stop this nonsense

code/__HELPERS/angles.dm

@@ -16,7 +16,7 @@
 
 /proc/Get_Angle(atom/movable/start,atom/movable/end)//For beams.
 	if(!start || !end)
-		return 0
+		return FALSE
 	var/dy
 	var/dx
 	dy=(32*end.y+end.pixel_y)-(32*start.y+start.pixel_y)

code/__HELPERS/files.dm

@@ -45,12 +45,12 @@
 	var/time_to_wait = GLOB.fileaccess_timer - world.time
 	if(time_to_wait > 0)
 		to_chat(src, "<font color='red'>Error: file_spam_check(): Spam. Please wait [DisplayTimeText(time_to_wait)].</font>")
-		return 1
+		return TRUE
 	var/delay = FTPDELAY
 	if(holder)
 		delay *= ADMIN_FTPDELAY_MODIFIER
 	GLOB.fileaccess_timer = world.time + delay
-	return 0
+	return FALSE
 #undef FTPDELAY
 #undef ADMIN_FTPDELAY_MODIFIER
 

code/__HELPERS/game.dm

@@ -97,8 +97,8 @@
 		if(C == must_be_alone)
 			continue
 		if(our_area == get_area(C))
-			return 0
+			return FALSE
-	return 1
+	return TRUE
 
 //We used to use linear regression to approximate the answer, but Mloc realized this was actually faster.
 //And lo and behold, it is, and it's more accurate to boot.
@@ -310,14 +310,14 @@
 	var/turf/T
 	if(X1==X2)
 		if(Y1==Y2)
-			return 1 //Light cannot be blocked on same tile
+			return TRUE //Light cannot be blocked on same tile
 		else
 			var/s = SIGN(Y2-Y1)
 			Y1+=s
 			while(Y1!=Y2)
 				T=locate(X1,Y1,Z)
 				if(T.opacity)
-					return 0
+					return FALSE
 				Y1+=s
 	else
 		var/m=(32*(Y2-Y1)+(PY2-PY1))/(32*(X2-X1)+(PX2-PX1))
@@ -333,8 +333,8 @@
 				X1+=signX //Line exits tile horizontally
 			T=locate(X1,Y1,Z)
 			if(T.opacity)
-				return 0
+				return FALSE
-	return 1
+	return TRUE
 #undef SIGNV
 
 
@@ -343,13 +343,13 @@
 	var/turf/Bturf = get_turf(B)
 
 	if(!Aturf || !Bturf)
-		return 0
+		return FALSE
 
 	if(inLineOfSight(Aturf.x,Aturf.y, Bturf.x,Bturf.y,Aturf.z))
-		return 1
+		return TRUE
 
 	else
-		return 0
+		return FALSE
 
 
 /proc/get_cardinal_step_away(atom/start, atom/finish) //returns the position of a step from start away from finish, in one of the cardinal directions

code/__HELPERS/heap.dm

@@ -29,7 +29,7 @@
 //(i.e the max or the min dependant on the comparison function)
 /datum/heap/proc/pop()
 	if(!length(L))
-		return 0
+		return FALSE
 	. = L[1]
 
 	L[1] = L[length(L)]
@@ -60,7 +60,7 @@
 //or 0 if there's no child
 /datum/heap/proc/get_greater_child(index)
 	if(index * 2 > length(L))
-		return 0
+		return FALSE
 
 	if(index * 2 + 1 > length(L))
 		return index * 2

code/__HELPERS/icon_smoothing.dm

@@ -56,7 +56,7 @@
 
 /proc/calculate_adjacencies(atom/A)
 	if(!A.loc)
-		return 0
+		return FALSE
 
 	var/adjacencies = 0
 
@@ -64,7 +64,7 @@
 	if(ismovable(A))
 		AM = A
 		if(AM.can_be_unanchored && !AM.anchored)
-			return 0
+			return FALSE
 
 	for(var/direction in GLOB.cardinals)
 		AM = find_type_in_direction(A, direction)
@@ -374,7 +374,7 @@
 		if(N_SOUTH|N_EAST|N_SOUTHEAST)
 			return SOUTHEAST
 		else
-			return 0
+			return FALSE
 
 //SSicon_smooth
 /proc/queue_smooth_neighbors(atom/A)

code/__HELPERS/icons.dm

@@ -1027,15 +1027,15 @@ GLOBAL_LIST_EMPTY(friendly_animal_types)
 //Returns the same icon specifed in the argument, but with the pixel drawn
 /proc/DrawPixel(icon/I,colour,drawX,drawY)
 	if(!I)
-		return 0
+		return FALSE
 
 	var/Iwidth = I.Width()
 	var/Iheight = I.Height()
 
 	if(drawX > Iwidth || drawX <= 0)
-		return 0
+		return FALSE
 	if(drawY > Iheight || drawY <= 0)
-		return 0
+		return FALSE
 
 	I.DrawBox(colour,drawX, drawY)
 	return I
@@ -1048,7 +1048,7 @@ GLOBAL_LIST_EMPTY(friendly_animal_types)
 	if(J) //Only set the icon if it succeeded, the icon without the pixel is 1000x better than a black square.
 		icon = J
 		return J
-	return 0
+	return FALSE
 
 //For creating consistent icons for human looking simple animals
 /proc/get_flat_human_icon(icon_id, datum/job/J, datum/preferences/prefs, dummy_key, showDirs = GLOB.cardinals, outfit_override = null, no_anim = FALSE)

code/__HELPERS/sorts/__main.dm

@@ -138,7 +138,7 @@ GLOBAL_DATUM_INIT(sortInstance, /datum/sortInstance, new())
 
 	var/runHi = lo + 1
 	if(runHi >= hi)
-		return 1
+		return TRUE
 
 	var/last = fetchElement(L,lo)
 	var/current = fetchElement(L,runHi++)

code/__HELPERS/text.dm

@@ -228,15 +228,15 @@
 /proc/text_in_list(haystack, list/needle_list, start=1, end=0)
 	for(var/needle in needle_list)
 		if(findtext(haystack, needle, start, end))
-			return 1
+			return TRUE
-	return 0
+	return FALSE
 
 //Like above, but case sensitive
 /proc/text_in_list_case(haystack, list/needle_list, start=1, end=0)
 	for(var/needle in needle_list)
 		if(findtextEx(haystack, needle, start, end))
-			return 1
+			return TRUE
-	return 0
+	return FALSE
 
 //Adds 'char' ahead of 'text' until there are 'count' characters total
 /proc/add_leading(text, count, char = " ")
@@ -301,7 +301,7 @@
 			else if(b == replace) //if B is the replacement char
 				newtext = copytext(newtext, 1, newtext_it) + a + copytext(newtext, newtext_it + length(newtext[newtext_it]))
 			else //The lists disagree, Uh-oh!
-				return 0
+				return FALSE
 		text_it += length(a)
 		comp_it += length(b)
 		newtext_it += length(newtext[newtext_it])
@@ -311,7 +311,7 @@
 //This proc returns the number of chars of the string that is the character
 //This is used for detective work to determine fingerprint completion.
 	if(!text || !character)
-		return 0
+		return FALSE
 	var/count = 0
 	var/lentext = length(text)
 	var/a = ""
@@ -403,7 +403,7 @@ GLOBAL_LIST_INIT(binary, list("0","1"))
 		. = findtextEx(haystack, char, start, end)
 		if(.)
 			return
-	return 0
+	return FALSE
 
 /proc/parsemarkdown_basic_step1(t, limited=FALSE)
 	if(length(t) <= 0)

code/__HELPERS/time.dm

@@ -14,7 +14,7 @@
 		var/MM = text2num(time2text(world.timeofday, "MM")) // get the current month
 		var/DD = text2num(time2text(world.timeofday, "DD")) // get the current day
 		if(month == MM && day == DD)
-			return 1
+			return TRUE
 
 //returns timestamp in a sql and a not-quite-compliant ISO 8601 friendly format
 /proc/SQLtime(timevar)
@@ -41,7 +41,7 @@ GLOBAL_VAR_INIT(rollovercheck_last_timeofday, 0)
 		if(28 to INFINITY)
 			return 5
 		else
-			return 1
+			return TRUE
 
 //Takes a value of time in deciseconds.
 //Returns a text value of that number in hours, minutes, or seconds.

code/__HELPERS/type2type.dm

@@ -158,7 +158,7 @@
 /proc/dir2angle(D)
 	switch(D)
 		if(NORTH)
-			return 0
+			return FALSE
 		if(SOUTH)
 			return 180
 		if(EAST)
@@ -301,7 +301,7 @@
 /proc/unix2date(timestamp, seperator = "-")
 
 	if(timestamp < 0)
-		return 0 //Do not accept negative values
+		return FALSE //Do not accept negative values
 
 	var/year = 1970 //Unix Epoc begins 1970-01-01
 	var/dayInSeconds = 86400 //60secs*60mins*24hours
@@ -363,7 +363,7 @@
 	var/list/covered_parts = list()
 
 	if(!bpc)
-		return 0
+		return FALSE
 
 	if(bpc & FULL_BODY)
 		covered_parts |= list(BODY_ZONE_L_ARM,BODY_ZONE_R_ARM,BODY_ZONE_HEAD,BODY_ZONE_CHEST,BODY_ZONE_L_LEG,BODY_ZONE_R_LEG)
@@ -557,7 +557,7 @@
 //assumes format #RRGGBB #rrggbb
 /proc/color_hex2num(A)
 	if(!A || length(A) != length_char(A))
-		return 0
+		return FALSE
 	var/R = hex2num(copytext(A, 2, 4))
 	var/G = hex2num(copytext(A, 4, 6))
 	var/B = hex2num(copytext(A, 6, 0))

code/__HELPERS/unsorted.dm

@@ -394,7 +394,7 @@ Turf and target are separate in case you want to teleport some distance from a t
 /proc/get_edge_target_turf(atom/A, direction)
 	var/turf/target = locate(A.x, A.y, A.z)
 	if(!A || !target)
-		return 0
+		return FALSE
 		//since NORTHEAST == NORTH|EAST, etc, doing it this way allows for diagonal mass drivers in the future
 		//and isn't really any more complicated
 
@@ -512,35 +512,35 @@ Turf and target are separate in case you want to teleport some distance from a t
 		current = get_step_towards(current, target_turf)
 		while(current != target_turf)
 			if(steps > length)
-				return 0
+				return FALSE
 			if(current.opacity)
-				return 0
+				return FALSE
 			for(var/thing in current)
 				var/atom/A = thing
 				if(A.opacity)
-					return 0
+					return FALSE
 			current = get_step_towards(current, target_turf)
 			steps++
 
-	return 1
+	return TRUE
 
 /proc/is_blocked_turf(turf/T, exclude_mobs)
 	if(T.density)
-		return 1
+		return TRUE
 	for(var/i in T)
 		var/atom/A = i
 		if(A.density && (!exclude_mobs || !ismob(A)))
-			return 1
+			return TRUE
-	return 0
+	return FALSE
 
 /proc/is_anchored_dense_turf(turf/T) //like the older version of the above, fails only if also anchored
 	if(T.density)
-		return 1
+		return TRUE
 	for(var/i in T)
 		var/atom/movable/A = i
 		if(A.density && A.anchored)
-			return 1
+			return TRUE
-	return 0
+	return FALSE
 
 /proc/get_step_towards2(atom/ref , atom/trg)
 	var/base_dir = get_dir(ref, get_step_towards(ref,trg))
@@ -577,9 +577,9 @@ Turf and target are separate in case you want to teleport some distance from a t
 //Returns: 1 if found, 0 if not.
 /proc/hasvar(datum/A, varname)
 	if(A.vars.Find(lowertext(varname)))
-		return 1
+		return TRUE
 	else
-		return 0
+		return FALSE
 
 /proc/get_cardinal_dir(atom/A, atom/B)
 	var/dx = abs(B.x - A.x)
@@ -700,7 +700,7 @@ Turf and target are separate in case you want to teleport some distance from a t
 //of course mathematically this is just adding world.icon_size on again
 /proc/getPixelDistance(atom/A, atom/B, centered = TRUE)
 	if(!istype(A)||!istype(B))
-		return 0
+		return FALSE
 	. = bounds_dist(A, B) + sqrt((((A.pixel_x+B.pixel_x)**2) + ((A.pixel_y+B.pixel_y)**2)))
 	if(centered)
 		. += world.icon_size
@@ -741,28 +741,28 @@ GLOBAL_LIST_INIT(WALLITEMS_INVERSE, typecacheof(list(
 			//Direction works sometimes
 			if(is_type_in_typecache(O, GLOB.WALLITEMS_INVERSE))
 				if(O.dir == turn(dir, 180))
-					return 1
+					return TRUE
 			else if(O.dir == dir)
-				return 1
+				return TRUE
 
 			//Some stuff doesn't use dir properly, so we need to check pixel instead
 			//That's exactly what get_turf_pixel() does
 			if(get_turf_pixel(O) == locdir)
-				return 1
+				return TRUE
 
 		if(is_type_in_typecache(O, GLOB.WALLITEMS_EXTERNAL) && check_external)
 			if(is_type_in_typecache(O, GLOB.WALLITEMS_INVERSE))
 				if(O.dir == turn(dir, 180))
-					return 1
+					return TRUE
 			else if(O.dir == dir)
-				return 1
+				return TRUE
 
 	//Some stuff is placed directly on the wallturf (signs)
 	for(var/obj/O in locdir)
 		if(is_type_in_typecache(O, GLOB.WALLITEMS) && check_external != 2)
 			if(O.pixel_x == 0 && O.pixel_y == 0)
-				return 1
+				return TRUE
-	return 0
+	return FALSE
 
 /proc/check_target_facings(mob/living/initator, mob/living/target)
 	/*This can be used to add additional effects on interactions between mobs depending on how the mobs are facing each other, such as adding a crit damage to blows to the back of a guy's head.
@@ -835,25 +835,25 @@ GLOBAL_LIST_INIT(WALLITEMS_INVERSE, typecacheof(list(
 /proc/IsValidSrc(datum/D)
 	if(istype(D))
 		return !QDELETED(D)
-	return 0
+	return FALSE
 
 //Compare A's dir, the clockwise dir of A and the anticlockwise dir of A
 //To the opposite dir of the dir returned by get_dir(B,A)
 //If one of them is a match, then A is facing B
 /proc/is_A_facing_B(atom/A,atom/B)
 	if(!istype(A) || !istype(B))
-		return 0
+		return FALSE
 	if(isliving(A))
 		var/mob/living/LA = A
 		if(LA.lying)
-			return 0
+			return FALSE
 	var/goal_dir = get_dir(A,B)
 	var/clockwise_A_dir = turn(A.dir, -45)
 	var/anticlockwise_A_dir = turn(A.dir, 45)
 
 	if(A.dir == goal_dir || clockwise_A_dir == goal_dir || anticlockwise_A_dir == goal_dir)
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 
 /*
@@ -1046,10 +1046,10 @@ B --><-- A
 
 /atom/proc/contains(var/atom/A)
 	if(!A)
-		return 0
+		return FALSE
 	for(var/atom/location = A.loc, location, location = location.loc)
 		if(location == src)
-			return 1
+			return TRUE
 
 /proc/flick_overlay_static(O, atom/A, duration)
 	set waitfor = 0
@@ -1149,7 +1149,7 @@ GLOBAL_REAL_VAR(list/stack_trace_storage)
 /proc/stoplag(initial_delay)
 	if (!Master || !(Master.current_runlevel & RUNLEVELS_DEFAULT))
 		sleep(world.tick_lag)
-		return 1
+		return TRUE
 	if (!initial_delay)
 		initial_delay = world.tick_lag
 	. = 0
@@ -1568,11 +1568,11 @@ GLOBAL_DATUM_INIT(dview_mob, /mob/dview, new)
 
 /proc/num2sign(numeric)
 	if(numeric > 0)
-		return 1
+		return TRUE
 	else if(numeric < 0)
 		return -1
 	else
-		return 0
+		return FALSE
 
 // Converts browser keycodes to BYOND keycodes.
 /proc/browser_keycode_to_byond(keycode)

code/_onclick/adjacent.dm

@@ -11,7 +11,7 @@
 	to check that the mob is not inside of something
 */
 /atom/proc/Adjacent(atom/neighbor) // basic inheritance, unused
-	return 0
+	return FALSE
 
 // Not a sane use of the function and (for now) indicative of an error elsewhere
 /area/Adjacent(var/atom/neighbor)
@@ -57,9 +57,9 @@
 		if(!src.ClickCross(get_dir(src,T1), border_only = 1, target_atom = target, mover = mover))
 			continue // could not enter src
 
-		return 1 // we don't care about our own density
+		return TRUE // we don't care about our own density
 
-	return 0
+	return FALSE
 
 /*
 	Adjacency (to anything else):
@@ -78,11 +78,11 @@
 // This is necessary for storage items not on your person.
 /obj/item/Adjacent(var/atom/neighbor, var/recurse = 1)
 	if(neighbor == loc)
-		return 1
+		return TRUE
 	if(isitem(loc))
 		if(recurse > 0)
 			return loc.Adjacent(neighbor,recurse - 1)
-		return 0
+		return FALSE
 	return ..()
 
 /*
@@ -99,7 +99,7 @@
 
 		if( O.flags_1&ON_BORDER_1) // windows are on border, check them first
 			if( O.dir & target_dir || O.dir & (O.dir-1) ) // full tile windows are just diagonals mechanically
-				return 0								  //O.dir&(O.dir-1) is false for any cardinal direction, but true for diagonal ones
+				return FALSE								  //O.dir&(O.dir-1) is false for any cardinal direction, but true for diagonal ones
 		else if( !border_only ) // dense, not on border, cannot pass over
-			return 0
+			return FALSE
-	return 1
+	return TRUE

code/_onclick/hud/alert.dm

@@ -75,9 +75,9 @@
 /mob/proc/clear_alert(category, clear_override = FALSE)
 	var/atom/movable/screen/alert/alert = alerts[category]
 	if(!alert)
-		return 0
+		return FALSE
 	if(alert.override_alerts && !clear_override)
-		return 0
+		return FALSE
 
 	alerts -= category
 	if(client && hud_used)
@@ -784,7 +784,7 @@ so as to remain in compliance with the most up-to-date laws."
 	if(!hud_shown)
 		for(var/i = 1, i <= alerts.len, i++)
 			screenmob.client.screen -= alerts[alerts[i]]
-		return 1
+		return TRUE
 	for(var/i = 1, i <= alerts.len, i++)
 		var/atom/movable/screen/alert/alert = alerts[alerts[i]]
 		if(alert.icon_state == "template")
@@ -807,7 +807,7 @@ so as to remain in compliance with the most up-to-date laws."
 	if(!viewmob)
 		for(var/M in mymob.observers)
 			reorganize_alerts(M)
-	return 1
+	return TRUE
 
 /atom/movable/screen/alert/Click(location, control, params)
 	if(!usr || !usr.client)

code/_onclick/hud/human.dm

@@ -29,7 +29,7 @@
 
 /atom/movable/screen/human/equip/Click()
 	if(ismecha(usr.loc)) // stops inventory actions in a mech
-		return 1
+		return TRUE
 	var/mob/living/carbon/human/H = usr
 	H.quick_equip()
 

code/_onclick/hud/robot.dm

@@ -7,7 +7,7 @@
 
 /atom/movable/screen/robot/Click()
 	if(isobserver(usr))
-		return 1
+		return TRUE
 
 /atom/movable/screen/robot/module/Click()
 	if(..())
@@ -15,7 +15,7 @@
 	var/mob/living/silicon/robot/R = usr
 	if(R.module.type != /obj/item/robot_module)
 		R.hud_used.toggle_show_robot_modules()
-		return 1
+		return TRUE
 	R.pick_module()
 
 /atom/movable/screen/robot/module1

code/_onclick/hud/screen_objects.dm

@@ -62,12 +62,12 @@
 	// At this point in client Click() code we have passed the 1/10 sec check and little else
 	// We don't even know if it's a middle click
 	if(usr.incapacitated())
-		return 1
+		return TRUE
 
 	if(ismob(usr))
 		var/mob/M = usr
 		M.swap_hand()
-	return 1
+	return TRUE
 
 // /atom/movable/screen/skills
 // 	name = "skills"
@@ -455,7 +455,7 @@
 	var/icon_y = text2num(LAZYACCESS(modifiers, "icon-y"))
 	var/choice = get_zone_at(icon_x, icon_y)
 	if (!choice)
-		return 1
+		return TRUE
 
 	return set_selected_zone(choice, usr)
 

code/_onclick/item_attack.dm

@@ -236,7 +236,7 @@
 		attack_message_local = "You [message_verb] yourself[message_hit_area] with [I]"
 	visible_message("<span class='danger'>[attack_message]</span>",\
 		"<span class='userdanger'>[attack_message_local]</span>", null, COMBAT_MESSAGE_RANGE)
-	return 1
+	return TRUE
 
 /// How much stamina this takes to swing this is not for realism purposes hecc off.
 /obj/item/proc/getweight(mob/living/user, multiplier = 1, trait = SKILL_STAMINA_COST)

code/_onclick/other_mobs.dm

@@ -18,7 +18,7 @@
 
 	. = attackchain_flags
 	// Special glove functions:
-	// If the gloves do anything, have them return 1 to stop
+	// If the gloves do anything, have them return TRUE to stop
 	// normal attack_hand() here.
 	var/obj/item/clothing/gloves/G = gloves // not typecast specifically enough in defines
 	if(proximity && istype(G))
@@ -99,7 +99,7 @@
 */
 
 /mob/living/carbon/RestrainedClickOn(atom/A)
-	return 0
+	return FALSE
 
 /mob/living/carbon/human/RangedAttack(atom/A, mouseparams)
 	. = ..()

code/_rendering/atom_huds/data_huds.dm

@@ -24,13 +24,13 @@
 
 /datum/atom_hud/data/human/medical/basic/proc/check_sensors(mob/living/carbon/human/H)
 	if(!istype(H))
-		return 0
+		return FALSE
 	var/obj/item/clothing/under/U = H.w_uniform
 	if(!istype(U))
-		return 0
+		return FALSE
 	if(U.sensor_mode <= SENSOR_VITALS)
-		return 0
+		return FALSE
-	return 1
+	return TRUE
 
 /datum/atom_hud/data/human/medical/basic/add_to_single_hud(mob/M, mob/living/carbon/H)
 	if(check_sensors(H))

code/controllers/hooks.dm

@@ -11,9 +11,9 @@
  * @code
 /hook/foo/proc/bar()
 	if(1)
-		return 1 //Sucessful
+		return TRUE //Sucessful
 	else
-		return 0 //Error, or runtime.
+		return FALSE //Error, or runtime.
  * @endcode
  * All hooks must return nonzero on success, as runtimes will force return null.
  */

code/controllers/master.dm

@@ -129,7 +129,7 @@ GLOBAL_REAL(Master, /datum/controller/master) = new
 /proc/Recreate_MC()
 	. = -1 //so if we runtime, things know we failed
 	if (world.time < Master.restart_timeout)
-		return 0
+		return FALSE
 	if (world.time < Master.restart_clear)
 		Master.restart_count *= 0.5
 
@@ -142,7 +142,7 @@ GLOBAL_REAL(Master, /datum/controller/master) = new
 		new/datum/controller/master()
 	catch
 		return -1
-	return 1
+	return TRUE
 
 
 /datum/controller/master/Recover()

code/controllers/subsystem/activity.dm

@@ -48,7 +48,7 @@ SUBSYSTEM_DEF(activity)
 
 /datum/controller/subsystem/activity/proc/get_average_threat()
 	if(!length(threat_history))
-		return 0
+		return FALSE
 	var/total_weight = 0
 	var/total_amt = 0
 	for(var/i in 1 to threat_history.len-1)

code/controllers/subsystem/job.dm

@@ -47,7 +47,7 @@ SUBSYSTEM_DEF(job)
 	var/list/all_jobs = subtypesof(/datum/job)
 	if(!all_jobs.len)
 		to_chat(world, "<span class='boldannounce'>Error setting up jobs, no job datums found</span>")
-		return 0
+		return FALSE
 
 	for(var/J in all_jobs)
 		var/datum/job/job = new J()
@@ -65,7 +65,7 @@ SUBSYSTEM_DEF(job)
 		name_occupations[job.title] = job
 		type_occupations[J] = job
 
-	return 1
+	return TRUE
 
 
 /datum/controller/subsystem/job/proc/GetJob(rank)
@@ -199,8 +199,8 @@ SUBSYSTEM_DEF(job)
 				continue
 			var/mob/dead/new_player/candidate = pick(candidates)
 			if(AssignRole(candidate, command_position))
-				return 1
+				return TRUE
-	return 0
+	return FALSE
 
 
 //This proc is called at the start of the level loop of DivideOccupations() and will cause head jobs to be checked before any other jobs of the same level
@@ -222,7 +222,7 @@ SUBSYSTEM_DEF(job)
 	var/ai_selected = 0
 	var/datum/job/job = GetJob("AI")
 	if(!job)
-		return 0
+		return FALSE
 	for(var/i = job.total_positions, i > 0, i--)
 		for(var/level in level_order)
 			var/list/candidates = list()
@@ -233,8 +233,8 @@ SUBSYSTEM_DEF(job)
 					ai_selected++
 					break
 	if(ai_selected)
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 
 /** Proc DivideOccupations
@@ -599,8 +599,8 @@ SUBSYSTEM_DEF(job)
 	if(hpc || epc)
 		var/relevent_cap = max(hpc, epc)
 		if((initial_players_to_assign - unassigned.len) >= relevent_cap)
-			return 1
+			return TRUE
-	return 0
+	return FALSE
 
 /datum/controller/subsystem/job/proc/RejectPlayer(mob/dead/new_player/player)
 	if(player.mind && player.mind.special_role)

code/controllers/subsystem/pathfinder.dm

@@ -36,7 +36,7 @@ SUBSYSTEM_DEF(pathfinder)
 		flow[t] = M
 		return free
 	else
-		return 0
+		return FALSE
 
 /datum/flowcache/proc/toolong(l)
 	log_game("Pathfinder route took longer than 150 ticks, src bot [flow[flow[l]]]")

code/controllers/subsystem/radio.dm

@@ -25,7 +25,7 @@ SUBSYSTEM_DEF(radio)
 	if(frequency)
 		frequency.remove_listener(device)
 		// let's don't delete frequencies in case a non-listener keeps a reference
-	return 1
+	return TRUE
 
 /datum/controller/subsystem/radio/proc/return_frequency(new_frequency as num)
 	var/f_text = num2text(new_frequency)

code/controllers/subsystem/research.dm

@@ -358,7 +358,7 @@ SUBSYSTEM_DEF(research)
 /datum/controller/subsystem/research/proc/calculate_server_coefficient()	//Diminishing returns.
 	var/amt = servers.len
 	if(!amt)
-		return 0
+		return FALSE
 	var/coeff = 100
 	coeff = sqrt(coeff / amt)
 	return coeff

code/controllers/subsystem/shuttle.dm

@@ -294,7 +294,7 @@ SUBSYSTEM_DEF(shuttle)
 		log_shuttle("[key_name(user)] has recalled the shuttle.")
 		message_admins("[ADMIN_LOOKUPFLW(user)] has recalled the shuttle.")
 		deadchat_broadcast(" has recalled the shuttle from [span_name("[get_area_name(user, TRUE)]")].", span_name("[user.real_name]"), user, message_type=DEADCHAT_ANNOUNCEMENT)
-		return 1
+		return TRUE
 
 /datum/controller/subsystem/shuttle/proc/canRecall()
 	if(!emergency || emergency.mode != SHUTTLE_CALL || emergencyNoRecall || SSticker.mode.name == "meteor")
@@ -400,7 +400,7 @@ SUBSYSTEM_DEF(shuttle)
 /datum/controller/subsystem/shuttle/proc/toggleShuttle(shuttleId, dockHome, dockAway, timed)
 	var/obj/docking_port/mobile/M = getShuttle(shuttleId)
 	if(!M)
-		return 1
+		return TRUE
 	var/obj/docking_port/stationary/dockedAt = M.get_docked()
 	var/destination = dockHome
 	if(dockedAt && dockedAt.id == dockHome)
@@ -411,7 +411,7 @@ SUBSYSTEM_DEF(shuttle)
 	else
 		if(M.initiate_docking(getDock(destination)) != DOCKING_SUCCESS)
 			return 2
-	return 0 //dock successful
+	return FALSE //dock successful
 
 
 /datum/controller/subsystem/shuttle/proc/moveShuttle(shuttleId, dockId, timed)
@@ -419,14 +419,14 @@ SUBSYSTEM_DEF(shuttle)
 	var/obj/docking_port/stationary/D = getDock(dockId)
 
 	if(!M)
-		return 1
+		return TRUE
 	if(timed)
 		if(M.request(D))
 			return 2
 	else
 		if(M.initiate_docking(D) != DOCKING_SUCCESS)
 			return 2
-	return 0	//dock successful
+	return FALSE	//dock successful
 
 /datum/controller/subsystem/shuttle/proc/request_transit_dock(obj/docking_port/mobile/M)
 	if(!istype(M))

code/controllers/subsystem/ticker.dm

@@ -245,7 +245,7 @@ SUBSYSTEM_DEF(ticker)
 		mode = null
 		SSjob.ResetOccupations()
 		emergency_swap++
-		return 0
+		return FALSE
 
 	CHECK_TICK
 	//Configure mode and assign player to special mode stuff
@@ -264,7 +264,7 @@ SUBSYSTEM_DEF(ticker)
 			to_chat(world, "<B>Error setting up [GLOB.master_mode].</B> Reverting to pre-game lobby.")
 			SSjob.ResetOccupations()
 			emergency_swap++
-			return 0
+			return FALSE
 	else
 		message_admins("<span class='notice'>DEBUG: Bypassing prestart checks...</span>")
 

code/controllers/subsystem/vote.dm

@@ -373,7 +373,7 @@ SUBSYSTEM_DEF(vote)
 /datum/controller/subsystem/vote/proc/submit_vote(vote, score = 0)
 	if(mode)
 		if(CONFIG_GET(flag/no_dead_vote) && usr.stat == DEAD && !usr.client.holder)
-			return 0
+			return FALSE
 		if(vote && ISINRANGE(vote, 1, choices.len))
 			switch(vote_system)
 				if(PLURALITY_VOTING)
@@ -415,7 +415,7 @@ SUBSYSTEM_DEF(vote)
 						voted[usr.ckey] = list()
 					voted[usr.ckey][choices[vote]] = score
 					saved -= usr.ckey
-	return 0
+	return FALSE
 
 /datum/controller/subsystem/vote/proc/initiate_vote(vote_type, initiator_key, display = display_votes, votesystem = PLURALITY_VOTING, forced = FALSE,vote_time = -1)//CIT CHANGE - adds display argument to votes to allow for obfuscated votes
 	vote_system = votesystem
@@ -424,7 +424,7 @@ SUBSYSTEM_DEF(vote)
 			var/next_allowed_time = (started_time + CONFIG_GET(number/vote_delay))
 			if(mode)
 				to_chat(usr, "<span class='warning'>There is already a vote in progress! please wait for it to finish.</span>")
-				return 0
+				return FALSE
 
 			var/admin = FALSE
 			var/ckey = ckey(initiator_key)
@@ -433,7 +433,7 @@ SUBSYSTEM_DEF(vote)
 
 			if(next_allowed_time > world.time && !admin)
 				to_chat(usr, "<span class='warning'>A vote was initiated recently, you must wait [DisplayTimeText(next_allowed_time-world.time)] before a new vote can be started!</span>")
-				return 0
+				return FALSE
 
 		SEND_SOUND(world, sound('sound/misc/notice2.ogg'))
 		reset()
@@ -464,7 +464,7 @@ SUBSYSTEM_DEF(vote)
 			if("custom")
 				question = stripped_input(usr,"What is the vote for?")
 				if(!question)
-					return 0
+					return FALSE
 				var/system_string = input(usr,"Which voting type?",GLOB.vote_type_names[1]) in GLOB.vote_type_names
 				vote_system = GLOB.vote_type_names[system_string]
 				for(var/i=1,i<=10,i++)
@@ -488,7 +488,7 @@ SUBSYSTEM_DEF(vote)
 						toggles ^= choices[chosen]
 				display_votes = toggles
 			else
-				return 0
+				return FALSE
 		mode = vote_type
 		initiator = initiator_key ? initiator_key : "the Server" // austation -- Crew autotransfer vote
 		started_time = world.time
@@ -521,8 +521,8 @@ SUBSYSTEM_DEF(vote)
 				popup.set_window_options("can_close=0")
 				popup.set_content(SSvote.interface(C))
 				popup.open(0)
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 /datum/controller/subsystem/vote/proc/interface(client/C)
 	if(!C)
@@ -736,7 +736,7 @@ SUBSYSTEM_DEF(vote)
 		Remove(owner)
 
 /datum/action/vote/IsAvailable(silent = FALSE)
-	return 1
+	return TRUE
 
 /datum/action/vote/proc/remove_from_client()
 	if(!owner)

code/datums/achievements/_awards.dm

@@ -50,7 +50,7 @@
 	)
 	if(!Q.Execute(async = TRUE))
 		qdel(Q)
-		return 0
+		return FALSE
 	var/result = 0
 	if(Q.NextRow())
 		result = text2num(Q.item[1])

code/datums/action.dm

@@ -151,7 +151,7 @@
 
 /datum/action/ghost/Trigger()
 	if(!..())
-		return 0
+		return FALSE
 	var/mob/M = target
 	M.ghostize(can_reenter_corpse = TRUE, voluntary = TRUE)
 
@@ -389,7 +389,7 @@
 	if(istype(target, /obj/item/hierophant_club))
 		var/obj/item/hierophant_club/H = target
 		if(H.teleporting)
-			return 0
+			return FALSE
 	return ..()
 
 /datum/action/item_action/clock
@@ -399,7 +399,7 @@
 
 /datum/action/item_action/clock/IsAvailable(silent = FALSE)
 	if(!is_servant_of_ratvar(owner))
-		return 0
+		return FALSE
 	return ..()
 
 /datum/action/item_action/clock/toggle_visor
@@ -408,11 +408,11 @@
 
 /datum/action/item_action/clock/toggle_visor/IsAvailable(silent = FALSE)
 	if(!is_servant_of_ratvar(owner))
-		return 0
+		return FALSE
 	if(istype(target, /obj/item/clothing/glasses/judicial_visor))
 		var/obj/item/clothing/glasses/judicial_visor/V = target
 		if(V.recharging)
-			return 0
+			return FALSE
 	return ..()
 
 /datum/action/item_action/clock/hierophant
@@ -486,7 +486,7 @@
 /datum/action/item_action/jetpack_stabilization/IsAvailable(silent = FALSE)
 	var/obj/item/tank/jetpack/J = target
 	if(!istype(J) || !J.on)
-		return 0
+		return FALSE
 	return ..()
 
 /datum/action/item_action/hands_free
@@ -518,7 +518,7 @@
 		else
 			owner.research_scanner--
 		to_chat(owner, "<span class='notice'>[target] research scanner has been [active ? "activated" : "deactivated"].</span>")
-		return 1
+		return TRUE
 
 /datum/action/item_action/toggle_research_scanner/Remove(mob/M)
 	if(owner && active)
@@ -543,7 +543,7 @@
 /datum/action/item_action/organ_action/IsAvailable(silent = FALSE)
 	var/obj/item/organ/I = target
 	if(!I.owner)
-		return 0
+		return FALSE
 	return ..()
 
 /datum/action/item_action/organ_action/toggle/New(Target)
@@ -743,12 +743,12 @@
 
 /datum/action/innate/Trigger()
 	if(!..())
-		return 0
+		return FALSE
 	if(!active)
 		Activate()
 	else
 		Deactivate()
-	return 1
+	return TRUE
 
 /datum/action/innate/proc/Activate()
 	return

code/datums/components/material_container.dm

@@ -328,9 +328,9 @@
 /// For spawning mineral sheets at a specific location. Used by machines to output sheets.
 /datum/component/material_container/proc/retrieve_sheets(sheet_amt, var/datum/material/M, target = null)
 	if(!M.sheet_type)
-		return 0 //Add greyscale sheet handling here later
+		return FALSE //Add greyscale sheet handling here later
 	if(sheet_amt <= 0)
-		return 0
+		return FALSE
 
 	if(!target)
 		target = get_turf(parent)

code/datums/components/mood.dm

@@ -268,7 +268,7 @@
 		else
 			if(the_event.timeout)
 				addtimer(CALLBACK(src, .proc/clear_event, null, category), the_event.timeout, TIMER_UNIQUE|TIMER_OVERRIDE)
-			return 0 //Don't have to update the event.
+			return FALSE //Don't have to update the event.
 	the_event = new type(src, param)//This causes a runtime for some reason, was this me? No - there's an event floating around missing a definition.
 
 	mood_events[category] = the_event
@@ -280,7 +280,7 @@
 /datum/component/mood/proc/clear_event(datum/source, category)
 	var/datum/mood_event/event = mood_events[category]
 	if(!event)
-		return 0
+		return FALSE
 
 	mood_events -= category
 	qdel(event)

code/datums/components/spawner.dm

@@ -43,9 +43,9 @@
 /datum/component/spawner/proc/try_spawn_mob()
 	var/atom/P = parent
 	if(spawned_mobs.len >= max_mobs)
-		return 0
+		return FALSE
 	if(spawn_delay > world.time)
-		return 0
+		return FALSE
 	spawn_delay = world.time + spawn_time
 	var/chosen_mob_type = pick(mob_types)
 	var/mob/living/simple_animal/L = new chosen_mob_type(P.loc)

code/datums/components/storage/storage.dm

@@ -486,7 +486,7 @@
 					var/atom/A = parent
 					A.do_squish()
 
-//This proc return 1 if the item can be picked up and 0 if it can't.
+//This proc return TRUE if the item can be picked up and 0 if it can't.
 //Set the stop_messages to stop it from printing messages
 /datum/component/storage/proc/can_be_inserted(obj/item/I, stop_messages = FALSE, mob/M)
 	if(!istype(I) || (I.item_flags & ABSTRACT))

code/datums/components/summoning.dm

@@ -49,11 +49,11 @@
 
 /datum/component/summoning/proc/do_spawn_mob(atom/spawn_location, summoner)
 	if(spawned_mobs.len >= max_mobs)
-		return 0
+		return FALSE
 	if(last_spawned_time > world.time)
-		return 0
+		return FALSE
 	if(!prob(spawn_chance))
-		return 0
+		return FALSE
 	last_spawned_time = world.time + spawn_delay
 	var/chosen_mob_type = pick(mob_types)
 	var/mob/living/simple_animal/L = new chosen_mob_type(spawn_location)

code/datums/diseases/advance/advance.dm

@@ -135,11 +135,11 @@
 /datum/disease/advance/IsSame(datum/disease/advance/D)
 
 	if(!(istype(D, /datum/disease/advance)))
-		return 0
+		return FALSE
 
 	if(GetDiseaseID() != D.GetDiseaseID())
-		return 0
+		return FALSE
-	return 1
+	return TRUE
 
 // Returns the advance disease with a different reference memory.
 /datum/disease/advance/Copy()
@@ -178,8 +178,8 @@
 /datum/disease/advance/proc/HasSymptom(datum/symptom/S)
 	for(var/datum/symptom/symp in symptoms)
 		if(symp.type == S.type)
-			return 1
+			return TRUE
-	return 0
+	return FALSE
 
 // Will generate new unique symptoms, use this if there are none. Returns a list of symptoms that were generated.
 /datum/disease/advance/proc/GenerateSymptoms(level_min, level_max, amount_get = 0)

code/datums/diseases/advance/symptoms/choking.dm

@@ -64,11 +64,11 @@ Bonus
 
 /datum/symptom/choking/proc/Choke_stage_3_4(mob/living/M, datum/disease/advance/A)
 	M.adjustOxyLoss(rand(6,13))
-	return 1
+	return TRUE
 
 /datum/symptom/choking/proc/Choke(mob/living/M, datum/disease/advance/A)
 	M.adjustOxyLoss(rand(10,18))
-	return 1
+	return TRUE
 
 /*
 //////////////////////////////////////
@@ -136,17 +136,17 @@ Bonus
 /datum/symptom/asphyxiation/proc/Asphyxiate_stage_3_4(mob/living/M, datum/disease/advance/A)
 	var/get_damage = rand(10,15) * power
 	M.adjustOxyLoss(get_damage)
-	return 1
+	return TRUE
 
 /datum/symptom/asphyxiation/proc/Asphyxiate(mob/living/M, datum/disease/advance/A)
 	var/get_damage = rand(15,21) * power
 	M.adjustOxyLoss(get_damage)
 	if(paralysis)
 		M.reagents.add_reagent_list(list(/datum/reagent/toxin/pancuronium = 3, /datum/reagent/toxin/sodium_thiopental = 3))
-	return 1
+	return TRUE
 
 /datum/symptom/asphyxiation/proc/Asphyxiate_death(mob/living/M, datum/disease/advance/A)
 	var/get_damage = rand(25,35) * power
 	M.adjustOxyLoss(get_damage)
 	M.adjustOrganLoss(ORGAN_SLOT_BRAIN, get_damage/2)
-	return 1
+	return TRUE

code/datums/diseases/advance/symptoms/fever.dm

@@ -58,4 +58,4 @@ Bonus
 		M.adjust_bodytemperature(get_heat * A.stage, 0, BODYTEMP_HEAT_DAMAGE_LIMIT - 1)
 	else
 		M.adjust_bodytemperature(get_heat * A.stage)
-	return 1
+	return TRUE

code/datums/diseases/advance/symptoms/fire.dm

@@ -71,14 +71,14 @@ Bonus
 	M.adjustFireLoss(3 * power)
 	if(infective)
 		A.spread(2)
-	return 1
+	return TRUE
 
 /datum/symptom/fire/proc/Firestacks_stage_5(mob/living/M, datum/disease/advance/A)
 	M.adjust_fire_stacks(3 * power)
 	M.adjustFireLoss(5 * power)
 	if(infective)
 		A.spread(4)
-	return 1
+	return TRUE
 
 /*
 //////////////////////////////////////
@@ -157,7 +157,7 @@ Bonus
 	M.adjustFireLoss(get_stacks/2)
 	if(chems)
 		M.reagents.add_reagent(/datum/reagent/clf3, 2 * power)
-	return 1
+	return TRUE
 
 /datum/symptom/alkali/proc/Alkali_fire_stage_5(mob/living/M, datum/disease/advance/A)
 	var/get_stacks = 8 * power
@@ -165,4 +165,4 @@ Bonus
 	M.adjustFireLoss(get_stacks)
 	if(chems)
 		M.reagents.add_reagent_list(list(/datum/reagent/napalm = 4 * power, /datum/reagent/clf3 = 4 * power))
-	return 1
+	return TRUE

code/datums/diseases/advance/symptoms/flesh_eating.dm

@@ -65,7 +65,7 @@ Bonus
 			var/mob/living/carbon/human/H = M
 			var/obj/item/bodypart/random_part = pick(H.bodyparts)
 			random_part.generic_bleedstacks += 5 * power
-	return 1
+	return TRUE
 
 /*
 //////////////////////////////////////
@@ -133,4 +133,4 @@ Bonus
 		M.reagents.add_reagent_list(list(/datum/reagent/toxin/heparin = 2, /datum/reagent/toxin/lipolicide = 2))
 	if(zombie)
 		M.reagents.add_reagent(/datum/reagent/romerol, 1)
-	return 1
+	return TRUE

code/datums/diseases/advance/symptoms/heal.dm

@@ -92,7 +92,7 @@
 	for(var/obj/item/bodypart/L in parts)
 		if(L.heal_damage(heal_amt/parts.len, heal_amt/parts.len))
 			M.update_damage_overlays()
-	return 1
+	return TRUE
 
 /datum/symptom/heal/starlight/passive_message_condition(mob/living/M)
 	if(M.getBruteLoss() || M.getFireLoss() || M.getToxLoss())
@@ -129,7 +129,7 @@
 			M.adjust_nutrition(0.3)
 		if(prob(2))
 			to_chat(M, "<span class='notice'>You feel a mild warmth as your blood purifies itself.</span>")
-	return 1
+	return TRUE
 
 
 
@@ -167,7 +167,7 @@
 	C.adjust_nutrition(-lost_nutrition * HUNGER_FACTOR) //Hunger depletes at 10x the normal speed
 	if(prob(2))
 		to_chat(C, "<span class='notice'>You feel an odd gurgle in your stomach, as if it was working much faster than normal.</span>")
-	return 1
+	return TRUE
 
 /datum/symptom/heal/darkness
 	name = "Nocturnal Regeneration"
@@ -210,7 +210,7 @@
 	for(var/obj/item/bodypart/L in parts)
 		if(L.heal_damage(heal_amt/parts.len, heal_amt/parts.len * 0.5)) //more effective on brute
 			M.update_damage_overlays()
-	return 1
+	return TRUE
 
 /datum/symptom/heal/darkness/passive_message_condition(mob/living/M)
 	if(M.getBruteLoss() || M.getFireLoss())
@@ -307,7 +307,7 @@
 	if(active_coma && M.getBruteLoss() + M.getFireLoss() == 0)
 		uncoma(M)
 
-	return 1
+	return TRUE
 
 /datum/symptom/heal/coma/passive_message_condition(mob/living/M)
 	if((M.getBruteLoss() + M.getFireLoss()) > 30)
@@ -365,7 +365,7 @@
 		if(L.heal_damage(heal_amt/parts.len * 0.5, heal_amt/parts.len))
 			M.update_damage_overlays()
 
-	return 1
+	return TRUE
 
 /datum/symptom/heal/water/passive_message_condition(mob/living/M)
 	if(M.getBruteLoss() || M.getFireLoss())
@@ -435,7 +435,7 @@
 	for(var/obj/item/bodypart/L in parts)
 		if(L.heal_damage(heal_amt/parts.len, heal_amt/parts.len))
 			M.update_damage_overlays()
-	return 1
+	return TRUE
 
 
 /datum/symptom/heal/radiation
@@ -475,7 +475,7 @@
 		if(RAD_BURN_THRESHOLD to RAD_MOB_MUTATE)
 			return 0.75
 		if(RAD_MOB_MUTATE to RAD_MOB_KNOCKDOWN)
-			return 1
+			return TRUE
 		else
 			return 1.5
 
@@ -498,4 +498,4 @@
 	for(var/obj/item/bodypart/L in parts)
 		if(L.heal_damage(heal_amt/parts.len, heal_amt/parts.len))
 			M.update_damage_overlays()
-	return 1
+	return TRUE

code/datums/diseases/advance/symptoms/shivering.dm

@@ -58,4 +58,4 @@ Bonus
 	if(unsafe)
 		limit = 0
 	M.adjust_bodytemperature(-get_cold * A.stage, limit)
-	return 1
+	return TRUE

code/datums/dna.dm

@@ -538,7 +538,7 @@
 
 /datum/dna/proc/check_block_string(mutation)
 	if((LAZYLEN(mutation_index) > DNA_MUTATION_BLOCKS) || !(mutation in mutation_index))
-		return 0
+		return FALSE
 	return is_gene_active(mutation)
 
 /datum/dna/proc/is_gene_active(mutation)
@@ -585,7 +585,7 @@
 
 /proc/setblock(istring, blocknumber, replacement, blocksize=DNA_BLOCK_SIZE)
 	if(!istring || !blocknumber || !replacement || !blocksize)
-		return 0
+		return FALSE
 	return getleftblocks(istring, blocknumber, blocksize) + replacement + getrightblocks(istring, blocknumber, blocksize)
 
 /datum/dna/proc/mutation_in_sequence(mutation)
@@ -649,7 +649,7 @@
 
 /proc/scramble_dna(mob/living/carbon/M, ui=FALSE, se=FALSE, probability)
 	if(!M.has_dna())
-		return 0
+		return FALSE
 	if(se)
 		for(var/i=1, i<=DNA_MUTATION_BLOCKS, i++)
 			if(prob(probability))
@@ -660,7 +660,7 @@
 			if(prob(probability))
 				M.dna.uni_identity = setblock(M.dna.uni_identity, i, random_string(DNA_BLOCK_SIZE, GLOB.hex_characters))
 		M.updateappearance(mutations_overlay_update=1)
-	return 1
+	return TRUE
 
 //value in range 1 to values. values must be greater than 0
 //all arguments assumed to be positive integers

code/datums/explosion.dm

@@ -397,7 +397,7 @@ GLOBAL_LIST_EMPTY(explosions)
 	var/choice = input("Bomb Size?") in choices
 	switch(choice)
 		if(null)
-			return 0
+			return FALSE
 		if("Small Bomb")
 			dev = 1
 			heavy = 2

code/datums/martial/boxing.dm

@@ -6,11 +6,11 @@
 
 /datum/martial_art/boxing/disarm_act(mob/living/carbon/human/A, mob/living/carbon/human/D)
 	to_chat(A, "<span class='warning'>Can't disarm while boxing!</span>")
-	return 1
+	return TRUE
 
 /datum/martial_art/boxing/grab_act(mob/living/carbon/human/A, mob/living/carbon/human/D)
 	to_chat(A, "<span class='warning'>Can't grab while boxing!</span>")
-	return 1
+	return TRUE
 
 /datum/martial_art/boxing/harm_act(mob/living/carbon/human/A, mob/living/carbon/human/D)
 
@@ -46,7 +46,7 @@
 			log_combat(A, D, "knocked out (boxing) ")
 		else if(D.lying)
 			D.forcesay(GLOB.hit_appends)
-	return 1
+	return TRUE
 
 /datum/martial_art/boxing/teach(mob/living/carbon/human/H, make_temporary = TRUE)
 	. = ..()

code/datums/mutations/_mutations.dm

@@ -119,8 +119,8 @@
 			owner.RemoveSpell(power)
 			qdel(power)
 		SEND_SIGNAL(owner, COMSIG_HUMAN_MUTATION_LOSS, src)
-		return 0
+		return FALSE
-	return 1
+	return TRUE
 
 /datum/mutation/human/proc/say_mod(message)
 	if(message)

code/datums/recipe.dm

@@ -48,7 +48,7 @@
 			if (aval_r_amnt>reagents_list[r_r])
 				. = -1
 			else
-				return 0
+				return FALSE
 	if ((reagents_list?(reagents_list.len):(0)) < avail_reagents.reagent_list.len)
 		return -1
 	return .
@@ -58,7 +58,7 @@
 		if (locate(/obj/) in container)
 			return -1
 		else
-			return 1
+			return TRUE
 	. = 1
 	var/list/checklist = items.Copy()
 	for (var/obj/O in container)
@@ -71,7 +71,7 @@
 		if (!found)
 			. = -1
 	if (checklist.len)
-		return 0
+		return FALSE
 	return .
 
 //general version

code/datums/status_effects/status_effect.dm

@@ -95,7 +95,7 @@
   * Multiplied to clickdelays
   */
 /datum/status_effect/proc/action_cooldown_mod()
-	return 1
+	return TRUE
 
 ////////////////
 // ALERT HOOK //

code/datums/weather/weather.dm

@@ -178,7 +178,7 @@
   */
 /datum/weather/proc/end()
 	if(stage == END_STAGE)
-		return 1
+		return TRUE
 	stage = END_STAGE
 	STOP_PROCESSING(SSweather, src)
 	update_areas()

code/game/area/areas.dm

@@ -560,9 +560,9 @@ GLOBAL_LIST_EMPTY(teleportlocs)
 /area/proc/powered(chan)		// return true if the area has power to given channel
 
 	if(!requires_power)
-		return 1
+		return TRUE
 	if(always_unpowered)
-		return 0
+		return FALSE
 	switch(chan)
 		if(EQUIP)
 			return power_equip
@@ -571,10 +571,10 @@ GLOBAL_LIST_EMPTY(teleportlocs)
 		if(ENVIRON)
 			return power_environ
 
-	return 0
+	return FALSE
 
 /area/space/powered(chan) //Nope.avi
-	return 0
+	return FALSE
 
 // called when power status changes
 

code/game/area/areas/holodeck.dm

@@ -26,18 +26,18 @@
 
 /area/holodeck/powered(var/chan)
 	if(!requires_power)
-		return 1
+		return TRUE
 	if(always_unpowered)
-		return 0
+		return FALSE
 	if(!linked)
-		return 0
+		return FALSE
 	var/area/A = get_area(linked)
 	ASSERT(!istype(A, /area/holodeck))
 	return A.powered(chan)
 
 /area/holodeck/usage(var/chan)
 	if(!linked)
-		return 0
+		return FALSE
 	var/area/A = get_area(linked)
 	ASSERT(!istype(A, /area/holodeck))
 	return A.usage(chan)
@@ -51,7 +51,7 @@
 
 /area/holodeck/use_power(var/amount, var/chan)
 	if(!linked)
-		return 0
+		return FALSE
 	var/area/A = get_area(linked)
 	ASSERT(!istype(A, /area/holodeck))
 	return A.use_power(amount,chan)

code/game/atoms.dm

@@ -667,7 +667,7 @@
 	if((explosion_flags & EXPLOSION_FLAG_DENSITY_DEPENDENT) && !density)
 		return power	// no block
 	else if((explosion_flags & EXPLOSION_FLAG_HARD_OBSTACLE) && !QDELETED(src))
-		return 0		// fully blocked
+		return FALSE		// fully blocked
 
 /**
   * Called when a wave explosion hits this atom.
@@ -1411,7 +1411,7 @@
 		T = get_turf(src)
 
 	if(!T)
-		return 0
+		return FALSE
 
 	var/list/forced_gravity = list()
 	SEND_SIGNAL(src, COMSIG_ATOM_HAS_GRAVITY, T, forced_gravity)
@@ -1424,7 +1424,7 @@
 		return max_grav
 
 	if(isspaceturf(T)) // Turf never has gravity
-		return 0
+		return FALSE
 
 	var/area/A = get_area(T)
 	if(A.has_gravity) // Areas which always has gravity

code/game/atoms_movement.dm

@@ -291,9 +291,9 @@
  * Called whenever an object moves and by mobs when they attempt to move themselves through space
  * And when an object or action applies a force on src, see [newtonian_move][/atom/movable/proc/newtonian_move]
  *
- * Return 0 to have src start/keep drifting in a no-grav area and 1 to stop/not start drifting
+ * return FALSE to have src start/keep drifting in a no-grav area and 1 to stop/not start drifting
  *
- * Mobs should return 1 if they should be able to move of their own volition, see [/client/proc/Move]
+ * Mobs should return TRUE if they should be able to move of their own volition, see [/client/proc/Move]
  *
  * Arguments:
  * * movement_dir - 0 when stopping or any dir when trying to move

code/game/communications.dm

@@ -150,7 +150,7 @@ GLOBAL_LIST_INIT(reverseradiochannels, list(
 	if(range)
 		start_point = get_turf(source)
 		if(!start_point)
-			return 0
+			return FALSE
 
 	//Send the data
 	for(var/current_filter in filter_list)

code/game/gamemodes/bloodsucker/bloodsucker.dm

@@ -199,7 +199,7 @@
 				// Check Overdose: Am I even addicted to blood? Do I even have any in me?
 				//if (!target.reagents.addiction_list || !target.reagents.reagent_list)
 					//message_admins("DEBUG2: can_make_vassal() Abort: No reagents")
-				//	return 0
+				//	return FALSE
 				// Check Overdose: Did my current volume go over the Overdose threshold?
 				//var/am_addicted = 0
 				//for (var/datum/reagent/blood/vampblood/blood in target.reagents.addiction_list) // overdosed is tracked in reagent_list, not addiction_list.
@@ -210,7 +210,7 @@
 
 				//if (!am_addicted)
 					//message_admins("DEBUG4: can_make_vassal() Abort: No Blood")
-				//	return 0
+				//	return FALSE
 	// No Mind!
 	if(!target.mind || !target.mind.key)
 		if(display_warning)

code/game/gamemodes/changeling/changeling.dm

@@ -51,10 +51,10 @@ GLOBAL_VAR(changeling_team_objective_type) //If this is not null, we hand our th
 			changelings += changeling
 			changeling.special_role = ROLE_CHANGELING
 			changeling.restricted_roles = restricted_jobs
-		return 1
+		return TRUE
 	else
 		setup_error = "Not enough changeling candidates"
-		return 0
+		return FALSE
 
 /datum/game_mode/changeling/post_setup()
 	for(var/datum/mind/changeling in changelings)

code/game/gamemodes/changeling/traitor_chan.dm

@@ -20,11 +20,11 @@
 
 /datum/game_mode/traitor/changeling/can_start()
 	if(!..())
-		return 0
+		return FALSE
 	possible_changelings = get_players_for_role(ROLE_CHANGELING)
 	if(possible_changelings.len < required_enemies)
-		return 0
+		return FALSE
-	return 1
+	return TRUE
 
 /datum/game_mode/traitor/changeling/pre_setup()
 	if(CONFIG_GET(flag/protect_roles_from_antagonist))
@@ -55,7 +55,7 @@
 			changeling.restricted_roles = restricted_jobs
 		return ..()
 	else
-		return 0
+		return FALSE
 
 /datum/game_mode/traitor/changeling/post_setup()
 	for(var/datum/mind/changeling in changelings)

code/game/gamemodes/clock_cult/clock_cult.dm

@@ -188,16 +188,16 @@ Credit where due:
 		equip_servant(L)
 		add_servant_of_ratvar(L, TRUE)
 	..()
-	return 1
+	return TRUE
 
 /datum/game_mode/proc/greet_servant(mob/M) //Description of their role
 	if(!M)
-		return 0
+		return FALSE
 	to_chat(M, "<span class='bold large_brass'>You are a servant of Ratvar, the Clockwork Justiciar!</span>")
 	to_chat(M, "<span class='brass'>Unlock <b>Script</b> scripture by converting a new servant or when 35kw of power is reached.</span>")
 	to_chat(M, "<span class='brass'><b>Application</b> scripture will be unlocked when 50kw of power is reached.</span>")
 	M.playsound_local(get_turf(M), 'sound/ambience/antag/clockcultalr.ogg', 100, FALSE, pressure_affected = FALSE)
-	return 1
+	return TRUE
 
 /datum/game_mode/proc/equip_servant(mob/living/M) //Grants a clockwork slab to the mob
 	if(!M || !ishuman(M))

code/game/gamemodes/cult/cult.dm

@@ -154,9 +154,9 @@
 			if(cult_mind.current.onCentCom() || cult_mind.current.onSyndieBase())
 				acolytes_survived++
 	if(acolytes_survived>=acolytes_needed)
-		return 0
+		return FALSE
 	else
-		return 1
+		return TRUE
 
 
 /datum/game_mode/cult/generate_report()

code/game/gamemodes/devil/devil agent/devil_agent.dm

@@ -41,8 +41,8 @@
 		outsellobjective.target = target_mind
 		outsellobjective.update_explanation_text()
 		D.objectives += outsellobjective
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 /datum/game_mode/devil/devil_agents/generate_report()
 	return "Multiple soul merchants have been spotted in the quadrant, and appear to be competing over who can purchase the most souls.  Be advised that they are likely to manufacture \

code/game/gamemodes/devil/devil_game_mode.dm

@@ -47,15 +47,15 @@
 
 	if(devils.len < required_enemies)
 		setup_error = "Not enough devil candidates"
-		return 0
+		return FALSE
-	return 1
+	return TRUE
 
 
 /datum/game_mode/devil/post_setup()
 	for(var/datum/mind/devil in devils)
 		post_setup_finalize(devil)
 	..()
-	return 1
+	return TRUE
 
 /datum/game_mode/devil/generate_report()
 	return "Infernal creatures have been seen nearby offering great boons in exchange for souls.  This is considered theft against Nanotrasen, as all employment contracts contain a lien on the \

code/game/gamemodes/dynamic/dynamic.dm

@@ -546,7 +546,7 @@ GLOBAL_VAR_INIT(dynamic_forced_threat_level, -1)
 		return ruleset.cost + added_threat
 	else
 		stack_trace("The starting rule \"[ruleset.name]\" failed to pre_execute.")
-	return 0
+	return FALSE
 
 /// Mainly here to facilitate delayed rulesets. All roundstart rulesets are executed with a timered callback to this proc.
 /datum/game_mode/dynamic/proc/execute_roundstart_rule(sent_rule)

code/game/gamemodes/dynamic/dynamic_rulesets.dm

@@ -115,7 +115,7 @@
 /// Returns how much threat to actually spend in the end.
 /datum/dynamic_ruleset/proc/scale_up(population, max_scale)
 	if (!scaling_cost)
-		return 0
+		return FALSE
 
 	var/antag_fraction = 0
 	for(var/_ruleset in (mode.executed_rules + list(src))) // we care about the antags we *will* assign, too

code/game/gamemodes/extended/extended.dm

@@ -9,7 +9,7 @@
 	announce_text = "Just have fun and enjoy the game!"
 
 /datum/game_mode/extended/pre_setup()
-	return 1
+	return TRUE
 
 /datum/game_mode/extended/generate_report()
 	return "The transmission mostly failed to mention your sector. It is possible that there is nothing in the Syndicate that could threaten your station during this shift."

code/game/gamemodes/game_mode.dm

@@ -68,22 +68,22 @@
 			playerC++
 	if(!GLOB.Debug2)
 		if(playerC < required_players || (maximum_players >= 0 && playerC > maximum_players))
-			return 0
+			return FALSE
 	antag_candidates = get_players_for_role(antag_flag)
 	if(!GLOB.Debug2)
 		if(antag_candidates.len < required_enemies)
-			return 0
+			return FALSE
-		return 1
+		return TRUE
 	else
 		message_admins("<span class='notice'>DEBUG: GAME STARTING WITHOUT PLAYER NUMBER CHECKS, THIS WILL PROBABLY BREAK SHIT.</span>")
-		return 1
+		return TRUE
 
 
 
 
 ///Attempts to select players for special roles the mode might have.
 /datum/game_mode/proc/pre_setup()
-	return 1
+	return TRUE
 
 ///Everyone should now be on the station and have their normal gear.  This is the place to give the special roles extra things
 /datum/game_mode/proc/post_setup(report) //Gamemodes can override the intercept report. Passing TRUE as the argument will force a report.
@@ -162,10 +162,10 @@
 
 	switch(SSshuttle.emergency.mode) //Rounds on the verge of ending don't get new antags, they just run out
 		if(SHUTTLE_STRANDED, SHUTTLE_ESCAPE)
-			return 1
+			return TRUE
 		if(SHUTTLE_CALL)
 			if(SSshuttle.emergency.timeLeft(1) < initial(SSshuttle.emergencyCallTime)*0.5)
-				return 1
+				return TRUE
 
 	var/matc = CONFIG_GET(number/midround_antag_time_check)
 	if(world.time >= (matc * 600))
@@ -202,7 +202,7 @@
 	 //somewhere between 1 and 3 minutes from now
 	if(!CONFIG_GET(keyed_list/midround_antag)[SSticker.mode.config_tag])
 		round_converted = 0
-		return 1
+		return TRUE
 	for(var/mob/living/carbon/human/H in antag_candidates)
 		if(H.client)
 			replacementmode.make_antag_chance(H)
@@ -213,7 +213,7 @@
 
 ///Called by the gameSSticker
 /datum/game_mode/process()
-	return 0
+	return FALSE
 
 //For things that do not die easily
 /datum/game_mode/proc/are_special_antags_dead()
@@ -237,44 +237,44 @@
 				if(Player.mind)
 					if(Player.mind.special_role || LAZYLEN(Player.mind.antag_datums))
 						continuous_sanity_checked = 1
-						return 0
+						return FALSE
 			if(!continuous_sanity_checked)
 				message_admins("The roundtype ([config_tag]) has no antagonists, continuous round has been defaulted to on and midround_antag has been defaulted to off.")
 				continuous[config_tag] = TRUE
 				midround_antag[config_tag] = FALSE
 				SSshuttle.clearHostileEnvironment(src)
-				return 0
+				return FALSE
 
 
 		if(living_antag_player && living_antag_player.mind && isliving(living_antag_player) && living_antag_player.stat != DEAD && !isnewplayer(living_antag_player) &&!isbrain(living_antag_player) && (living_antag_player.mind.special_role || LAZYLEN(living_antag_player.mind.antag_datums)))
-			return 0 //A resource saver: once we find someone who has to die for all antags to be dead, we can just keep checking them, cycling over everyone only when we lose our mark.
+			return FALSE //A resource saver: once we find someone who has to die for all antags to be dead, we can just keep checking them, cycling over everyone only when we lose our mark.
 
 		for(var/mob/Player in GLOB.alive_mob_list)
 			if(Player.mind && Player.stat != DEAD && !isnewplayer(Player) &&!isbrain(Player) && Player.client)
 				if(Player.mind.special_role || LAZYLEN(Player.mind.antag_datums)) //Someone's still antaging!
 					living_antag_player = Player
-					return 0
+					return FALSE
 
 		if(!are_special_antags_dead())
 			return FALSE
 
 		if(!continuous[config_tag] || force_ending)
-			return 1
+			return TRUE
 
 		else
 			round_converted = convert_roundtype()
 			if(!round_converted)
 				if(round_ends_with_antag_death)
-					return 1
+					return TRUE
 				else
 					midround_antag[config_tag] = 0
-					return 0
+					return FALSE
 
-	return 0
+	return FALSE
 
 
 /datum/game_mode/proc/check_win() //universal trigger to be called at mob death, nuke explosion, etc. To be called from everywhere.
-	return 0
+	return FALSE
 
 /datum/game_mode/proc/send_intercept()
 	if(flipseclevel && !(config_tag == "extended"))//CIT CHANGE - lets the security level be flipped roundstart
@@ -533,21 +533,21 @@
 //If the configuration option is set to require players to be logged as old enough to play certain jobs, then this proc checks that they are, otherwise it just returns 1
 /datum/game_mode/proc/age_check(client/C)
 	if(get_remaining_days(C) == 0)
-		return 1	//Available in 0 days = available right now = player is old enough to play.
+		return TRUE	//Available in 0 days = available right now = player is old enough to play.
-	return 0
+	return FALSE
 
 
 /datum/game_mode/proc/get_remaining_days(client/C)
 	if(!C)
-		return 0
+		return FALSE
 	if(C.prefs?.db_flags & DB_FLAG_EXEMPT)
-		return 0
+		return FALSE
 	if(!CONFIG_GET(flag/use_age_restriction_for_jobs))
-		return 0
+		return FALSE
 	if(!isnum(C.player_age))
-		return 0 //This is only a number if the db connection is established, otherwise it is text: "Requires database", meaning these restrictions cannot be enforced
+		return FALSE //This is only a number if the db connection is established, otherwise it is text: "Requires database", meaning these restrictions cannot be enforced
 	if(!isnum(enemy_minimum_age))
-		return 0
+		return FALSE
 
 	return max(0, enemy_minimum_age - C.player_age)
 

code/game/gamemodes/objective.dm

@@ -639,11 +639,11 @@ GLOBAL_LIST_EMPTY(possible_items)
 			if(istype(I, steal_target))
 				if(!targetinfo) //If there's no targetinfo, then that means it was a custom objective. At this point, we know you have the item, so return 1.
 					return TRUE
-				else if(targetinfo.check_special_completion(I))//Returns 1 by default. Items with special checks will return 1 if the conditions are fulfilled.
+				else if(targetinfo.check_special_completion(I))//Returns 1 by default. Items with special checks will return TRUE if the conditions are fulfilled.
 					return TRUE
 
 			if(targetinfo && (I.type in targetinfo.altitems)) //Ok, so you don't have the item. Do you have an alternative, at least?
-				if(targetinfo.check_special_completion(I))//Yeah, we do! Don't return 0 if we don't though - then you could fail if you had 1 item that didn't pass and got checked first!
+				if(targetinfo.check_special_completion(I))//Yeah, we do! Don't return FALSE if we don't though - then you could fail if you had 1 item that didn't pass and got checked first!
 					return TRUE
 	return FALSE
 

code/game/gamemodes/objective_items.dm

@@ -9,7 +9,7 @@
 	var/list/special_equipment = list()
 
 /datum/objective_item/proc/check_special_completion() //for objectives with special checks (is that slime extract unused? does that intellicard have an ai in it? etcetc)
-	return 1
+	return TRUE
 
 /datum/objective_item/proc/TargetExists()
 	return TRUE
@@ -142,8 +142,8 @@
 /datum/objective_item/steal/functionalai/check_special_completion(obj/item/aicard/C)
 	for(var/mob/living/silicon/ai/A in C)
 		if(isAI(A) && A.stat != DEAD) //See if any AI's are alive inside that card.
-			return 1
+			return TRUE
-	return 0
+	return FALSE
 
 /datum/objective_item/steal/blueprints
 	name = "the station blueprints."
@@ -169,8 +169,8 @@
 
 /datum/objective_item/steal/slime/check_special_completion(obj/item/slime_extract/E)
 	if(E.Uses > 0)
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 //Unique Objectives
 /datum/objective_item/unique/docs_red

code/game/gamemodes/objective_sabotage.dm

@@ -23,7 +23,7 @@
 	START_PROCESSING(SSprocessing, src)
 
 /datum/sabotage_objective/processing/proc/check_condition_processing()
-	return 1
+	return TRUE
 
 /datum/sabotage_objective/processing/process()
 	check_condition_processing()

code/game/gamemodes/overthrow/objective.dm

@@ -34,7 +34,7 @@
 	return get_points() ? TRUE : FALSE
 
 /datum/objective/overthrow/proc/get_points()
-	return 0 // int, not bool
+	return FALSE // int, not bool
 
 /datum/objective/overthrow/proc/result_points(datum/mind/the_dude, base_points) // App
 	var/initial_points = base_points

code/game/gamemodes/sandbox/sandbox.dm

@@ -11,7 +11,7 @@
 /datum/game_mode/sandbox/pre_setup()
 	for(var/mob/M in GLOB.player_list)
 		M.CanBuild()
-	return 1
+	return TRUE
 
 /datum/game_mode/sandbox/post_setup()
 	..()

code/game/machinery/_machinery.dm

@@ -509,8 +509,8 @@ Class Procs:
 		I.play_tool_sound(src, 50)
 		setDir(turn(dir,-90))
 		to_chat(user, "<span class='notice'>You rotate [src].</span>")
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 /obj/proc/can_be_unfasten_wrench(mob/user, silent) //if we can unwrench this object; returns SUCCESSFUL_UNFASTEN and FAILED_UNFASTEN, which are both TRUE, or CANT_UNFASTEN, which isn't.
 	if(!(isfloorturf(loc) || istype(loc, /turf/open/indestructible)) && !anchored)

code/game/machinery/camera/camera.dm

@@ -274,7 +274,7 @@
 
 /obj/machinery/camera/run_obj_armor(damage_amount, damage_type, damage_flag = 0, attack_dir)
 	if(damage_flag == MELEE && damage_amount < 12 && !(stat & BROKEN))
-		return 0
+		return FALSE
 	. = ..()
 
 /obj/machinery/camera/obj_break(damage_flag)
@@ -417,4 +417,4 @@
 	else
 		user.sight = 0
 		user.see_in_dark = 2
-	return 1
+	return TRUE

code/game/machinery/computer/camera_advanced.dm

@@ -179,7 +179,7 @@
 	user.see_invisible = SEE_INVISIBLE_LIVING //can't see ghosts through cameras
 	user.sight = SEE_TURFS | SEE_BLACKNESS
 	user.see_in_dark = 2
-	return 1
+	return TRUE
 
 /mob/camera/aiEye/remote/Destroy()
 	if(origin && eye_user)

code/game/machinery/computer/card.dm

@@ -505,10 +505,10 @@ GLOBAL_VAR_INIT(time_last_changed_position, 0)
 				var/datum/job/j = SSjob.GetJob(edit_job_target)
 				if(!j)
 					updateUsrDialog()
-					return 0
+					return FALSE
 				if(can_open_job(j) != 1)
 					updateUsrDialog()
-					return 0
+					return FALSE
 				if(opened_positions[edit_job_target] >= 0)
 					GLOB.time_last_changed_position = world.time / 10
 				j.total_positions++
@@ -522,10 +522,10 @@ GLOBAL_VAR_INIT(time_last_changed_position, 0)
 				var/datum/job/j = SSjob.GetJob(edit_job_target)
 				if(!j)
 					updateUsrDialog()
-					return 0
+					return FALSE
 				if(can_close_job(j) != 1)
 					updateUsrDialog()
-					return 0
+					return FALSE
 				//Allow instant closing without cooldown if a position has been opened before
 				if(opened_positions[edit_job_target] <= 0)
 					GLOB.time_last_changed_position = world.time / 10
@@ -540,7 +540,7 @@ GLOBAL_VAR_INIT(time_last_changed_position, 0)
 				var/datum/job/j = SSjob.GetJob(priority_target)
 				if(!j)
 					updateUsrDialog()
-					return 0
+					return FALSE
 				var/priority = TRUE
 				if(j in SSjob.prioritized_jobs)
 					SSjob.prioritized_jobs -= j

code/game/machinery/computer/law.dm

@@ -27,8 +27,8 @@
 
 /obj/machinery/computer/upload/proc/can_upload_to(mob/living/silicon/S)
 	if(S.stat == DEAD)
-		return 0
+		return FALSE
-	return 1
+	return TRUE
 
 /obj/machinery/computer/upload/ai
 	name = "\improper AI upload console"
@@ -45,9 +45,9 @@
 
 /obj/machinery/computer/upload/ai/can_upload_to(mob/living/silicon/ai/A)
 	if(!A || !isAI(A))
-		return 0
+		return FALSE
 	if(A.control_disabled)
-		return 0
+		return FALSE
 	return ..()
 
 
@@ -66,7 +66,7 @@
 
 /obj/machinery/computer/upload/borg/can_upload_to(mob/living/silicon/robot/B)
 	if(!B || !iscyborg(B))
-		return 0
+		return FALSE
 	if(B.scrambledcodes || B.emagged)
-		return 0
+		return FALSE
 	return ..()

code/game/machinery/computer/medical.dm

@@ -571,8 +571,8 @@
 				if(user.canUseTopic(src, !hasSiliconAccessInArea(user)))
 					if(!record1 || record1 == active1)
 						if(!record2 || record2 == active2)
-							return 1
+							return TRUE
-	return 0
+	return FALSE
 
 /obj/machinery/computer/med_data/laptop
 	name = "medical laptop"

code/game/machinery/computer/security.dm

@@ -805,9 +805,9 @@ What a mess.*/
 		if(authenticated)
 			if(user.canUseTopic(src, !hasSiliconAccessInArea(user)))
 				if(!trim(message1))
-					return 0
+					return FALSE
 				if(!record1 || record1 == active1)
 					if(!record2 || record2 == active2)
-						return 1
+						return TRUE
-	return 0
+	return FALSE
 

code/game/machinery/doors/airlock_types.dm

@@ -255,7 +255,7 @@
 	qdel(src)
 
 /obj/machinery/door/airlock/plasma/BlockThermalConductivity() //we don't stop the heat~
-	return 0
+	return FALSE
 
 /obj/machinery/door/airlock/plasma/attackby(obj/item/C, mob/user, params)
 	if(C.get_temperature() > 300)//If the temperature of the object is over 300, then ignite
@@ -507,11 +507,11 @@
 
 /obj/machinery/door/airlock/cult/allowed(mob/living/L)
 	if(!density)
-		return 1
+		return TRUE
 	if(friendly || iscultist(L) || isshade(L) || isconstruct(L))
 		if(!stealthy)
 			new openingoverlaytype(loc)
-		return 1
+		return TRUE
 	else
 		if(!stealthy)
 			new /obj/effect/temp_visual/cult/sac(loc)
@@ -521,7 +521,7 @@
 			flash_color(L, flash_color="#960000", flash_time=20)
 			L.DefaultCombatKnockdown(40)
 			L.throw_at(throwtarget, 5, 1)
-		return 0
+		return FALSE
 
 /obj/machinery/door/airlock/cult/proc/conceal()
 	icon = 'icons/obj/doors/airlocks/station/maintenance.dmi'
@@ -619,7 +619,7 @@
 	return (is_servant_of_ratvar(user) && !isAllPowerCut())
 
 /obj/machinery/door/airlock/clockwork/ratvar_act()
-	return 0
+	return FALSE
 
 /obj/machinery/door/airlock/clockwork/narsie_act()
 	..()
@@ -635,8 +635,8 @@
 
 /obj/machinery/door/airlock/clockwork/allowed(mob/M)
 	if(is_servant_of_ratvar(M))
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 /obj/machinery/door/airlock/clockwork/hasPower()
 	return TRUE //yes we do have power
@@ -657,36 +657,36 @@
 
 /obj/machinery/door/airlock/clockwork/proc/attempt_construction(obj/item/I, mob/living/user)
 	if(!I || !user || !user.canUseTopic(src))
-		return 0
+		return FALSE
 	else if(I.tool_behaviour == TOOL_WRENCH)
 		if(construction_state == GEAR_SECURE)
 			user.visible_message("<span class='notice'>[user] begins loosening [src]'s cogwheel...</span>", "<span class='notice'>You begin loosening [src]'s cogwheel...</span>")
 			if(!I.use_tool(src, user, 75, volume=50) || construction_state != GEAR_SECURE)
-				return 1
+				return TRUE
 			user.visible_message("<span class='notice'>[user] loosens [src]'s cogwheel!</span>", "<span class='notice'>[src]'s cogwheel pops off and dangles loosely.</span>")
 			playsound(src, 'sound/items/deconstruct.ogg', 50, 1)
 			construction_state = GEAR_LOOSE
 		else if(construction_state == GEAR_LOOSE)
 			user.visible_message("<span class='notice'>[user] begins tightening [src]'s cogwheel...</span>", "<span class='notice'>You begin tightening [src]'s cogwheel into place...</span>")
 			if(!I.use_tool(src, user, 75, volume=50) || construction_state != GEAR_LOOSE)
-				return 1
+				return TRUE
 			user.visible_message("<span class='notice'>[user] tightens [src]'s cogwheel!</span>", "<span class='notice'>You firmly tighten [src]'s cogwheel into place.</span>")
 			playsound(src, 'sound/items/deconstruct.ogg', 50, 1)
 			construction_state = GEAR_SECURE
-		return 1
+		return TRUE
 	else if(I.tool_behaviour == TOOL_CROWBAR)
 		if(construction_state == GEAR_SECURE)
 			to_chat(user, "<span class='warning'>[src]'s cogwheel is too tightly secured! Your [I.name] can't reach under it!</span>")
-			return 1
+			return TRUE
 		else if(construction_state == GEAR_LOOSE)
 			user.visible_message("<span class='notice'>[user] begins slowly lifting off [src]'s cogwheel...</span>", "<span class='notice'>You slowly begin lifting off [src]'s cogwheel...</span>")
 			if(!I.use_tool(src, user, 75, volume=50) || construction_state != GEAR_LOOSE)
-				return 1
+				return TRUE
 			user.visible_message("<span class='notice'>[user] lifts off [src]'s cogwheel, causing it to fall apart!</span>", \
 			"<span class='notice'>You lift off [src]'s cogwheel, causing it to fall apart!</span>")
 			deconstruct(TRUE)
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 /obj/machinery/door/airlock/clockwork/brass
 	glass = TRUE

code/game/machinery/doors/brigdoors.dm

@@ -81,7 +81,7 @@
 // linked door is open/closed (by density) then opens it/closes it.
 /obj/machinery/door_timer/proc/timer_start()
 	if(stat & (NOPOWER|BROKEN))
-		return 0
+		return FALSE
 
 	activation_time = REALTIMEOFDAY
 	timing = TRUE
@@ -98,12 +98,12 @@
 			continue
 		C.locked = TRUE
 		C.update_icon()
-	return 1
+	return TRUE
 
 /obj/machinery/door_timer/proc/timer_end(forced = FALSE)
 
 	if(stat & (NOPOWER|BROKEN))
-		return 0
+		return FALSE
 
 	if(!forced)
 		Radio.set_frequency(FREQ_SECURITY)
@@ -127,7 +127,7 @@
 		C.locked = FALSE
 		C.update_icon()
 
-	return 1
+	return TRUE
 
 
 /obj/machinery/door_timer/proc/time_left(seconds = FALSE)
@@ -137,7 +137,7 @@
 
 /obj/machinery/door_timer/proc/set_timer(value)
 	var/new_time = clamp(value,0,MAX_TIMER)
-	. = new_time == timer_duration //return 1 on no change
+	. = new_time == timer_duration //return TRUE on no change
 	timer_duration = new_time
 
 /obj/machinery/door_timer/ui_interact(mob/user, datum/tgui/ui)

code/game/machinery/doors/checkForMultipleDoors.dm

@@ -1,16 +1,16 @@
 /obj/machinery/door/proc/checkForMultipleDoors()
 	if(!src.loc)
-		return 0
+		return FALSE
 	for(var/obj/machinery/door/D in src.loc)
 		if(!istype(D, /obj/machinery/door/window) && D.density && D != src)
-			return 0
+			return FALSE
-	return 1
+	return TRUE
 
 /turf/closed/wall/proc/checkForMultipleDoors()
 	if(!src.loc)
-		return 0
+		return FALSE
 	for(var/obj/machinery/door/D in locate(src.x,src.y,src.z))
 		if(!istype(D, /obj/machinery/door/window) && D.density)
-			return 0
+			return FALSE
 	//There are no false wall checks because that would be fucking
-	return 1
+	return TRUE

code/game/machinery/doors/door.dm

@@ -222,13 +222,13 @@
 /obj/machinery/door/attackby(obj/item/I, mob/user, params)
 	if(user.a_intent != INTENT_HARM && (I.tool_behaviour == TOOL_CROWBAR || istype(I, /obj/item/fireaxe)))
 		try_to_crowbar(I, user)
-		return 1
+		return TRUE
 	else if(I.tool_behaviour == TOOL_WELDER)
 		try_to_weld(I, user)
-		return 1
+		return TRUE
 	else if(!(I.item_flags & NOBLUDGEON) && user.a_intent != INTENT_HARM)
 		try_to_activate_door(user)
-		return 1
+		return TRUE
 	return ..()
 
 /obj/machinery/door/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1, attack_dir)
@@ -284,7 +284,7 @@
 
 /obj/machinery/door/proc/open()
 	if(!density)
-		return 1
+		return TRUE
 	if(operating)
 		return
 	operating = TRUE
@@ -302,7 +302,7 @@
 	if(autoclose)
 		spawn(autoclose)
 			close()
-	return 1
+	return TRUE
 
 /obj/machinery/door/proc/close()
 	if(density)
@@ -335,7 +335,7 @@
 		CheckForMobs()
 	else if(!(flags_1 & ON_BORDER_1))
 		crush()
-	return 1
+	return TRUE
 
 /obj/machinery/door/proc/CheckForMobs()
 	if(locate(/mob/living) in get_turf(src))
@@ -380,7 +380,7 @@
 	addtimer(CALLBACK(src, .proc/autoclose), wait, TIMER_UNIQUE | TIMER_NO_HASH_WAIT | TIMER_OVERRIDE)
 
 /obj/machinery/door/proc/requiresID()
-	return 1
+	return TRUE
 
 /obj/machinery/door/proc/hasPower()
 	return !(stat & NOPOWER)
@@ -391,8 +391,8 @@
 
 /obj/machinery/door/BlockThermalConductivity() // All non-glass airlocks block heat, this is intended.
 	if(opacity || heat_proof)
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 /obj/machinery/door/morgue
 	icon = 'icons/obj/doors/doormorgue.dmi'

code/game/machinery/doors/firedoor.dm

@@ -393,7 +393,7 @@
 		for(var/T2 in T.atmos_adjacent_turfs)
 			turfs[T2] = 1
 	if(turfs.len <= 10)
-		return 0 // not big enough to matter
+		return FALSE // not big enough to matter
 	return start_point.air.return_pressure() < 20 ? -1 : 1
 
 /obj/machinery/door/firedoor/border_only/CanAllowThrough(atom/movable/mover, turf/target)

code/game/machinery/doors/passworddoor.dm

@@ -73,4 +73,4 @@
 	return
 
 /obj/machinery/door/password/wave_ex_act(power, datum/wave_explosion/explosion, dir)
-	return 0		//no.
+	return FALSE		//no.

code/game/machinery/doors/poddoor.dm

@@ -64,7 +64,7 @@
 
 /obj/machinery/door/poddoor/Bumped(atom/movable/AM)
 	if(density)
-		return 0
+		return FALSE
 	else
 		return ..()
 

code/game/machinery/doors/windowdoor.dm

@@ -129,7 +129,7 @@
 	if(get_dir(loc, T) == dir)
 		return !density
 	else
-		return 1
+		return TRUE
 
 //used in the AStar algorithm to determinate if the turf the door is on is passable
 /obj/machinery/door/window/CanAStarPass(obj/item/card/id/ID, to_dir)
@@ -144,13 +144,13 @@
 
 /obj/machinery/door/window/open(forced=0)
 	if (src.operating == 1) //doors can still open when emag-disabled
-		return 0
+		return FALSE
 	if(!forced)
 		if(!hasPower())
-			return 0
+			return FALSE
 	if(forced < 2)
 		if(obj_flags & EMAGGED)
-			return 0
+			return FALSE
 	if(!src.operating) //in case of emag
 		operating = TRUE
 	do_animate("opening")
@@ -171,13 +171,13 @@
 
 /obj/machinery/door/window/close(forced=0)
 	if (src.operating)
-		return 0
+		return FALSE
 	if(!forced)
 		if(!hasPower())
-			return 0
+			return FALSE
 	if(forced < 2)
 		if(obj_flags & EMAGGED)
-			return 0
+			return FALSE
 	operating = TRUE
 	do_animate("closing")
 	playsound(src.loc, 'sound/machines/windowdoor.ogg', 100, 1)
@@ -423,8 +423,8 @@
 
 /obj/machinery/door/window/clockwork/allowed(mob/M)
 	if(is_servant_of_ratvar(M))
-		return 1
+		return TRUE
-	return 0
+	return FALSE
 
 /obj/machinery/door/window/northleft
 	dir = NORTH

code/game/machinery/embedded_controller/access_controller.dm

@@ -164,7 +164,7 @@
 	set waitfor = FALSE
 	if(A.density)
 		goIdle()
-		return 0
+		return FALSE
 	update_icon()
 	A.unbolt()
 	. = 1

code/game/machinery/embedded_controller/airlock_controller.dm

@@ -190,7 +190,7 @@
 	memory["processing"] = state != target_state
 	//sensor_pressure = null //not sure if we can comment this out. Uncomment in case of problems -rastaf0
 
-	return 1
+	return TRUE
 
 
 /obj/machinery/embedded_controller/radio/airlock_controller

code/game/machinery/embedded_controller/embedded_controller_base.dm

@@ -19,7 +19,7 @@
 	return null
 
 /datum/computer/file/embedded_program/process()
-	return 0
+	return FALSE
 
 /obj/machinery/embedded_controller
 	var/datum/computer/file/embedded_program/program
@@ -44,7 +44,7 @@
 /obj/machinery/embedded_controller/proc/return_text()
 
 /obj/machinery/embedded_controller/proc/post_signal(datum/signal/signal, comm_line)
-	return 0
+	return FALSE
 
 /obj/machinery/embedded_controller/receive_signal(datum/signal/signal)
 	if(istype(signal) && program)
@@ -52,7 +52,7 @@
 
 /obj/machinery/embedded_controller/Topic(href, href_list)
 	if(..())
-		return 0
+		return FALSE
 
 	if(program)
 		program.receive_user_command(href_list["command"])

code/game/machinery/embedded_controller/simple_vent_controller.dm

@@ -28,7 +28,7 @@
 			)))
 
 /datum/computer/file/embedded_program/simple_vent_controller/process()
-	return 0
+	return FALSE
 
 
 /obj/machinery/embedded_controller/radio/simple_vent_controller

code/game/machinery/flasher.dm

@@ -94,7 +94,7 @@
 
 /obj/machinery/flasher/run_obj_armor(damage_amount, damage_type, damage_flag = 0, attack_dir)
 	if(damage_flag == MELEE && damage_amount < 10) //any melee attack below 10 dmg does nothing
-		return 0
+		return FALSE
 	. = ..()
 
 /obj/machinery/flasher/proc/flash()
@@ -126,7 +126,7 @@
 	if(flashed)
 		bulb.times_used++
 
-	return 1
+	return TRUE
 
 
 /obj/machinery/flasher/emp_act(severity)

code/game/machinery/igniter.dm

@@ -38,7 +38,7 @@
 		var/turf/location = src.loc
 		if (isturf(location))
 			location.hotspot_expose(700,10,1)
-	return 1
+	return TRUE
 
 /obj/machinery/igniter/Initialize(mapload)
 	. = ..()
@@ -127,7 +127,7 @@
 	var/turf/location = src.loc
 	if (isturf(location))
 		location.hotspot_expose(1000,100,1)
-	return 1
+	return TRUE
 
 /obj/machinery/sparker/emp_act(severity)
 	. = ..()

code/game/machinery/pipe/pipe_dispenser.dm

@@ -33,11 +33,11 @@
 
 /obj/machinery/pipedispenser/Topic(href, href_list)
 	if(..())
-		return 1
+		return TRUE
 	var/mob/living/L = usr
 	if(!anchored || !istype(L) || !CHECK_MOBILITY(L, MOBILITY_USE))
 		usr << browse(null, "window=pipedispenser")
-		return 1
+		return TRUE
 	usr.set_machine(src)
 	add_fingerprint(usr)
 	if(href_list["makepipe"])
@@ -130,7 +130,7 @@
 
 /obj/machinery/pipedispenser/disposal/Topic(href, href_list)
 	if(..())
-		return 1
+		return TRUE
 	usr.set_machine(src)
 	add_fingerprint(usr)
 	if(href_list["dmake"])
@@ -181,7 +181,7 @@
 
 /obj/machinery/pipedispenser/disposal/transit_tube/Topic(href, href_list)
 	if(..())
-		return 1
+		return TRUE
 	usr.set_machine(src)
 	add_fingerprint(usr)
 	if(wait < world.time)

code/game/machinery/porta_turret/portable_turret.dm

@@ -513,7 +513,7 @@ DEFINE_BITFIELD(turret_flags, list(
 		var/atom/movable/M = pick(targets)
 		targets -= M
 		if(target(M))
-			return 1
+			return TRUE
 
 /obj/machinery/porta_turret/proc/popUp()	//pops the turret up
 	set waitfor = FALSE
@@ -566,8 +566,8 @@ DEFINE_BITFIELD(turret_flags, list(
 	if(turret_flags & TURRET_FLAG_AUTH_WEAPONS)	//check for weapon authorization
 		if(isnull(perp.wear_id) || istype(perp.wear_id.GetID(), /obj/item/card/id/syndicate))
 
-			if(allowed(perp)) //if the perp has security access, return 0
+			if(allowed(perp)) //if the perp has security access, return FALSE
-				return 0
+				return FALSE
 			if(perp.is_holding_item_of_type(/obj/item/gun) ||  perp.is_holding_item_of_type(/obj/item/melee/baton))
 				threatcount += 4
 
@@ -585,7 +585,7 @@ DEFINE_BITFIELD(turret_flags, list(
 
 	// If we aren't shooting heads then return a threatcount of 0
 	if (!(turret_flags & TURRET_FLAG_SHOOT_HEADS) && (perp.get_assignment() in GLOB.command_positions))
-		return 0
+		return FALSE
 
 	return threatcount
 
@@ -600,7 +600,7 @@ DEFINE_BITFIELD(turret_flags, list(
 		popUp()				//pop the turret up if it's not already up.
 		setDir(get_dir(base, target))//even if you can't shoot, follow the target
 		INVOKE_ASYNC(src, .proc/shootAt, target)
-		return 1
+		return TRUE
 	return
 
 /obj/machinery/porta_turret/proc/shootAt(atom/movable/target, stagger_enabled = FALSE)
@@ -840,7 +840,7 @@ DEFINE_BITFIELD(turret_flags, list(
 	faction = list("neutral","silicon","turret") //Minebots, medibots, etc that should not be shot.
 
 /obj/machinery/porta_turret/aux_base/assess_perp(mob/living/carbon/human/perp)
-	return 0 //Never shoot humanoids. You are on your own if Ashwalkers or the like attack!
+	return FALSE //Never shoot humanoids. You are on your own if Ashwalkers or the like attack!
 
 /obj/machinery/porta_turret/aux_base/setup()
 	return
@@ -874,7 +874,7 @@ DEFINE_BITFIELD(turret_flags, list(
 	AddElement(/datum/element/empprotection, EMP_PROTECT_SELF | EMP_PROTECT_WIRES)
 
 /obj/machinery/porta_turret/centcom_shuttle/assess_perp(mob/living/carbon/human/perp)
-	return 0
+	return FALSE
 
 /obj/machinery/porta_turret/centcom_shuttle/setup()
 	return

code/game/machinery/recharger.dm

@@ -80,27 +80,27 @@
 	if(allowed)
 		if(anchored)
 			if(charging || panel_open)
-				return 1
+				return TRUE
 
 			//Checks to make sure he's not in space doing it, and that the area got proper power.
 			var/area/a = get_area(src)
 			if(!a || !a.powered(EQUIP))
 				to_chat(user, "<span class='notice'>[src] blinks red as you try to insert [G].</span>")
-				return 1
+				return TRUE
 
 			if (istype(G, /obj/item/gun/energy))
 				var/obj/item/gun/energy/E = G
 				if(!E.can_charge)
 					to_chat(user, "<span class='notice'>Your gun has no external power connector.</span>")
-					return 1
+					return TRUE
 
 			if(!user.transferItemToLoc(G, src))
-				return 1
+				return TRUE
 			setCharging(G)
 
 		else
 			to_chat(user, "<span class='notice'>[src] isn't connected to anything!</span>")
-		return 1
+		return TRUE
 
 	if(anchored && !charging)
 		if(default_deconstruction_screwdriver(user, "recharger", "recharger", G))

code/game/machinery/rechargestation.dm

@@ -63,7 +63,7 @@
 
 	if(occupant)
 		process_occupant()
-	return 1
+	return TRUE
 
 /obj/machinery/recharge_station/relaymove(mob/user)
 	if(user.stat)

code/game/machinery/suit_storage_unit.dm

@@ -372,7 +372,7 @@
 		s.set_up(5, 1, src)
 		s.start()
 		if(electrocute_mob(user, src, src, 1, TRUE))
-			return 1
+			return TRUE
 
 /obj/machinery/suit_storage_unit/relaymove(mob/user)
 	if(locked)

code/game/objects/buckling.dm

@@ -20,10 +20,10 @@
 		if(buckled_mobs.len > 1)
 			var/unbuckled = input(user, "Who do you wish to unbuckle?","Unbuckle Who?") as null|mob in buckled_mobs
 			if(user_unbuckle_mob(unbuckled,user))
-				return 1
+				return TRUE
 		else
 			if(user_unbuckle_mob(buckled_mobs[1],user))
-				return 1
+				return TRUE
 
 /atom/movable/attackby(obj/item/attacking_item, mob/user, params)
 	if(!can_buckle || !istype(attacking_item, /obj/item/riding_offhand) || !user.Adjacent(src))

code/game/objects/effects/alien_acid.dm

@@ -36,7 +36,7 @@
 	. = 1
 	if(!target)
 		qdel(src)
-		return 0
+		return FALSE
 
 	if(prob(5))
 		playsound(loc, 'sound/items/welder.ogg', 100, 1)
@@ -51,7 +51,7 @@
 	acid_level = max(acid_level - (5 + 2*round(sqrt(acid_level))), 0)
 	if(acid_level <= 0)
 		qdel(src)
-		return 0
+		return FALSE
 
 /obj/effect/acid/Crossed(AM as mob|obj)
 	. = ..()

code/game/objects/effects/effect_system/effects_foam.dm

@@ -169,14 +169,14 @@
 
 /obj/effect/particle_effect/foam/proc/foam_mob(mob/living/L)
 	if(lifetime<1)
-		return 0
+		return FALSE
 	if(!istype(L))
-		return 0
+		return FALSE
 	var/fraction = 1/initial(reagent_divisor)
 	if(lifetime % reagent_divisor)
 		reagents.reaction(L, VAPOR, fraction)
 	lifetime--
-	return 1
+	return TRUE
 
 /obj/effect/particle_effect/foam/proc/spread_foam()
 	var/turf/t_loc = get_turf(src)