pai"
 #define POLL_IGNORE_SENTIENCE_POTION "sentience_potion"
 #define POLL_IGNORE_POSSESSED_BLADE "possessed_blade"
 #define POLL_IGNORE_ALIEN_LARVA "alien_larva"
-#define POLL_IGNORE_CLOCKWORK_MARAUDER "clockwork_marauder"
 #define POLL_IGNORE_SYNDICATE "syndicate"
 #define POLL_IGNORE_HOLOPARASITE "holoparasite"
 
diff --git a/code/_onclick/hud/_defines.dm b/code/_onclick/hud/_defines.dm
index 6d941589d3..4ce615dd01 100644
--- a/code/_onclick/hud/_defines.dm
+++ b/code/_onclick/hud/_defines.dm
@@ -66,7 +66,7 @@
 #define ui_monkey_neck "CENTER-3:15,SOUTH:5"	//monkey
 #define ui_monkey_back "CENTER-2:16,SOUTH:5"	//monkey
 
-#define ui_alien_storage_l "CENTER-2:14,SOUTH:5"//alien
+//#define ui_alien_storage_l "CENTER-2:14,SOUTH:5"//alien
 #define ui_alien_storage_r "CENTER+1:18,SOUTH:5"//alien
 #define ui_alien_language_menu "EAST-3:26,SOUTH:5" //alien
 
diff --git a/code/_onclick/telekinesis.dm b/code/_onclick/telekinesis.dm
index 87354d6f0b..ce07b7ebb2 100644
--- a/code/_onclick/telekinesis.dm
+++ b/code/_onclick/telekinesis.dm
@@ -10,6 +10,8 @@
 	By default, emulate the user's unarmed attack
 */
 
+#define TK_MAXRANGE 15
+
 /atom/proc/attack_tk(mob/user)
 	if(user.stat || !tkMaxRangeCheck(user, src))
 		return
@@ -188,3 +190,6 @@
 /obj/item/tk_grab/suicide_act(mob/user)
 	user.visible_message("<span class='suicide'>[user] is using [user.p_their()] telekinesis to choke [user.p_them()]self! It looks like [user.p_theyre()] trying to commit suicide!</span>")
 	return (OXYLOSS)
+
+
+#undef TK_MAXRANGE
diff --git a/code/game/machinery/hologram.dm b/code/game/machinery/hologram.dm
index 264f773b89..bce12597ab 100644
--- a/code/game/machinery/hologram.dm
+++ b/code/game/machinery/hologram.dm
@@ -26,7 +26,6 @@ Possible to do for anyone motivated enough:
 
 #define HOLOPAD_PASSIVE_POWER_USAGE 1
 #define HOLOGRAM_POWER_USAGE 2
-#define HOLOPAD_MODE RANGE_BASED
 
 /obj/machinery/holopad
 	name = "holopad"
diff --git a/code/game/turfs/open.dm b/code/game/turfs/open.dm
index da1f941ccc..bcd597424d 100644
--- a/code/game/turfs/open.dm
+++ b/code/game/turfs/open.dm
@@ -269,9 +269,6 @@
 		if(TURF_WET_PERMAFROST)
 			intensity = 120
 			lube_flags = SLIDE_ICE | GALOSHES_DONT_HELP
-		if(TURF_WET_SLIDE)
-			intensity = 80
-			lube_flags = SLIDE | GALOSHES_DONT_HELP
 		else
 			qdel(GetComponent(/datum/component/slippery))
 			return
diff --git a/code/modules/admin/admin_ranks.dm b/code/modules/admin/admin_ranks.dm
index 2414c55528..c915816ed0 100644
--- a/code/modules/admin/admin_ranks.dm
+++ b/code/modules/admin/admin_ranks.dm
@@ -42,9 +42,6 @@ GLOBAL_PROTECT(admin_ranks)
 /datum/admin_rank/vv_edit_var(var_name, var_value)
 	return FALSE
 
-#if DM_VERSION > 512
-#error remove the rejuv keyword from this proc
-#endif
 /proc/admin_keyword_to_flag(word, previous_rights=0)
 	var/flag = 0
 	switch(ckey(word))
@@ -80,9 +77,6 @@ GLOBAL_PROTECT(admin_ranks)
 			flag = R_AUTOLOGIN
 		if("@","prev")
 			flag = previous_rights
-		if("rejuv","rejuvinate")
-			stack_trace("Legacy keyword rejuvinate used defaulting to R_ADMIN")
-			flag = R_ADMIN
 	return flag
 
 /proc/admin_keyword_to_path(word) //use this with verb keywords eg +/client/proc/blah
diff --git a/code/modules/antagonists/cult/cult_comms.dm b/code/modules/antagonists/cult/cult_comms.dm
index 961f071b02..308cd38c80 100644
--- a/code/modules/antagonists/cult/cult_comms.dm
+++ b/code/modules/antagonists/cult/cult_comms.dm
@@ -1,5 +1,4 @@
 // Contains cult communion, guide, and cult master abilities
-#define MARK_COOLDOWN
 
 /datum/action/innate/cult
 	icon_icon = 'icons/mob/actions/actions_cult.dmi'
diff --git a/code/modules/error_handler/error_handler.dm b/code/modules/error_handler/error_handler.dm
index 91b004e0e0..304ddce7eb 100644
--- a/code/modules/error_handler/error_handler.dm
+++ b/code/modules/error_handler/error_handler.dm
@@ -2,6 +2,9 @@ GLOBAL_VAR_INIT(total_runtimes, GLOB.total_runtimes || 0)
 GLOBAL_VAR_INIT(total_runtimes_skipped, 0)
 
 #ifdef DEBUG
+
+#define ERROR_USEFUL_LEN 2
+
 /world/Error(exception/E, datum/e_src)
 	GLOB.total_runtimes++
 	
diff --git a/code/modules/fields/turf_objects.dm b/code/modules/fields/turf_objects.dm
index edb1a6ce6b..7d7454f46a 100644
--- a/code/modules/fields/turf_objects.dm
+++ b/code/modules/fields/turf_objects.dm
@@ -74,4 +74,4 @@
 				return FIELD_EDGE
 		if(O.parent == F)
 			return FIELD_TURF
-	return NO_FIELD
+	return FALSE
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index d47d68bf8b..5e4db79e89 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -20,6 +20,22 @@
 #define COLD_GAS_DAMAGE_LEVEL_2 1.5 //Amount of damage applied when the current breath's temperature passes the 200K point
 #define COLD_GAS_DAMAGE_LEVEL_3 3 //Amount of damage applied when the current breath's temperature passes the 120K point
 
+// bitflags for the percentual amount of protection a piece of clothing which covers the body part offers.
+// Used with human/proc/get_heat_protection() and human/proc/get_cold_protection()
+// The values here should add up to 1.
+// Hands and feet have 2.5%, arms and legs 7.5%, each of the torso parts has 15% and the head has 30%
+#define THERMAL_PROTECTION_HEAD			0.3
+#define THERMAL_PROTECTION_CHEST		0.15
+#define THERMAL_PROTECTION_GROIN		0.15
+#define THERMAL_PROTECTION_LEG_LEFT		0.075
+#define THERMAL_PROTECTION_LEG_RIGHT	0.075
+#define THERMAL_PROTECTION_FOOT_LEFT	0.025
+#define THERMAL_PROTECTION_FOOT_RIGHT	0.025
+#define THERMAL_PROTECTION_ARM_LEFT		0.075
+#define THERMAL_PROTECTION_ARM_RIGHT	0.075
+#define THERMAL_PROTECTION_HAND_LEFT	0.025
+#define THERMAL_PROTECTION_HAND_RIGHT	0.025
+
 /mob/living/carbon/human/Life()
 	set invisibility = 0
 	if (notransform)
@@ -424,3 +440,14 @@ GLOBAL_LIST_INIT(ballmer_windows_me_msg, list("Yo man, what if, we like, uh, put
 			adjustToxLoss(4) //Let's be honest you shouldn't be alive by now
 
 #undef HUMAN_MAX_OXYLOSS
+#undef THERMAL_PROTECTION_HEAD
+#undef THERMAL_PROTECTION_CHEST
+#undef THERMAL_PROTECTION_GROIN
+#undef THERMAL_PROTECTION_LEG_LEFT
+#undef THERMAL_PROTECTION_LEG_RIGHT
+#undef THERMAL_PROTECTION_FOOT_LEFT
+#undef THERMAL_PROTECTION_FOOT_RIGHT
+#undef THERMAL_PROTECTION_ARM_LEFT
+#undef THERMAL_PROTECTION_ARM_RIGHT
+#undef THERMAL_PROTECTION_HAND_LEFT
+#undef THERMAL_PROTECTION_HAND_RIGHT
\ No newline at end of file
diff --git a/code/modules/mob/living/carbon/monkey/combat.dm b/code/modules/mob/living/carbon/monkey/combat.dm
index 32b368db4f..79c9613906 100644
--- a/code/modules/mob/living/carbon/monkey/combat.dm
+++ b/code/modules/mob/living/carbon/monkey/combat.dm
@@ -1,3 +1,4 @@
+#define MAX_RANGE_FIND 32
 
 /mob/living/carbon/monkey
 	var/aggressive=0 // set to 1 using VV for an angry monkey
@@ -475,3 +476,5 @@
 	if(A)
 		dropItemToGround(A, TRUE)
 		update_icons()
+
+#undef MAX_RANGE_FIND
diff --git a/code/modules/mob/living/silicon/ai/life.dm b/code/modules/mob/living/silicon/ai/life.dm
index 97034d389c..ae95a317a3 100644
--- a/code/modules/mob/living/silicon/ai/life.dm
+++ b/code/modules/mob/living/silicon/ai/life.dm
@@ -50,7 +50,7 @@
 	var/turf/T = get_turf(src)
 	var/area/A = get_area(src)
 	switch(requires_power)
-		if(POWER_REQ_NONE)
+		if(NONE)
 			return FALSE
 		if(POWER_REQ_ALL)
 			return !T || !A || ((!A.power_equip || isspaceturf(T)) && !is_type_in_list(loc, list(/obj/item, /obj/mecha)))
diff --git a/code/modules/mob/living/silicon/ai/say.dm b/code/modules/mob/living/silicon/ai/say.dm
index b55fa2a663..75f0fb5e81 100644
--- a/code/modules/mob/living/silicon/ai/say.dm
+++ b/code/modules/mob/living/silicon/ai/say.dm
@@ -154,6 +154,7 @@
 		return 1
 	return 0
 
+#undef VOX_DELAY
 #endif
 
 /mob/living/silicon/ai/could_speak_in_language(datum/language/dt)
diff --git a/code/modules/ninja/__ninjaDefines.dm b/code/modules/ninja/__ninjaDefines.dm
index 352087f4e8..1a3e9dce63 100644
--- a/code/modules/ninja/__ninjaDefines.dm
+++ b/code/modules/ninja/__ninjaDefines.dm
@@ -18,7 +18,6 @@ Contents:
 
 #define INVALID_DRAIN			"INVALID" //This one is if the drain proc needs to cancel, eg missing variables, etc, it's important.
 
-#define DRAIN_RD_HACKED			"RDHACK"
 #define DRAIN_RD_HACK_FAILED	"RDHACKFAIL"
 #define DRAIN_MOB_SHOCK			"MOBSHOCK"
 #define DRAIN_MOB_SHOCK_FAILED	"MOBSHOCKFAIL"
\ No newline at end of file
diff --git a/code/modules/power/singularity/field_generator.dm b/code/modules/power/singularity/field_generator.dm
index 45149d1346..d160209e0c 100644
--- a/code/modules/power/singularity/field_generator.dm
+++ b/code/modules/power/singularity/field_generator.dm
@@ -18,6 +18,11 @@ field_generator power level display
 #define FG_CHARGING 1
 #define FG_ONLINE 2
 
+//field generator construction defines
+#define FG_UNSECURED 0
+#define FG_SECURED 1
+#define FG_WELDED 2
+
 /obj/machinery/field/generator
 	name = "field generator"
 	desc = "A large thermal battery that projects a high amount of energy when powered."
diff --git a/code/modules/power/turbine.dm b/code/modules/power/turbine.dm
index 5c463b4ee9..d01a331364 100644
--- a/code/modules/power/turbine.dm
+++ b/code/modules/power/turbine.dm
@@ -81,14 +81,8 @@
 
 
 #define COMPFRICTION 5e5
-#define COMPSTARTERLOAD 2800
 
 
-// Crucial to make things work!!!!
-// OLD FIX - explanation given down below.
-// /obj/machinery/power/compressor/CanPass(atom/movable/mover, turf/target)
-// 		return !density
-
 /obj/machinery/power/compressor/locate_machinery()
 	if(turbine)
 		return
@@ -169,7 +163,6 @@
 // These are crucial to working of a turbine - the stats modify the power output. TurbGenQ modifies how much raw energy can you get from
 // rpms, TurbGenG modifies the shape of the curve - the lower the value the less straight the curve is.
 
-#define TURBPRES 9000000
 #define TURBGENQ 100000
 #define TURBGENG 0.5
 
@@ -370,3 +363,7 @@
 		if("reconnect")
 			locate_machinery()
 			. = TRUE
+
+#undef COMPFRICTION
+#undef TURBGENQ
+#undef TURBGENG
\ No newline at end of file
diff --git a/code/modules/projectiles/gun.dm b/code/modules/projectiles/gun.dm
index a1de4db477..0a2503fd5d 100644
--- a/code/modules/projectiles/gun.dm
+++ b/code/modules/projectiles/gun.dm
@@ -27,7 +27,7 @@
 	var/obj/item/ammo_casing/chambered = null
 	trigger_guard = TRIGGER_GUARD_NORMAL	//trigger guard on the weapon, hulks can't fire them with their big meaty fingers
 	var/sawn_desc = null				//description change if weapon is sawn-off
-	var/sawn_state = SAWN_INTACT
+	var/sawn_off = FALSE
 	var/burst_size = 1					//how large a burst is
 	var/fire_delay = 0					//rate of fire for burst firing and semi auto
 	var/firing_burst = 0				//Prevent the weapon from firing again while already firing
diff --git a/code/modules/projectiles/guns/ballistic.dm b/code/modules/projectiles/guns/ballistic.dm
index c16c5f0fc0..f7cb05486f 100644
--- a/code/modules/projectiles/guns/ballistic.dm
+++ b/code/modules/projectiles/guns/ballistic.dm
@@ -21,9 +21,9 @@
 /obj/item/gun/ballistic/update_icon()
 	..()
 	if(current_skin)
-		icon_state = "[unique_reskin[current_skin]][suppressed ? "-suppressed" : ""][sawn_state ? "-sawn" : ""]"
+		icon_state = "[unique_reskin[current_skin]][suppressed ? "-suppressed" : ""][sawn_off ? "-sawn" : ""]"
 	else
-		icon_state = "[initial(icon_state)][suppressed ? "-suppressed" : ""][sawn_state ? "-sawn" : ""]"
+		icon_state = "[initial(icon_state)][suppressed ? "-suppressed" : ""][sawn_off ? "-sawn" : ""]"
 
 
 /obj/item/gun/ballistic/process_chamber(empty_chamber = 1)
@@ -185,7 +185,7 @@
 
 
 /obj/item/gun/ballistic/proc/sawoff(mob/user)
-	if(sawn_state == SAWN_OFF)
+	if(sawn_off)
 		to_chat(user, "<span class='warning'>\The [src] is already shortened!</span>")
 		return
 	user.changeNext_move(CLICK_CD_MELEE)
@@ -197,7 +197,7 @@
 		return
 
 	if(do_after(user, 30, target = src))
-		if(sawn_state == SAWN_OFF)
+		if(sawn_off)
 			return
 		user.visible_message("[user] shortens \the [src]!", "<span class='notice'>You shorten \the [src].</span>")
 		name = "sawn-off [src.name]"
@@ -206,7 +206,7 @@
 		item_state = "gun"
 		slot_flags &= ~SLOT_BACK	//you can't sling it on your back
 		slot_flags |= SLOT_BELT		//but you can wear it on your belt (poorly concealed under a trenchcoat, ideally)
-		sawn_state = SAWN_OFF
+		sawn_off = TRUE
 		update_icon()
 		return 1
 
diff --git a/code/modules/projectiles/guns/ballistic/revolver.dm b/code/modules/projectiles/guns/ballistic/revolver.dm
index 14e529ba23..489f88ffad 100644
--- a/code/modules/projectiles/guns/ballistic/revolver.dm
+++ b/code/modules/projectiles/guns/ballistic/revolver.dm
@@ -311,7 +311,7 @@
 
 /obj/item/gun/ballistic/revolver/doublebarrel/improvised/attackby(obj/item/A, mob/user, params)
 	..()
-	if(istype(A, /obj/item/stack/cable_coil) && !sawn_state)
+	if(istype(A, /obj/item/stack/cable_coil) && !sawn_off)
 		var/obj/item/stack/cable_coil/C = A
 		if(C.use(10))
 			slot_flags = SLOT_BACK
@@ -339,7 +339,7 @@
 	icon_state = "ishotgun"
 	item_state = "gun"
 	w_class = WEIGHT_CLASS_NORMAL
-	sawn_state = SAWN_OFF
+	sawn_off = TRUE
 	slot_flags = SLOT_BELT
 
 
diff --git a/html/changelogs/AutoChangeLog-pr-5788.yml b/html/changelogs/AutoChangeLog-pr-5788.yml
new file mode 100644
index 0000000000..2f5d1bdd2d
--- /dev/null
+++ b/html/changelogs/AutoChangeLog-pr-5788.yml
@@ -0,0 +1,4 @@
+author: "Naksu"
+delete-after: True
+changes: 
+  - code_imp: "First pass on cleaning up junk defines and unused code"