diff --git a/code/ZAS/Airflow.dm b/code/ZAS/Airflow.dm
new file mode 100644
index 00000000000..486b0bdc6a9
--- /dev/null
+++ b/code/ZAS/Airflow.dm
@@ -0,0 +1,587 @@
+/*
+
+CONTAINS:
+All AirflowX() procs, all Variable Setting Controls for airflow, save/load variable tweaks for airflow.
+
+VARIABLES:
+
+atom/movable/airflow_dest
+	The destination turf of a flying object.
+
+atom/movable/airflow_speed
+	The speed (1-15) at which a flying object is traveling to airflow_dest. Decays over time.
+
+
+CALLABLE PROCS:
+
+AirflowRepel(turf/T, n, per)
+	Causes objects to fly away from a point within a single zone.
+	Called manually by air releasers. T is the location of the expanding gas.
+	n is the pressure released. per indicates that n is a percent value if nonzero.
+	RETURNS: Null
+
+AirflowAttract(turf/T, n, per)
+	Causes objects to fly to a point within a single zone.
+	Called manually by air consumers. T is the location of the attractor.
+	n is the pressure consumed. per indicates that n is a percent value if nonzero.
+	RETURNS: Null
+
+
+OVERLOADABLE PROCS:
+
+mob/airflow_stun()
+	Contains checks for and results of being stunned by airflow.
+	Called when airflow quantities exceed AF_HUMAN_STUN_THRESHOLD.
+	RETURNS: Null
+
+atom/movable/check_airflow_movable(n)
+	Contains checks for moving any object due to airflow.
+	n is the percent of 1 Atmosphere that is flowing.
+	RETURNS: 1 if the object moves under the air conditions, 0 if it stays put.
+
+atom/movable/airflow_hit(atom/A)
+	Contains results of hitting a solid object (A) due to airflow.
+	A is the dense object hit.
+	Use airflow_speed to determine how fast the projectile was going.
+
+
+AUTOMATIC PROCS:
+
+Airflow(zone/A, zone/B, n)
+	Causes objects to fly along a pressure gradient.
+	Called by zone updates. A and B are two connected zones.
+	n is the pressure difference between them.
+
+AirflowSpace(zone/A)
+	Causes objects to fly into space.
+	Called by zone updates. A is a zone connected to space.
+
+atom/movable/GotoAirflowDest(n)
+atom/movable/RepelAirflowDest(n)
+	Called by main airflow procs to cause the object to fly to or away from destination at speed n.
+	Probably shouldn't call this directly unless you know what you're
+	doing and have set airflow_dest. airflow_hit() will be called if the object collides with an obstacle.
+
+*/
+
+var/tick_multiplier = 2
+vs_control/var
+
+	zone_update_delay = 10
+	zone_update_delay_NAME = "Zone Update Delay"
+	zone_update_delay_DESC = "The delay in ticks between updates of zones. Increase if lag is bad seemingly because of air."
+
+	zone_share_percent = 2
+	zone_share_percent_NAME = "Zone Connection Transfer %"
+	zone_share_percent_DESC = "Percent of gas per connected tile that is shared between zones."
+
+	//Used in /mob/carbon/human/life
+	OXYGEN_LOSS = 2
+	OXYGEN_LOSS_NAME = "Damage - Oxygen Loss"
+	OXYGEN_LOSS_DESC = "A multiplier for damage due to lack of air, CO2 poisoning, and vacuum. Does not affect oxyloss\
+	from being incapacitated or dying."
+	TEMP_DMG = 2
+	TEMP_DMG_NAME = "Damage - Temperature"
+	TEMP_DMG_DESC = "A multiplier for damage due to body temperature irregularities."
+	BURN_DMG = 6
+	BURN_DMG_NAME = "Damage - Fire"
+	BURN_DMG_DESC = "A multiplier for damage due to direct fire exposure."
+
+	AF_TINY_MOVEMENT_THRESHOLD = 50 //% difference to move tiny items.
+	AF_TINY_MOVEMENT_THRESHOLD_NAME = "Airflow - Tiny Movement Threshold %"
+	AF_TINY_MOVEMENT_THRESHOLD_DESC = "Percent of 1 Atm. at which items with the tiny weight class will move."
+	AF_SMALL_MOVEMENT_THRESHOLD = 70 //% difference to move small items.
+	AF_SMALL_MOVEMENT_THRESHOLD_NAME = "Airflow - Small Movement Threshold %"
+	AF_SMALL_MOVEMENT_THRESHOLD_DESC = "Percent of 1 Atm. at which items with the small weight class will move."
+	AF_NORMAL_MOVEMENT_THRESHOLD = 90 //% difference to move normal items.
+	AF_NORMAL_MOVEMENT_THRESHOLD_NAME = "Airflow - Normal Movement Threshold %"
+	AF_NORMAL_MOVEMENT_THRESHOLD_DESC = "Percent of 1 Atm. at which items with the normal weight class will move."
+	AF_LARGE_MOVEMENT_THRESHOLD = 100 //% difference to move large and huge items.
+	AF_LARGE_MOVEMENT_THRESHOLD_NAME = "Airflow - Large Movement Threshold %"
+	AF_LARGE_MOVEMENT_THRESHOLD_DESC = "Percent of 1 Atm. at which items with the large or huge weight class will move."
+	AF_DENSE_MOVEMENT_THRESHOLD = 120 //% difference to move dense crap and mobs.
+	AF_DENSE_MOVEMENT_THRESHOLD_NAME = "Airflow - Dense Movement Threshold %"
+	AF_DENSE_MOVEMENT_THRESHOLD_DESC = "Percent of 1 Atm. at which dense objects (canisters, etc.) will be shifted by airflow."
+	AF_MOB_MOVEMENT_THRESHOLD = 175
+	AF_MOB_MOVEMENT_THRESHOLD_NAME = "Airflow - Human Movement Threshold %"
+	AF_MOB_MOVEMENT_THRESHOLD_DESC = "Percent of 1 Atm. at which mobs will be shifted by airflow."
+
+	AF_HUMAN_STUN_THRESHOLD = 130
+	AF_HUMAN_STUN_THRESHOLD_NAME = "Airflow - Human Stun Threshold %"
+	AF_HUMAN_STUN_THRESHOLD_DESC = "Percent of 1 Atm. at which living things are stunned or knocked over."
+
+	AF_PERCENT_OF = ONE_ATMOSPHERE
+	AF_PERCENT_OF_NAME = "Airflow - 100% Pressure"
+	AF_PERCENT_OF_DESC = "Normally set to 1 Atm. in kPa, this indicates what pressure is considered 100% by the system."
+
+	AF_SPEED_MULTIPLIER = 4 //airspeed per movement threshold value crossed.
+	AF_SPEED_MULTIPLIER_NAME = "Airflow - Speed Increase per 10%"
+	AF_SPEED_MULTIPLIER_DESC = "Velocity increase of shifted items per 10% of airflow."
+	AF_DAMAGE_MULTIPLIER = 5 //Amount of damage applied per airflow_speed.
+	AF_DAMAGE_MULTIPLIER_NAME = "Airflow - Damage Per Velocity"
+	AF_DAMAGE_MULTIPLIER_DESC = "Amount of damage applied per unit of speed (1-15 units) at which mobs are thrown."
+	AF_STUN_MULTIPLIER = 1.5 //Seconds of stun applied per airflow_speed.
+	AF_STUN_MULTIPLIER_NAME = "Airflow - Stun Per Velocity"
+	AF_STUN_MULTIPLIER_DESC = "Amount of stun effect applied per unit of speed (1-15 units) at which mobs are thrown."
+	AF_SPEED_DECAY = 0.5 //Amount that flow speed will decay with time.
+	AF_SPEED_DECAY_NAME = "Airflow - Velocity Lost per Tick"
+	AF_SPEED_DECAY_DESC = "Amount of airflow speed lost per tick on a moving object."
+	AF_SPACE_MULTIPLIER = 2 //Increasing this will make space connections more DRAMATIC!
+	AF_SPACE_MULTIPLIER_NAME = "Airflow - Space Airflow Multiplier"
+	AF_SPACE_MULTIPLIER_DESC = "Increasing this multiplier will cause more powerful airflow to space."
+	AF_CANISTER_MULTIPLIER = 0.25
+	AF_CANISTER_MULTIPLIER_NAME = "Airflow - Canister Airflow Multiplier"
+	AF_CANISTER_MULTIPLIER_DESC = "Increasing this multiplier will cause more powerful airflow from single-tile sources like canisters."
+
+mob/proc
+	Change_Airflow_Constants()
+		set category = "Debug"
+
+		var/choice = input("Which constant will you modify?","Change Airflow Constants")\
+		as null|anything in list("Movement Threshold","Speed Multiplier","Damage Multiplier","Stun Multiplier","Speed Decay")
+
+		var/n
+
+		switch(choice)
+			if("Movement Threshold")
+				n = input("What will you change it to","Change Airflow Constants",vsc.AF_DENSE_MOVEMENT_THRESHOLD) as num
+				n = max(1,n)
+				vsc.AF_DENSE_MOVEMENT_THRESHOLD = n
+				world.log << "vsc.AF_DENSE_MOVEMENT_THRESHOLD set to [n]."
+			if("Speed Multiplier")
+				n = input("What will you change it to","Change Airflow Constants",vsc.AF_SPEED_MULTIPLIER) as num
+				n = max(1,n)
+				vsc.AF_SPEED_MULTIPLIER = n
+				world.log << "vsc.AF_SPEED_MULTIPLIER set to [n]."
+			if("Damage Multiplier")
+				n = input("What will you change it to","Change Airflow Constants",vsc.AF_DAMAGE_MULTIPLIER) as num
+				vsc.AF_DAMAGE_MULTIPLIER = n
+				world.log << "AF_DAMAGE_MULTIPLIER set to [n]."
+			if("Stun Multiplier")
+				n = input("What will you change it to","Change Airflow Constants",vsc.AF_STUN_MULTIPLIER) as num
+				vsc.AF_STUN_MULTIPLIER = n
+				world.log << "AF_STUN_MULTIPLIER set to [n]."
+			if("Speed Decay")
+				n = input("What will you change it to","Change Airflow Constants",vsc.AF_SPEED_DECAY) as num
+				vsc.AF_SPEED_DECAY = n
+				world.log << "AF_SPEED_DECAY set to [n]."
+			if("Space Flow Multiplier")
+				n = input("What will you change it to","Change Airflow Constants",vsc.AF_SPEED_DECAY) as num
+				vsc.AF_SPEED_DECAY = n
+				world.log << "AF_SPEED_DECAY set to [n]."
+
+
+//The main airflow code. Called by zone updates.
+//Zones A and B are air zones. n represents the amount of air moved.
+
+mob/proc/airflow_stun()
+	if(weakened <= 0) src << "\red The sudden rush of air knocks you over!"
+	weakened = max(weakened,5)
+
+mob/living/silicon/airflow_stun()
+	return
+
+mob/living/carbon/metroid/airflow_stun()
+	return
+
+mob/living/carbon/human/airflow_stun()
+	if(buckled) return 0
+	if(wear_suit)
+		if(wear_suit.flags & SUITSPACE) return 0
+	if(shoes)
+		if(shoes.flags & NOSLIP) return 0
+	if(weakened <= 0) src << "\red The sudden rush of air knocks you over!"
+	weakened = max(weakened,2)
+
+atom/movable/proc/check_airflow_movable(n)
+
+	if(anchored && !ismob(src)) return 0
+
+	if(!istype(src,/obj/item) && n < vsc.AF_DENSE_MOVEMENT_THRESHOLD) return 0
+	if(ismob(src) && n < vsc.AF_MOB_MOVEMENT_THRESHOLD) return 0
+
+	return 1
+
+mob/dead/observer/check_airflow_movable()
+	return 0
+
+mob/living/silicon/check_airflow_movable()
+	return 0
+
+
+obj/item/check_airflow_movable(n)
+	. = ..()
+	switch(w_class)
+		if(2)
+			if(n < vsc.AF_SMALL_MOVEMENT_THRESHOLD) return 0
+		if(3)
+			if(n < vsc.AF_NORMAL_MOVEMENT_THRESHOLD) return 0
+		if(4,5)
+			if(n < vsc.AF_LARGE_MOVEMENT_THRESHOLD) return 0
+
+proc/Airflow(zone/A,zone/B,n)
+
+	 //Now n is a percent of one atm.
+	n = round((n/vsc.AF_PERCENT_OF)*100,0.1)
+
+	 //Don't go any further if n is lower than the lowest value needed for airflow.
+	if(abs(n) < vsc.AF_TINY_MOVEMENT_THRESHOLD) return
+
+	//These turfs are the midway point between A and B, and will be the destination point for thrown objects.
+	var/list/connected_turfs = A.connections[B]
+
+	//Get lists of things that can be thrown across the room for each zone.
+	var/list/pplz = A.movables()
+	var/list/otherpplz = B.movables()
+
+	for(var/atom/movable/M in pplz)
+
+		//Check for knocking people over
+		if(ismob(M) && n > vsc.AF_HUMAN_STUN_THRESHOLD)
+			if(M:nodamage) continue
+			M:airflow_stun()
+
+		if(M.check_airflow_movable(n))
+
+			//Check for things that are in range of the midpoint turfs.
+			var/fail = 1
+			for(var/turf/U in connected_turfs)
+				if(M in range(U)) fail = 0
+			if(fail) continue
+
+			//If they're already being tossed, don't do it again.
+			if(!M.airflow_speed)
+
+				M.airflow_dest = pick(connected_turfs) //Pick a random midpoint to fly towards.
+
+				spawn M.GotoAirflowDest(abs(n) * (vsc.AF_SPEED_MULTIPLIER/10))
+				//Send the object flying at a speed determined by n and AF_SPEED_MULTIPLIER.
+
+	//Do it again for the stuff in the other zone, making it fly away.
+	for(var/atom/movable/M in otherpplz)
+
+		if(ismob(M) && abs(n) > vsc.AF_HUMAN_STUN_THRESHOLD)
+			if(M:nodamage) continue
+			M:airflow_stun()
+
+		if(M.check_airflow_movable(abs(n)))
+
+			var/fail = 1
+			for(var/turf/U in connected_turfs)
+				if(M in range(U)) fail = 0
+			if(fail) continue
+
+			if(M && !M.airflow_speed)
+
+				M.airflow_dest = pick(connected_turfs)
+
+				spawn M.RepelAirflowDest(abs(n) * (vsc.AF_SPEED_MULTIPLIER/10))
+
+proc/AirflowSpace(zone/A)
+
+	//The space version of the Airflow(A,B,n) proc.
+
+	var/n = (A.air.oxygen + A.air.nitrogen + A.air.carbon_dioxide)*vsc.AF_SPACE_MULTIPLIER
+	//Here, n is determined by the space multiplier constant and the zone's air.
+
+	n = round((n/vsc.AF_PERCENT_OF)*100,0.1)
+
+	if(n < vsc.AF_TINY_MOVEMENT_THRESHOLD) return
+
+	var/list/connected_turfs = A.space_tiles //The midpoints are now all the space connections.
+	var/list/pplz = A.movables() //We only need to worry about things in the zone, not things in space.
+
+	for(var/atom/movable/M in pplz)
+
+		if(ismob(M) && n > vsc.AF_HUMAN_STUN_THRESHOLD)
+			if(M:nodamage) continue
+			M:airflow_stun()
+
+		if(M.check_airflow_movable(n))
+
+			var/fail = 1
+			for(var/turf/U in connected_turfs)
+				if(M in range(U)) fail = 0
+			if(fail) continue
+
+			if(!M.airflow_speed)
+				M.airflow_dest = pick(connected_turfs)
+				spawn
+					if(M) M.GotoAirflowDest(n * (vsc.AF_SPEED_MULTIPLIER/10))
+					//Sometimes shit breaks, and M isn't there after the spawn.
+
+proc/AirflowRepel(turf/T,n,per = 0)
+
+	//This one is used for air escaping from canisters.
+	var/zone/A = T.zone
+	if(!A) return
+
+	n *= vsc.AF_CANISTER_MULTIPLIER
+
+	if(!per)
+		n = round((n/vsc.AF_PERCENT_OF) * 100,0.1)
+
+	if(n < 0) return
+	if(abs(n) > vsc.AF_TINY_MOVEMENT_THRESHOLD)
+
+		var/list/pplz = A.movables()
+
+		for(var/atom/movable/M in pplz)
+			var/relative_n = n / max(1,get_dist(T,M)/2)
+			if(ismob(M) && relative_n > vsc.AF_HUMAN_STUN_THRESHOLD)
+				if(M:nodamage) continue
+				M:airflow_stun()
+
+			if(M.check_airflow_movable(relative_n))
+
+				if(!(M in range(T))) continue //Recall that T is the center of the repelling force.
+
+				if(!M.airflow_speed)
+					M.airflow_dest = T
+					spawn M.RepelAirflowDest(relative_n * (vsc.AF_SPEED_MULTIPLIER/10))
+
+proc/AirflowAttract(turf/T,n,per=0)
+
+	//Same as above, but attracts objects to the target.
+
+	var/zone/A = T.zone
+	if(!A) return
+
+	n *= vsc.AF_CANISTER_MULTIPLIER
+
+	if(!per)
+		n = round((n/vsc.AF_PERCENT_OF) * 100,0.1)
+
+	if(n < 0) return
+	if(abs(n) > vsc.AF_TINY_MOVEMENT_THRESHOLD)
+		//world << "Airflow!"
+		var/list/pplz = A.movables()
+		for(var/atom/movable/M in pplz)
+			//world << "[M] / \..."
+
+			var/relative_n = n / max(1,get_dist(T,M)/2)
+
+			if(ismob(M) && relative_n > vsc.AF_HUMAN_STUN_THRESHOLD)
+				if(M:nodamage) continue
+				M:airflow_stun()
+
+			if(M.check_airflow_movable(relative_n))
+
+				if(!(M in range(T))) continue
+
+				if(!M.airflow_speed)
+					M.airflow_dest = T
+					spawn M.GotoAirflowDest(relative_n * (vsc.AF_SPEED_MULTIPLIER/10))
+
+atom/movable
+	var/turf/airflow_dest
+	var/airflow_speed = 0
+	var/airflow_time = 0
+
+	proc/GotoAirflowDest(n)
+		if(!airflow_dest) return
+		if(airflow_speed < 0) return
+		if(airflow_speed)
+			airflow_speed = n
+			return
+		if(airflow_dest == loc)
+			step_away(src,loc)
+		if(ismob(src))
+			if(src:nodamage) return
+			if(istype(src, /mob/living/carbon/human))
+				if(istype(src, /mob/living/carbon/human))
+					if(src:buckled) return
+					if(src:wear_suit)
+						if(src:wear_suit.flags & SUITSPACE) return
+					if(src:shoes)
+						if(src:shoes.type == /obj/item/clothing/shoes/magboots) return
+			src << "\red You are sucked away by airflow!"
+		airflow_speed = min(round(n),9)
+		var
+			xo = airflow_dest.x - src.x
+			yo = airflow_dest.y - src.y
+			od = 0
+		airflow_dest = null
+		if(!density)
+			density = 1
+			od = 1
+		while(airflow_speed > 0)
+			if(airflow_speed <= 0) return
+			airflow_speed = min(airflow_speed,15)
+			airflow_speed -= vsc.AF_SPEED_DECAY
+			if(airflow_speed > 7)
+				if(airflow_time++ >= airflow_speed - 7)
+					sleep(1 * tick_multiplier)
+			else
+				sleep(max(1,10-(airflow_speed+3)) * tick_multiplier)
+			if ((!( src.airflow_dest ) || src.loc == src.airflow_dest))
+				src.airflow_dest = locate(min(max(src.x + xo, 1), world.maxx), min(max(src.y + yo, 1), world.maxy), src.z)
+			if ((src.x == 1 || src.x == world.maxx || src.y == 1 || src.y == world.maxy))
+				return
+			step_towards(src, src.airflow_dest)
+			if(ismob(src) && src:client) src:client:move_delay = world.time + 10
+		airflow_dest = null
+		airflow_speed = -1
+		spawn(150 * tick_multiplier) airflow_speed = 0
+		if(od)
+			density = 0
+
+	proc/RepelAirflowDest(n)
+		if(!airflow_dest) return
+		if(airflow_speed < 0) return
+		if(airflow_speed)
+			airflow_speed = n
+			return
+		if(airflow_dest == loc)
+			step_away(src,loc)
+		if(ismob(src))
+			if(src:nodamage) return
+			if(istype(src, /mob/living/carbon/human))
+				if(istype(src, /mob/living/carbon/human))
+					if(src:buckled) return
+					if(src:wear_suit)
+						if(src:wear_suit.flags & SUITSPACE) return
+					if(src:shoes)
+						if(src:shoes.type == /obj/item/clothing/shoes/magboots) return
+			src << "\red You are pushed away by airflow!"
+		airflow_speed = min(round(n),9)
+		var
+			xo = -(airflow_dest.x - src.x)
+			yo = -(airflow_dest.y - src.y)
+			od = 0
+		airflow_dest = null
+		if(!density)
+			density = 1
+			od = 1
+		while(airflow_speed > 0)
+			if(airflow_speed <= 0) return
+			airflow_speed = min(airflow_speed,15)
+			airflow_speed -= vsc.AF_SPEED_DECAY
+			if(airflow_speed > 7)
+				if(airflow_time++ >= airflow_speed - 7)
+					sleep(1 * tick_multiplier)
+			else
+				sleep(max(1,10-(airflow_speed+3)) * tick_multiplier)
+			if ((!( src.airflow_dest ) || src.loc == src.airflow_dest))
+				src.airflow_dest = locate(min(max(src.x + xo, 1), world.maxx), min(max(src.y + yo, 1), world.maxy), src.z)
+			if ((src.x == 1 || src.x == world.maxx || src.y == 1 || src.y == world.maxy))
+				return
+			step_towards(src, src.airflow_dest)
+			if(ismob(src) && src:client) src:client:move_delay = world.time + 10
+		airflow_dest = null
+		airflow_speed = -1
+		spawn(150 * tick_multiplier) airflow_speed = 0
+		if(od)
+			density = 0
+
+	Bump(atom/A)
+		if(airflow_speed > 0 && airflow_dest)
+			airflow_hit(A)
+		else
+			airflow_speed = 0
+			. = ..()
+
+atom/movable/proc/airflow_hit(atom/A)
+	airflow_speed = -1
+	spawn(50 * tick_multiplier) airflow_speed = 0
+	airflow_dest = null
+
+mob/airflow_hit(atom/A)
+	for(var/mob/M in hearers(src))
+		M.show_message("\red <B>[src] slams into [A]!</B>",1,"\red You hear a loud slam!",2)
+	playsound(src.loc, "smash.ogg", 25, 1, -1)
+	. = ..()
+
+obj/airflow_hit(atom/A)
+	for(var/mob/M in hearers(src))
+		M.show_message("\red <B>[src] slams into [A]!</B>",1,"\red You hear a loud slam!",2)
+	playsound(src.loc, "smash.ogg", 25, 1, -1)
+	. = ..()
+
+obj/item/airflow_hit(atom/A)
+	airflow_speed = -1
+	spawn(50 * tick_multiplier) airflow_speed = 0
+	airflow_dest = null
+
+mob/living/carbon/human/airflow_hit(atom/A)
+	for(var/mob/M in hearers(src))
+		M.show_message("\red <B>[src] slams into [A]!</B>",1,"\red You hear a loud slam!",2)
+	playsound(src.loc, "punch", 25, 1, -1)
+	loc:add_blood(src)
+	if (src.wear_suit)
+		src.wear_suit.add_blood(src)
+	if (src.w_uniform)
+		src.w_uniform.add_blood(src)
+	var/b_loss = airflow_speed * vsc.AF_DAMAGE_MULTIPLIER
+	for(var/organ in src:organs)
+		var/datum/organ/external/temp = src:organs["[organ]"]
+		if (istype(temp, /datum/organ/external))
+			switch(temp.name)
+				if("head")
+					temp.take_damage(b_loss * 0.2, 0)
+				if("chest")
+					temp.take_damage(b_loss * 0.4, 0)
+				if("diaper")
+					temp.take_damage(b_loss * 0.1, 0)
+	spawn UpdateDamageIcon()
+	if(airflow_speed > 10)
+		paralysis += round(airflow_speed * vsc.AF_STUN_MULTIPLIER)
+		stunned = max(stunned,paralysis + 3)
+	else
+		stunned += round(airflow_speed * vsc.AF_STUN_MULTIPLIER/2)
+	. = ..()
+
+zone/proc/movables()
+	. = list()
+	for(var/turf/T in contents)
+		for(var/atom/A in T)
+			. += A
+
+proc/Get_Dir(atom/S,atom/T) //Shamelessly stolen from AJX.AdvancedGetDir
+	var/GDist=get_dist(S,T)
+	var/GDir=get_dir(S,T)
+	if(GDist<=3)
+		if(GDist==0) return 0
+		if(GDist==1)
+			return GDir
+
+
+	var/X1=S.x*10
+	var/X2=T.x*10
+	var/Y1=S.y*10
+	var/Y2=T.y*10
+	var/Ref
+	if(GDir==NORTHEAST)
+		Ref=(X2/X1)*Y1
+		if(Ref-1>Y2) .=EAST
+		else if(Ref+1<Y2) .=NORTH
+		else .=NORTHEAST
+	else if(GDir==NORTHWEST)
+		Ref=(1+((1-(X2/X1))))*Y1
+		if(Ref-1>Y2) .=WEST
+		else if(Ref+1<Y2) .=NORTH
+		else .=NORTHWEST
+	else if(GDir==SOUTHEAST)
+		Ref=(1-((X2/X1)-1))*Y1
+		if(Ref-1>Y2) .=SOUTH
+		else if(Ref+1<Y2) .=EAST
+		else .=SOUTHEAST
+	else if(GDir==SOUTHWEST)
+		Ref=(X2/X1)*Y1
+		if(Ref-1>Y2) .=SOUTH
+		else if(Ref+1<Y2) .=WEST
+		else .=SOUTHWEST
+	else
+		return GDir
+
+proc/SaveTweaks()
+	var/savefile/F = new("data/game_settings.sav")
+	F << vsc
+	del F
+	world.log << "TWEAKS: Airflow, Plasma and Damage settings saved."
+proc/LoadTweaks()
+	if(fexists("data/game_settings.sav"))
+		var/savefile/F = new("data/game_settings.sav")
+		F >> vsc
+		del F
+		world.log << "TWEAKS: Airflow, Plasma and Damage settings loaded."
\ No newline at end of file
diff --git a/code/ZAS/Connection.dm b/code/ZAS/Connection.dm
new file mode 100644
index 00000000000..bf43f90d1c0
--- /dev/null
+++ b/code/ZAS/Connection.dm
@@ -0,0 +1,61 @@
+connection
+	var
+		turf //The turfs involved in the connection.
+			A
+			B
+		indirect = 0 //If the connection is purely indirect, the zones should not join.
+		last_updated //The tick at which this was last updated.
+	New(turf/T,turf/O)
+		A = T
+		B = O
+		if(A.zone)
+			if(!A.zone.connections) A.zone.connections = new()
+			A.zone.connections += src
+		if(B.zone)
+			if(!B.zone.connections) B.zone.connections = new()
+			B.zone.connections += src
+		if(A.zone && B.zone)
+			if(!A.zone.connected_zones)
+				A.zone.connected_zones = list()
+			if(!B.zone.connected_zones)
+				B.zone.connected_zones = list()
+
+			if(!(B.zone in A.zone.connected_zones))
+				A.zone.connected_zones += B.zone
+				A.zone.connected_zones[B.zone] = 1
+			else
+				A.zone.connected_zones[B.zone]++
+
+			if(!(A.zone in B.zone.connected_zones))
+				B.zone.connected_zones += A.zone
+				B.zone.connected_zones[A.zone] = 1
+			else
+				B.zone.connected_zones[A.zone]++
+	Del()
+		if(A.zone && A.zone.connections)
+			A.zone.connections -= src
+		if(B.zone && B.zone.connections)
+			B.zone.connections -= src
+
+		if(A.zone && B.zone)
+
+			if(B.zone in A.zone.connected_zones)
+				if(A.zone.connected_zones[B.zone] > 1)
+					A.zone.connected_zones[B.zone]--
+				else
+					A.zone.connected_zones -= B.zone
+
+			if(A.zone in B.zone.connected_zones)
+				if(B.zone.connected_zones[A.zone] > 1)
+					B.zone.connected_zones[A.zone]--
+				else
+					B.zone.connected_zones -= A.zone
+			if(A.zone.connected_zones && !A.zone.connected_zones.len)
+				A.zone.connected_zones = null
+			if(B.zone.connected_zones && !B.zone.connected_zones.len)
+				B.zone.connected_zones = null
+		. = ..()
+
+	proc/Cleanup()
+		if(A.zone == B.zone) del src
+		if(!A.zone || !B.zone) del src
\ No newline at end of file
diff --git a/code/ZAS/Creation.dm b/code/ZAS/Creation.dm
new file mode 100644
index 00000000000..5f256767fd3
--- /dev/null
+++ b/code/ZAS/Creation.dm
@@ -0,0 +1,60 @@
+zone
+	New(turf/start)
+		if(istype(start,/list))
+			contents = start
+		else
+			contents = FloodFill(start)
+		for(var/turf/T in contents)
+			T.zone = src
+			if(istype(T,/turf/space))
+				AddSpace(T)
+		air = new
+		var/members = contents.len
+		for(var/turf/simulated/T in contents)
+			air.oxygen += T.oxygen / members
+			air.nitrogen += T.nitrogen / members
+			air.carbon_dioxide += T.carbon_dioxide / members
+			air.toxins += T.toxins / members
+			air.temperature += T.temperature / members
+		air.group_multiplier = contents.len
+		zones += src
+	Del()
+		zones -= src
+		. = ..()
+
+proc/FloodFill(turf/start)
+	var
+		list
+			open = list(start)
+			closed = list()
+
+	while(open.len)
+		for(var/turf/T in open)
+			if(!T.HasDoor())
+				for(var/d in cardinal)
+					var/turf/O = get_step(T,d)
+					if(O.ZCanPass(T) && !(O in open) && !(O in closed))
+						open += O
+			open -= T
+			closed += T
+
+	return closed
+
+turf/proc/ZCanPass(turf/T)
+	if(istype(T,/turf/space)) return 0
+	else
+		if(T.blocks_air||blocks_air)
+			return 0
+
+		for(var/obj/obstacle in src)
+			if(istype(obstacle,/obj/machinery/door) && !istype(obstacle,/obj/machinery/door/window))
+				continue
+			if(!obstacle.CanPass(0, T, 0, 1))
+				return 0
+		for(var/obj/obstacle in T)
+			if(istype(obstacle,/obj/machinery/door) && !istype(obstacle,/obj/machinery/door/window))
+				continue
+			if(!obstacle.CanPass(0, src, 0, 1))
+				return 0
+
+		return 1
\ No newline at end of file
diff --git a/code/ZAS/Debug.dm b/code/ZAS/Debug.dm
new file mode 100644
index 00000000000..28fc3caef53
--- /dev/null
+++ b/code/ZAS/Debug.dm
@@ -0,0 +1,56 @@
+
+client/proc/Zone_Info(turf/T as null|turf)
+	set category = "Debug"
+	if(T)
+		if(T.zone)
+			T.zone.DebugDisplay(mob)
+		else
+			mob << "No zone here."
+	else
+		for(T in world)
+			T.overlays -= 'debug_space.dmi'
+			T.overlays -= 'debug_group.dmi'
+			T.overlays -= 'debug_connect.dmi'
+
+zone/proc
+	DebugDisplay(mob/M)
+		if(!dbg_output)
+			dbg_output = 1 //Don't want to be spammed when someone investigates a zone...
+			for(var/turf/T in contents)
+				T.overlays += 'debug_group.dmi'
+
+			for(var/turf/space/S in space_tiles)
+				S.overlays += 'debug_space.dmi'
+
+			M << "<u>Zone Air Contents</u>"
+			M << "Oxygen: [air.oxygen]"
+			M << "Nitrogen: [air.nitrogen]"
+			M << "Plasma: [air.toxins]"
+			M << "Carbon Dioxide: [air.carbon_dioxide]"
+			M << "Temperature: [air.temperature]"
+			M << "Heat Energy: [air.thermal_energy()]"
+			M << "Pressure: [air.return_pressure()]"
+			M << ""
+			M << "<u>Connections: [length(connections)]</u>"
+
+			for(var/connection/C in connections)
+				M << "[C.A] --> [C.B] [(C.indirect?"Indirect":"Direct")]"
+				C.A.overlays += 'debug_connect.dmi'
+				C.B.overlays += 'debug_connect.dmi'
+				spawn(50)
+					C.A.overlays -= 'debug_connect.dmi'
+					C.B.overlays -= 'debug_connect.dmi'
+
+		else
+			dbg_output = 0
+
+			for(var/turf/T in contents)
+				T.overlays -= 'debug_group.dmi'
+
+			for(var/turf/space/S in space_tiles)
+				S.overlays -= 'debug_space.dmi'
+		for(var/zone/Z in zones)
+			if(Z.air == air && Z != src)
+				var/turf/zloc = pick(Z.contents)
+				M << "\red Illegal air datum shared by: [zloc.loc.name]"
+
diff --git a/code/ZAS/Definition.dm b/code/ZAS/Definition.dm
new file mode 100644
index 00000000000..729d19841fc
--- /dev/null
+++ b/code/ZAS/Definition.dm
@@ -0,0 +1,34 @@
+turf/var/zone/zone
+
+var/list/zones = list()
+var/zone_controller/zone_master = new
+
+zone_controller
+	var
+		current_tick = 0
+	proc
+		start()
+			set background = 1
+			while(1)
+				current_tick++
+				for(var/zone/Z in zones)
+					if(Z.last_update < current_tick)
+						Z.process()
+						if(Z) Z.last_update = current_tick
+				for(var/obj/fire/F)
+					F.process()
+				//for(var/obj/z_hotspot/H in z_hotspots)
+				//	H.process()
+				sleep(max(5,vsc.zone_update_delay*tick_multiplier))
+
+zone
+	var
+		dbg_output = 0 //Enables debug output.
+		rebuild = 0 //If 1, zone will be rebuilt on next process.
+		datum/gas_mixture/air //The air contents of the zone.
+		list/contents //All the tiles that are contained in this zone.
+		list/connections // /connection objects which refer to connections with other zones, e.g. through a door.
+		list/connected_zones //Parallels connections, but lists zones to which this one is connected and the number
+							//of points they're connected at.
+		list/space_tiles // Any space tiles in this list will cause air to flow out.
+		last_update = 0
\ No newline at end of file
diff --git a/code/ZAS/Fire.dm b/code/ZAS/Fire.dm
new file mode 100644
index 00000000000..f265c45877a
--- /dev/null
+++ b/code/ZAS/Fire.dm
@@ -0,0 +1,338 @@
+vs_control/var/IgnitionLevel = 10 //Moles of oxygen+plasma - co2 needed to burn.
+
+#define OXYGEN
+atom/proc/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume)
+	return null
+
+turf/proc/hotspot_expose(exposed_temperature, exposed_volume, soh = 0)
+
+turf/simulated/hotspot_expose(exposed_temperature, exposed_volume, soh)
+	if(fire_protection) return
+	var/datum/gas_mixture/air_contents = return_air(1)
+	if(!air_contents)
+		return 0
+
+  /*if(active_hotspot)
+		if(soh)
+			if(air_contents.toxins > 0.5 && air_contents.oxygen > 0.5)
+				if(active_hotspot.temperature < exposed_temperature)
+					active_hotspot.temperature = exposed_temperature
+				if(active_hotspot.volume < exposed_volume)
+					active_hotspot.volume = exposed_volume
+		return 1*/
+	var/igniting = 0
+	if(locate(/obj/fire) in src)
+		return 1
+	var/datum/gas/volatile_fuel/fuel = locate() in air_contents.trace_gases
+	var/obj/liquid_fuel/liquid = locate() in src
+	var/fuel_level = 0
+	var/liquid_level = 0
+	if(fuel) fuel_level = fuel.moles
+	if(liquid) liquid_level = liquid.amount
+	var/total_fuel = air_contents.toxins + fuel_level + liquid_level
+	if((air_contents.oxygen + air_contents.toxins + fuel_level*1.5 + liquid_level*1.5) - (air_contents.carbon_dioxide*0.25) > vsc.IgnitionLevel && total_fuel > 0.5)
+		igniting = 1
+		if(air_contents.oxygen < 0.5)
+			return 0
+
+		if(parent&&parent.group_processing)
+			parent.suspend_group_processing()
+
+		if(! (locate(/obj/fire) in src))
+			var/obj/fire/F = new(src,1000)
+			F.temperature = exposed_temperature
+			F.volume = CELL_VOLUME
+
+		//active_hotspot.just_spawned = (current_cycle < air_master.current_cycle)
+		//remove just_spawned protection if no longer processing this cell
+
+	return igniting
+
+obj/effect/hotspot
+	//Icon for fire on turfs, also helps for nurturing small fires until they are full tile
+
+	anchored = 1
+
+	mouse_opacity = 0
+
+	//luminosity = 3
+
+	icon = 'fire.dmi'
+	icon_state = "1"
+
+	layer = TURF_LAYER
+
+	var
+		volume = 125
+		temperature = FIRE_MINIMUM_TEMPERATURE_TO_EXIST
+
+		just_spawned = 1
+
+		bypassing = 0
+
+obj/effect/hotspot/proc/perform_exposure()
+	var/turf/simulated/floor/location = loc
+	if(!istype(location))
+		return 0
+
+	if(volume > CELL_VOLUME*0.95)
+		bypassing = 1
+	else bypassing = 0
+
+	if(bypassing)
+		if(!just_spawned)
+			volume = location.air.fuel_burnt*FIRE_GROWTH_RATE
+			temperature = location.air.temperature
+	else
+		var/datum/gas_mixture/affected = location.air.remove_ratio(volume/location.air.volume)
+
+		affected.temperature = temperature
+
+		affected.react()
+
+		temperature = affected.temperature
+		volume = affected.fuel_burnt*FIRE_GROWTH_RATE
+
+		location.assume_air(affected)
+
+		for(var/atom/item in loc)
+			item.temperature_expose(null, temperature, volume)
+
+obj/effect/hotspot/process(turf/simulated/list/possible_spread)
+	if(just_spawned)
+		just_spawned = 0
+		return 0
+
+	var/turf/simulated/floor/location = loc
+	if(!istype(location))
+		del(src)
+
+	if((temperature < FIRE_MINIMUM_TEMPERATURE_TO_EXIST) || (volume <= 1))
+		del(src)
+
+	if(location.air.toxins < 0.5 || location.air.oxygen < 0.5)
+		del(src)
+
+
+	perform_exposure()
+
+	if(location.wet) location.wet = 0
+
+	if(bypassing)
+		icon_state = "3"
+		location.burn_tile()
+
+		//Possible spread due to radiated heat
+		if(location.air.temperature > FIRE_MINIMUM_TEMPERATURE_TO_SPREAD)
+			var/radiated_temperature = location.air.temperature*FIRE_SPREAD_RADIOSITY_SCALE
+
+			for(var/turf/simulated/possible_target in possible_spread)
+				if(!locate(/obj/effect/hotspot) in possible_target)
+					possible_target.hotspot_expose(radiated_temperature, CELL_VOLUME/4)
+
+	else
+		if(volume > CELL_VOLUME*0.4)
+			icon_state = "2"
+		else
+			icon_state = "1"
+
+	return 1
+
+obj/effect/hotspot/New()
+	..()
+	dir = pick(cardinal)
+	sd_SetLuminosity(3)
+
+obj/effect/hotspot/Del()
+	src.sd_SetLuminosity(0)
+	loc = null
+	..()
+
+var
+	fire_ratio_1 = 0.05
+
+obj
+	fire
+		//Icon for fire on turfs, also helps for nurturing small fires until they are full tile
+
+		anchored = 1
+		mouse_opacity = 0
+
+		//luminosity = 3
+
+		icon = 'fire.dmi'
+		icon_state = "1"
+
+		layer = TURF_LAYER
+
+		var
+			volume = CELL_VOLUME
+			temperature = FIRE_MINIMUM_TEMPERATURE_TO_EXIST
+			firelevel = 10000
+			archived_firelevel = 0
+
+		process()
+			if(firelevel > vsc.IgnitionLevel)
+				var/turf/simulated/floor/S = loc
+				if(!S.zone) del src
+				//src.temperature += (src.firelevel/FireTempDivider+FireOffset - src.temperature) / FireRate
+				if(istype(S,/turf/simulated/floor))
+					var
+						datum/gas_mixture/air_contents = S.return_air()
+						datum/gas/volatile_fuel/fuel = locate(/datum/gas/volatile_fuel/) in air_contents.trace_gases
+						fuel_level = 0
+						obj/liquid_fuel/liquid = locate() in S
+						liquid_level = 0
+
+					if(fuel) fuel_level = fuel.moles
+					if(liquid)
+						liquid_level = liquid.amount
+						if(liquid.amount <= 0)
+							del liquid
+							liquid_level = 0
+
+					firelevel = (air_contents.oxygen + air_contents.toxins + fuel_level*1.5 + liquid_level*1.5) - (air_contents.carbon_dioxide*0.25)
+
+					firelevel = min(firelevel,vsc.IgnitionLevel*5)
+
+					if(firelevel > vsc.IgnitionLevel * 1.5 && (air_contents.toxins || fuel_level || liquid_level))
+						for(var/direction in cardinal)
+							if(S.air_check_directions&direction) //Grab all valid bordering tiles
+								var/turf/simulated/enemy_tile = get_step(S, direction)
+								if(istype(enemy_tile))
+									if(enemy_tile.fire_protection)
+										firelevel -= vsc.IgnitionLevel
+										continue
+									if(!(locate(/obj/fire) in enemy_tile))
+										if( prob( firelevel/(vsc.IgnitionLevel*0.1) ) )
+											new/obj/fire(enemy_tile,firelevel)
+					//					else
+					//						world << "Spread Probability: [firelevel/(vsc.IgnitionLevel*0.1)]%."
+					//				else
+					//					world << "There's a fire there bitch."
+					//			else
+					//				world << "[enemy_tile] cannot be spread to."
+					//else
+					//	world << "Not enough firelevel to spread: [firelevel]/[vsc.IgnitionLevel*1.5]"
+
+					var/datum/gas_mixture/flow = air_contents.remove_ratio(0.5)
+					//n = PV/RT, taking the volume of a single tile from the gas.
+
+					if(flow)
+
+						if(flow.oxygen > 0.3 && (flow.toxins || fuel_level || liquid))
+
+							icon_state = "1"
+							if(firelevel > vsc.IgnitionLevel * 2)
+								icon_state = "2"
+							if(firelevel > vsc.IgnitionLevel * 3.5)
+								icon_state = "3"
+							flow.temperature = max(PLASMA_MINIMUM_BURN_TEMPERATURE+0.1,flow.temperature)
+							flow.zburn(liquid)
+
+						else
+							del src
+
+
+						S.assume_air(flow)
+					else
+						//world << "No air at all."
+						del src
+				else
+					del src
+			else
+				//world << "Insufficient fire level for ignition: [firelevel]/[IgnitionLevel]"
+				del src
+
+			for(var/mob/living/carbon/human/M in loc)
+				M.FireBurn(firelevel/(vsc.IgnitionLevel*10))
+
+
+		New(newLoc,fl)
+			..()
+			dir = pick(cardinal)
+			sd_SetLuminosity(3)
+			firelevel = fl
+			for(var/mob/living/carbon/human/M in loc)
+				M.FireBurn(firelevel/(vsc.IgnitionLevel*10))
+
+		Del()
+			if (istype(loc, /turf/simulated))
+				src.sd_SetLuminosity(0)
+
+				loc = null
+
+			..()
+
+obj/liquid_fuel
+	icon = 'effects.dmi'
+	icon_state = "slube"
+	layer = TURF_LAYER+0.2
+	anchored = 1
+	var/amount = 1
+
+	New(newLoc)
+		for(var/obj/liquid_fuel/other in newLoc)
+			if(other != src)
+				other.amount += src.amount
+				del src
+		. = ..()
+
+vs_control/var/switch_fire = 1
+
+turf/simulated/var/fire_protection = 0
+
+datum/gas_mixture/proc/zburn(obj/liquid_fuel/liquid)
+	if(vsc.switch_fire)
+		. = fire()
+		if(liquid && liquid.amount > 0)
+			oxygen -= fire_ratio_1
+			liquid.amount = max(liquid.amount-fire_ratio_1,0)
+			carbon_dioxide += fire_ratio_1
+			if(liquid.amount <= 0)
+				del liquid
+		return
+	if(temperature > PLASMA_MINIMUM_BURN_TEMPERATURE)
+		var
+			fuel_level = 0
+			datum/gas/volatile_fuel/fuel = locate() in trace_gases
+			liquid_level = 0
+		if(fuel) fuel_level = fuel.moles
+		if(liquid) liquid_level = liquid.amount
+		if(liquid && liquid_level <= 0)
+			del liquid
+			liquid_level = 0
+		if(oxygen > 0.3 && (toxins || fuel_level || liquid_level))
+			if(toxins && temperature < PLASMA_UPPER_TEMPERATURE)
+				temperature += (FIRE_PLASMA_ENERGY_RELEASED*fire_ratio_1) / heat_capacity()
+
+			if((fuel_level || liquid_level) && temperature < PLASMA_UPPER_TEMPERATURE)
+				temperature += (FIRE_CARBON_ENERGY_RELEASED*fire_ratio_1) / heat_capacity()
+
+			if(toxins > fire_ratio_1)
+				oxygen -= vsc.plc.OXY_TO_PLASMA*fire_ratio_1
+				toxins -= fire_ratio_1
+				carbon_dioxide += fire_ratio_1
+			else if(toxins)
+				oxygen -= toxins * vsc.plc.OXY_TO_PLASMA
+				carbon_dioxide += toxins
+				toxins = 0
+
+			if(fuel_level > fire_ratio_1/1.5)
+				oxygen -= vsc.plc.OXY_TO_PLASMA*fire_ratio_1
+				fuel.moles -= fire_ratio_1
+				carbon_dioxide += fire_ratio_1
+
+			else if(fuel_level)
+				oxygen -= fuel.moles * vsc.plc.OXY_TO_PLASMA
+				carbon_dioxide += fuel.moles
+				fuel.moles = 0
+
+			if(liquid_level > 0)
+				oxygen -= fire_ratio_1
+				liquid.amount = max(liquid.amount-fire_ratio_1,0)
+				carbon_dioxide += fire_ratio_1
+				if(liquid.amount <= 0)
+					del liquid
+			return 1
+	return 0
\ No newline at end of file
diff --git a/code/ZAS/Functions.dm b/code/ZAS/Functions.dm
new file mode 100644
index 00000000000..ab52842dd1f
--- /dev/null
+++ b/code/ZAS/Functions.dm
@@ -0,0 +1,159 @@
+zone
+	proc
+		AddTurf(turf/T)
+			if(T in contents) return
+			contents += T
+			air.group_multiplier++
+			T.zone = src
+		RemoveTurf(turf/T)
+			if(!(T in contents)) return
+			contents -= T
+			air.group_multiplier--
+			T.zone = null
+
+		DivideAir(ratio)
+			ratio = min(1,max(0,ratio))
+			air.oxygen *= ratio
+			air.oxygen = QUANTIZE(air.oxygen)
+			air.nitrogen *= ratio
+			air.nitrogen = QUANTIZE(air.nitrogen)
+			air.toxins *= ratio
+			air.toxins = QUANTIZE(air.toxins)
+			air.carbon_dioxide *= ratio
+			air.carbon_dioxide = QUANTIZE(air.carbon_dioxide)
+			if(air.trace_gases.len)
+				for(var/datum/gas/trace_gas in air.trace_gases)
+					trace_gas.moles *= ratio
+					trace_gas.moles = QUANTIZE(trace_gas.moles)
+			air.temperature = air.temperature*ratio + TCMB*(1-ratio)
+			air.temperature = QUANTIZE(air.temperature)
+
+		AddSpace(turf/space/S)
+			if(istype(S,/turf/space))
+				if(!space_tiles) space_tiles = list()
+				space_tiles += S
+		RemoveSpace(turf/space/S)
+			if(space_tiles)
+				space_tiles -= S
+				if(!space_tiles.len) space_tiles = null
+
+turf/proc/HasDoor(turf/O)
+	for(var/obj/machinery/door/D in src)
+		if(isnum(O) && O)
+			if(!D.density) continue
+		if(istype(D,/obj/machinery/door/window))
+			if(!O) continue
+			if(D.dir == get_dir(D,O)) return 1
+		else
+			return 1
+
+turf/proc/find_zone()
+	for(var/d in cardinal)
+		var/turf/T = get_step(src,d)
+		if(!T || !T.zone) continue
+		if(!zone)
+			zone = T.zone
+			zone.AddTurf(src)
+		else if(T.zone != zone)
+			ZConnect(src,T)
+
+proc
+	ZMerge(zone/A,zone/B)
+		//world << "Merge occured."
+		var
+			a_size = A.air.group_multiplier
+			b_size = B.air.group_multiplier
+			c_size = a_size + b_size
+			new_contents = A.contents + B.contents
+
+		A.air.group_multiplier = 1
+		B.air.group_multiplier = 1
+
+		A.air.remove_ratio(a_size/c_size)
+		B.air.remove_ratio(b_size/c_size)
+		A.air.merge(B.air)
+		A.air.group_multiplier = c_size
+
+		for(var/connection/C in B.connections)
+			if((C.A in new_contents) && (C.B in new_contents))
+				del C
+				continue
+			A.connections += C
+		A.space_tiles += B.space_tiles
+		A.contents = new_contents
+		for(var/turf/T in B.contents)
+			T.zone = A
+		del B
+
+	ZConnect(turf/A,turf/B)
+		if(istype(B,/turf/space))
+			if(A.zone)
+				A.zone.AddSpace(B)
+				//world << "Space added."
+			return
+		if(istype(A,/turf/space))
+			if(B.zone)
+				B.zone.AddSpace(B)
+				//world << "Space added."
+			return
+		if(!A.zone || !B.zone) return
+		if(A.zone == B.zone) return
+		if(!A.CanPass(0,B,0,0)) return
+		for(var/connection/C in A.zone.connections)
+			if((C.A == A && C.B == B) || (C.A == B && C.B == A))
+				return
+		var/connection/C = new(A,B)
+		if(A.HasDoor(B) || B.HasDoor(A)) C.indirect = 1
+		//world << "Connection Formed: [A] --> [B] [(C.indirect?"Indirect":"Direct")]"
+		//A.overlays += 'zone_connection_A.dmi'
+		//B.overlays += 'zone_connection_B.dmi'
+		//spawn(10)
+		//	A.overlays -= 'zone_connection_A.dmi'
+		//	B.overlays -= 'zone_connection_B.dmi'
+
+
+	ZDisconnect(turf/A,turf/B)
+		if(A.zone && B.zone)
+			if(A.zone != B.zone)
+				for(var/connection/C in A.zone.connections)
+					if((C.A == A && C.B == B) || (C.A == B && C.B == A))
+						//world << "Connection Dissolved: [A] -/-> [B] [(C.indirect?"Indirect":"Direct")]"
+						/*A.overlays += 'zone_connection_A.dmi'
+						B.overlays += 'zone_connection_B.dmi'
+						spawn(10)
+							A.overlays -= 'zone_connection_A.dmi'
+							B.overlays -= 'zone_connection_B.dmi'*/
+						del C
+			/*else
+				if(A == B) return
+				if(A.CanPass(0,B,0,0)) return
+				if(A.HasDoor(B) || B.HasDoor(A)) return
+				var/zone/oldzone = A.zone
+				var/list/test = FloodFill(A)
+				if(B in test) return
+				else
+					var/zone/Z = new(test,oldzone.air)
+					for(var/connection/C in oldzone.connections)
+						if((A in Z.contents) || (B in Z.contents))
+							if(!Z.connections) Z.connections = list()
+							Z.connections += C
+					var/datum/gas_mixture/Y_Air = new
+					Y_Air.copy_from(oldzone.air)
+					var/zone/Y = new(B,Y_Air)
+					for(var/connection/C in oldzone.connections)
+						if((A in Y.contents) || (B in Y.contents))
+							if(!Y.connections) Y.connections = list()
+							Y.connections += C
+					oldzone.air = null
+					del oldzone
+					world << "Zone Split: [A] / [B]"
+					A.overlays += 'zone_connection_A.dmi'
+					B.overlays += 'zone_connection_B.dmi'
+					spawn(10)
+						A.overlays -= 'zone_connection_A.dmi'
+						B.overlays -= 'zone_connection_B.dmi'*/
+		else
+			if(istype(A,/turf/space) && B.zone)
+				B.zone.RemoveSpace(A)
+			else if(istype(B,/turf/space) && A.zone)
+				A.zone.RemoveSpace(B)
\ No newline at end of file
diff --git a/code/ZAS/Plasma.dm b/code/ZAS/Plasma.dm
new file mode 100644
index 00000000000..df25a974578
--- /dev/null
+++ b/code/ZAS/Plasma.dm
@@ -0,0 +1,252 @@
+pl_control/var
+	PLASMA_DMG = 3
+	PLASMA_DMG_NAME = "Plasma Damage Multiplier"
+	PLASMA_DMG_DESC = "Multiplier on how much damage inhaling plasma can do."
+
+	OXY_TO_PLASMA = 1
+	OXY_TO_PLASMA_NAME = "O2/Plasma Ratio"
+	OXY_TO_PLASMA_DESC = "Multiplier for the ratio of oxygen to plasma required in fires."
+
+	CLOTH_CONTAMINATION = 1 //If this is on, plasma does damage by getting into cloth.
+	CLOTH_CONTAMINATION_NAME = "Plasma - Cloth Contamination"
+	CLOTH_CONTAMINATION_RANDOM = 60
+	CLOTH_CONTAMINATION_METHOD = "Toggle"
+	CLOTH_CONTAMINATION_DESC = "If set to nonzero, plasma will contaminate cloth items (uniforms, backpacks, etc.)\
+	and cause a small amount of damage over time to anyone carrying or wearing them. Contamination can be detected\
+	with a Health Analyzer, and washed off in the washer."
+
+	ALL_ITEM_CONTAMINATION = 0 //If this is on, any item can be contaminated, so suits and tools must be discarded or
+										  //decontaminated.
+	ALL_ITEM_CONTAMINATION_NAME = "Plasma - Full Contamination"
+	ALL_ITEM_CONTAMINATION_RANDOM = 10
+	ALL_ITEM_CONTAMINATION_METHOD = "Toggle"
+	ALL_ITEM_CONTAMINATION_DESC = "Like Cloth Contamination, but all item types are susceptible."
+
+	PLASMAGUARD_ONLY = 0
+	PLASMAGUARD_ONLY_NAME = "Plasma - Biosuits/Spacesuits Only"
+	PLASMAGUARD_ONLY_RANDOM = 20
+	PLASMAGUARD_ONLY_METHOD = "Toggle"
+	PLASMAGUARD_ONLY_DESC = "If on, any suits that are not biosuits or space suits will not protect against contamination."
+
+	//CANISTER_CORROSION = 0         //If this is on, plasma must be stored in orange tanks and canisters,
+	//CANISTER_CORROSION_RANDOM = 20 //or it will corrode the tank.
+	//CANISTER_CORROSION_METHOD = "Toggle"
+
+	GENETIC_CORRUPTION = 0 //Chance of genetic corruption as well as toxic damage, X in 10,000.
+	GENETIC_CORRUPTION_NAME = "Plasma - Genetic Corruption"
+	GENETIC_CORRUPTION_RANDOM = "PROB10/3d6"
+	GENETIC_CORRUPTION_METHOD = "Numeric"
+	GENETIC_CORRUPTION_DESC = "When set to a probability in 1000, any humans in plasma will have this chance to develop a random mutation."
+
+	SKIN_BURNS = 1       //Plasma has an effect similar to mustard gas on the un-suited.
+	SKIN_BURNS_NAME = "Plasma - Skin Burns"
+	SKIN_BURNS_RANDOM = 10
+	SKIN_BURNS_METHOD = "Toggle"
+	SKIN_BURNS_DESC = "When toggled, humans with exposed skin will suffer burns (similar to mustard gas) in plasma."
+
+	//PLASMA_INJECTS_TOXINS = 0         //Plasma damage injects the toxins chemical to do damage over time.
+	//PLASMA_INJECTS_TOXINS_RANDOM = 30
+	//PLASMA_INJECTS_TOXINS_METHOD = "Toggle"
+
+	EYE_BURNS = 0 //Plasma burns the eyes of anyone not wearing eye protection.
+	EYE_BURNS_NAME = "Plasma - Eye Burns"
+	EYE_BURNS_RANDOM = 30
+	EYE_BURNS_METHOD = "Toggle"
+	EYE_BURNS_DESC = "When toggled, humans without masks that cover the eyes will suffer temporary blurriness and sight loss,\
+	and may need glasses to see again if exposed for long durations."
+
+	//N2O_REACTION = 0 //Plasma can react with N2O, making sparks and starting a fire if levels are high.
+	//N2O_REACTION_RANDOM = 5
+
+	//PLASMA_COLOR = "onturf" //Plasma can change colors yaaaay!
+	//PLASMA_COLOR_RANDOM = "PICKonturf,onturf"
+
+	//PLASMA_DMG_OFFSET = 1
+	//PLASMA_DMG_OFFSET_RANDOM = "1d5"
+	//PLASMA_DMG_QUOTIENT = 10
+	//PLASMA_DMG_QUOTIENT_RANDOM = "1d10+4"
+
+	CONTAMINATION_LOSS = 0.1
+	_NAME = "Plasma - Contamination Damage"
+	CONTAMINATION_LOSS_DESC = "A number representing the damage done per life cycle by contaminated items."
+
+	PLASMA_HALLUCINATION = 1
+	PLASMA_HALLUCINATION_NAME = "Plasma - Hallucination"
+	PLASMA_HALLUCINATION_METHOD = "Toggle"
+	PLASMA_HALLUCINATION_DESC = "If toggled, uses the remnants of the hallucination code to induce visions in those\
+	who breathe plasma."
+	N2O_HALLUCINATION = 1
+	N2O_HALLUCINATION_NAME = "Nitrous Oxide - Hallucination"
+	N2O_HALLUCINATION_METHOD = "Toggle"
+	N2O_HALLUCINATION_DESC = "If toggled, uses the remnants of the hallucination code to induce visions in those\
+	who breathe N2O."
+	//CONTAMINATION_LOSS_RANDOM = "5d5"
+//Plasma has a chance to be a different color.
+
+obj/var/contaminated = 0
+
+obj/item/proc
+	can_contaminate()
+		if(flags & PLASMAGUARD) return 0
+		if((flags & SUITSPACE) && !vsc.plc.PLASMAGUARD_ONLY) return 1
+		if(vsc.plc.ALL_ITEM_CONTAMINATION) return 1
+		else if(istype(src,/obj/item/clothing)) return 1
+		else if(istype(src,/obj/item/weapon/storage/backpack)) return 1
+
+/mob/living/carbon/human/proc/contaminate()
+	if(!pl_suit_protected())
+		suit_contamination()
+	else if(vsc.plc.PLASMAGUARD_ONLY)
+		if(!wear_suit.flags & PLASMAGUARD) wear_suit.contaminated = 1
+
+
+
+	if(!pl_head_protected())
+		if(wear_mask) wear_mask.contaminated = 1
+		if(prob(1)) suit_contamination() //Plasma can sometimes get through such an open suit.
+	else if(vsc.plc.PLASMAGUARD_ONLY)
+		if(!head.flags & PLASMAGUARD) head.contaminated = 1
+
+	if(istype(back,/obj/item/weapon/storage/backpack) || vsc.plc.ALL_ITEM_CONTAMINATION)
+		back.contaminated = 1
+
+	if(l_hand)
+		if(l_hand.can_contaminate()) l_hand.contaminated = 1
+	if(r_hand)
+		if(r_hand.can_contaminate()) r_hand.contaminated = 1
+	if(belt)
+		if(belt.can_contaminate()) belt.contaminated = 1
+	if(wear_id && !pl_suit_protected())
+		if(wear_id.can_contaminate()) wear_id.contaminated = 1
+	if(l_ear && !pl_head_protected())
+		if(l_ear.can_contaminate()) l_ear.contaminated = 1
+	if(r_ear && !pl_head_protected())
+		if(r_ear.can_contaminate()) r_ear.contaminated = 1
+
+/mob/living/carbon/human/proc/pl_effects()
+	if(stat >= 2)
+		return
+	if(vsc.plc.SKIN_BURNS)
+		if(!pl_head_protected() || !pl_suit_protected())
+			burn_skin(0.75)
+			if (coughedtime != 1)
+				coughedtime = 1
+				emote("gasp")
+				spawn (20)
+					coughedtime = 0
+			updatehealth()
+	if(vsc.plc.EYE_BURNS && !pl_head_protected())
+		if(!wear_mask)
+			if(prob(20)) usr << "\red Your eyes burn!"
+			eye_stat += 2.5
+			eye_blurry += 1.5
+			if (eye_stat >= 20 && !(disabilities & 1))
+				src << "\red Your eyes start to burn badly!"
+				disabilities |= 1
+			if (prob(max(0,eye_stat - 20) + 1))
+				src << "\red You are blinded!"
+				eye_blind += 20
+				eye_stat = max(eye_stat-25,0)
+		else
+			if(!(wear_mask.flags & MASKCOVERSEYES))
+				if(prob(20)) usr << "\red Your eyes burn!"
+				eye_stat += 2.5
+				eye_blurry = min(eye_blurry+1.5,50)
+				if (eye_stat >= 20 && !(disabilities & 1))
+					src << "\red Your eyes start to burn badly!"
+					disabilities |= 1
+				if (prob(max(0,eye_stat - 20) + 1) &&!eye_blind)
+					src << "\red You are blinded!"
+					eye_blind += 20
+					eye_stat = 0
+	if(vsc.plc.GENETIC_CORRUPTION)
+		if(rand(1,1000) < vsc.plc.GENETIC_CORRUPTION)
+			randmutb(src)
+			src << "\red High levels of toxins cause you to spontaneously mutate."
+			domutcheck(src,null)
+
+/mob/living/carbon/human/proc/FireBurn(mx as num)
+	//NO! NOT INTO THE PIT! IT BURRRRRNS!
+	mx *= vsc.BURN_DMG
+
+	var
+		head_exposure = 1
+		chest_exposure = 1
+		groin_exposure = 1
+		legs_exposure = 1
+		feet_exposure = 1
+		arms_exposure = 1
+		hands_exposure = 1
+	for(var/obj/item/clothing/C in src)
+		if(l_hand == C || r_hand == C) continue
+		if(C.body_parts_covered & HEAD)
+			head_exposure *= C.heat_transfer_coefficient
+		if(C.body_parts_covered & UPPER_TORSO)
+			chest_exposure *= C.heat_transfer_coefficient
+		if(C.body_parts_covered & LOWER_TORSO)
+			groin_exposure *= C.heat_transfer_coefficient
+		if(C.body_parts_covered & LEGS)
+			legs_exposure *= C.heat_transfer_coefficient
+		if(C.body_parts_covered & FEET)
+			feet_exposure *= C.heat_transfer_coefficient
+		if(C.body_parts_covered & ARMS)
+			arms_exposure *= C.heat_transfer_coefficient
+		if(C.body_parts_covered & HANDS)
+			arms_exposure *= C.heat_transfer_coefficient
+
+	mx *= 10
+
+	apply_damage("head", 0, 2.5*mx*head_exposure)
+	apply_damage("chest", 0, 2.5*mx*chest_exposure)
+	apply_damage("groin", 0, 2.0*mx*groin_exposure)
+	apply_damage("l_leg", 0, 0.6*mx*legs_exposure)
+	apply_damage("r_leg", 0, 0.6*mx*legs_exposure)
+	apply_damage("l_arm", 0, 0.4*mx*arms_exposure)
+	apply_damage("r_arm", 0, 0.4*mx*arms_exposure)
+	apply_damage("l_foot", 0, 0.25*mx*feet_exposure)
+	apply_damage("r_foot", 0, 0.25*mx*feet_exposure)
+	apply_damage("l_hand", 0, 0.25*mx*hands_exposure)
+	apply_damage("r_hand", 0, 0.25*mx*hands_exposure)
+
+/mob/living/carbon/human/proc/suit_interior()
+	. = list()
+	if(!pl_suit_protected())
+		for(var/obj/item/I in src)
+			. += I
+		return .
+	. += wear_mask
+	. += w_uniform
+	. += shoes
+	. += gloves
+	if(!pl_head_protected())
+		. += head
+
+/mob/living/carbon/human/proc/pl_head_protected()
+	if(head)
+		if(head.flags & PLASMAGUARD || head.flags & HEADSPACE) return 1
+	return 0
+
+/mob/living/carbon/human/proc/pl_suit_protected()
+	if(wear_suit)
+		if(wear_suit.flags & PLASMAGUARD || wear_suit.flags & SUITSPACE) return 1
+	return 0
+
+/mob/living/carbon/human/proc/suit_contamination()
+	if(vsc.plc.ALL_ITEM_CONTAMINATION)
+		for(var/obj/item/I in src)
+			I.contaminated = 1
+	else
+		if(wear_suit) wear_suit.contaminated = 1
+		if(w_uniform) w_uniform.contaminated = 1
+		if(shoes) shoes.contaminated = 1
+		if(gloves) gloves.contaminated = 1
+		if(wear_mask) wear_mask.contaminated = 1
+
+
+turf/Entered(obj/item/I)
+	. = ..()
+	if(istype(I))
+		var/datum/gas_mixture/env = return_air(1)
+		if(env.toxins > 0.35)
+			if(I.can_contaminate())
+				I.contaminated = 1
\ No newline at end of file
diff --git a/code/ZAS/Processing.dm b/code/ZAS/Processing.dm
new file mode 100644
index 00000000000..e1015a238f0
--- /dev/null
+++ b/code/ZAS/Processing.dm
@@ -0,0 +1,103 @@
+#define QUANTIZE(variable)		(round(variable,0.0001))
+var/explosion_halt = 0
+zone
+	proc/process()
+		if(rebuild)
+			if(!contents) del src
+			var
+				turf/sample = pick(contents)
+				list/new_contents = FloodFill(sample)
+				problem = 0
+			for(var/turf/T in contents)
+				if(!(T in new_contents))
+					problem = 1
+
+			if(problem)
+				var/list/rebuild_turfs = list()
+				for(var/turf/T in contents - new_contents)
+					contents -= T
+					rebuild_turfs += T
+					T.zone = null
+				for(var/turf/T in rebuild_turfs)
+					if(!T.zone)
+						var/zone/Z = new/zone(T)
+						Z.air.copy_from(air)
+			rebuild = 0
+
+		var/total_space = 0
+		var/turf/space/space
+
+		if(length(connected_zones))
+			for(var/zone/Z in connected_zones)
+				total_space += length(Z.space_tiles)
+				if(length(Z.space_tiles))
+					space = Z.space_tiles[1]
+
+		if(space_tiles)
+			for(var/T in space_tiles)
+				if(!istype(T,/turf/space)) space_tiles -= T
+			total_space += length(space_tiles)
+			if(length(space_tiles))
+				space = space_tiles[1]
+
+		if(total_space && space)
+			var/old_pressure = air.return_pressure()
+			air.temperature_mimic(space,OPEN_HEAT_TRANSFER_COEFFICIENT,total_space)
+			air.remove(MOLES_CELLSTANDARD * (air.group_multiplier/40) * total_space)
+			if(dbg_output) world << "Space removed [MOLES_CELLSTANDARD*(air.group_multiplier/40)*total_space] moles of air."
+			var/p_diff = old_pressure - air.return_pressure()
+			if(p_diff > vsc.AF_TINY_MOVEMENT_THRESHOLD) AirflowSpace(src,p_diff)
+
+		air.react(null,0)
+		var/check = air.check_tile_graphic()
+		for(var/turf/T in contents)
+			if(T.zone && T.zone != src)
+				RemoveTurf(T)
+				if(dbg_output) world << "Removed invalid turf."
+			else if(!T.zone)
+				T.zone = src
+
+			if(istype(T,/turf/simulated))
+				var/turf/simulated/S = T
+				if(S.fire_protection) S.fire_protection--
+				if(check)
+					if(S.HasDoor(1))
+						S.update_visuals()
+					else
+						S.update_visuals(air)
+
+				if(air.temperature > FIRE_MINIMUM_TEMPERATURE_TO_EXIST)
+					for(var/atom/movable/item in S)
+						item.temperature_expose(air, air.temperature, CELL_VOLUME)
+					S.temperature_expose(air, air.temperature, CELL_VOLUME)
+		air.graphic_archived = air.graphic
+
+		air.temperature = max(TCMB,air.temperature)
+
+		if(length(connections))
+			for(var/connection/C in connections)
+				C.Cleanup()
+				if(C && !C.indirect)
+					if(C.A.zone.air.compare(C.B.zone.air))
+						ZMerge(C.A.zone,C.B.zone)
+			for(var/zone/Z in connected_zones)
+				var/p_diff = (air.return_pressure()-Z.air.return_pressure())*connected_zones[Z]*(vsc.zone_share_percent/100)
+				if(p_diff > vsc.AF_TINY_MOVEMENT_THRESHOLD) Airflow(src,Z,p_diff)
+				air.share_ratio(Z.air,connected_zones[Z]*(vsc.zone_share_percent/100))
+
+
+zone/proc
+	connected_zones()
+		. = list()
+		for(var/connection/C in connections)
+			var/zone/Z
+			if(C.A.zone == src)
+				Z = C.B.zone
+			else
+				Z = C.A.zone
+
+			if(Z in .)
+				.[Z]++
+			else
+				. += Z
+				.[Z] = 1
\ No newline at end of file
diff --git a/code/ZAS/Variable Settings.dm b/code/ZAS/Variable Settings.dm
new file mode 100644
index 00000000000..188f885ae9b
--- /dev/null
+++ b/code/ZAS/Variable Settings.dm	
@@ -0,0 +1,285 @@
+var/global/vs_control/vsc = new
+vs_control
+	var
+		list/settings = list()
+		list/bitflags = list("1","2","4","8","16","32","64","128","256","512","1024")
+		pl_control/plc = new()
+		/*RPREV_REQUIRE_HEADS_ALIVE = 0
+		RPREV_REQUIRE_HEADS_ALIVE_DESC = "Require the heads to be captured alive in RP Rev, rather than either dead or captured."
+		RPREV_REQUIRE_REVS_ALIVE = 0
+		RPREV_REQUIRE_REVS_ALIVE_DESC = "Require the rev leaders to be captured alive in RP Rev, rather than either dead or captured."*/
+	New()
+		. = ..()
+		settings = vars.Copy()
+
+		var/datum/D = new() //Ensure only unique vars are put through by making a datum and removing all common vars.
+		for(var/V in D.vars)
+			settings -= V
+
+		for(var/V in settings)
+			if(findtextEx(V,"_RANDOM") || findtextEx(V,"_DESC") || findtextEx(V,"_METHOD"))
+				settings -= V
+
+		settings -= "settings"
+		settings -= "bitflags"
+		settings -= "plc"
+
+	proc/ChangeSettingsDialog(mob/user,list/L)
+		//var/which = input(user,"Choose a setting:") in L
+		var/dat = ""
+		for(var/ch in L)
+			if(findtextEx(ch,"_RANDOM") || findtextEx(ch,"_DESC") || findtextEx(ch,"_METHOD") || findtextEx(ch,"_NAME")) continue
+			var/vw
+			var/vw_desc = "No Description."
+			var/vw_name = ch
+			if(ch in plc.settings)
+				vw = plc.vars[ch]
+				if("[ch]_DESC" in plc.vars) vw_desc = plc.vars["[ch]_DESC"]
+				if("[ch]_NAME" in plc.vars) vw_name = plc.vars["[ch]_NAME"]
+			else
+				vw = vars[ch]
+				if("[ch]_DESC" in vars) vw_desc = vars["[ch]_DESC"]
+				if("[ch]_NAME" in plc.vars) vw_name = vars["[ch]_NAME"]
+			dat += "<b>[vw_name] = [vw]</b> <A href='?src=\ref[src];changevar=[ch]'>\[Change\]</A><br>"
+			dat += "<i>[vw_desc]</i><br><br>"
+		user << browse(dat,"window=settings")
+	Topic(href,href_list)
+		if("changevar" in href_list)
+			ChangeSetting(usr,href_list["changevar"])
+	proc/ChangeSetting(mob/user,ch)
+		var/vw
+		var/how = "Text"
+		if(ch in plc.settings)
+			vw = plc.vars[ch]
+			if("[ch]_METHOD" in vars)
+				how = plc.vars["[ch]_METHOD"]
+			else
+				if(isnum(vw))
+					how = "Numeric"
+				else
+					how = "Text"
+		else
+			vw = vars[ch]
+			if("[ch]_METHOD" in vars)
+				how = vars["[ch]_METHOD"]
+			else
+				if(isnum(vw))
+					how = "Numeric"
+				else
+					how = "Text"
+		var/newvar = vw
+		switch(how)
+			if("Numeric")
+				newvar = input(user,"Enter a number:","Settings",newvar) as num
+			if("Bit Flag")
+				var/flag = input(user,"Toggle which bit?","Settings") in bitflags
+				flag = text2num(flag)
+				if(newvar & flag)
+					newvar &= ~flag
+				else
+					newvar |= flag
+			if("Toggle")
+				newvar = !newvar
+			if("Text")
+				newvar = input(user,"Enter a string:","Settings",newvar) as text
+			if("Long Text")
+				newvar = input(user,"Enter text:","Settings",newvar) as message
+		vw = newvar
+		if(ch in plc.settings)
+			plc.vars[ch] = vw
+		else
+			vars[ch] = vw
+		if(how == "Toggle")
+			newvar = (newvar?"ON":"OFF")
+		world << "\blue <b>[key_name(user)] changed the setting [ch] to [newvar].</b>"
+		//user << "[which] has been changed to [newvar]."
+		if(ch in plc.settings)
+			ChangeSettingsDialog(user,plc.settings)
+		else
+			ChangeSettingsDialog(user,settings)
+	proc/RandomizeWithProbability()
+		for(var/V in settings)
+			var/newvalue
+			if("[V]_RANDOM" in vars)
+				if(isnum(vars["[V]_RANDOM"]))
+					newvalue = prob(vars["[V]_RANDOM"])
+				else if(istext(vars["[V]_RANDOM"]))
+					newvalue = roll(vars["[V]_RANDOM"])
+				else
+					newvalue = vars[V]
+			V = newvalue
+
+	proc/ChangePlasma()
+		for(var/V in plc.settings)
+			plc.Randomize(V)
+		////world << "Plasma randomized."
+
+	proc/SetDefault(def)
+		switch(def)
+			if("Original")
+				plc.CLOTH_CONTAMINATION = 0 //If this is on, plasma does damage by getting into cloth.
+
+				plc.ALL_ITEM_CONTAMINATION = 0 //If this is on, any item can be contaminated, so suits and tools must be discarded or
+
+				plc.PLASMAGUARD_ONLY = 0
+
+				//plc.CANISTER_CORROSION = 0         //If this is on, plasma must be stored in orange tanks and canisters,
+
+				plc.GENETIC_CORRUPTION = 0 //Chance of genetic corruption as well as toxic damage, X in 1000.
+
+				plc.SKIN_BURNS = 0       //Plasma has an effect similar to mustard gas on the un-suited.
+
+				//plc.PLASMA_INJECTS_TOXINS = 0         //Plasma damage injects the toxins chemical to do damage over time.
+
+				plc.EYE_BURNS = 0 //Plasma burns the eyes of anyone not wearing eye protection.
+
+				//plc.N2O_REACTION = 0 //Plasma can react with N2O, making sparks and starting a fire if levels are high.
+
+				//plc.PLASMA_COLOR = "onturf" //Plasma can change colors yaaaay!
+
+				//plc.PLASMA_DMG_OFFSET = 1
+				//plc.PLASMA_DMG_QUOTIENT = 10
+
+				plc.CONTAMINATION_LOSS = 0
+			if("Hazard-Low")
+				plc.CLOTH_CONTAMINATION = 1 //If this is on, plasma does damage by getting into cloth.
+
+				plc.ALL_ITEM_CONTAMINATION = 0 //If this is on, any item can be contaminated, so suits and tools must be discarded or
+
+				plc.PLASMAGUARD_ONLY = 0
+
+			//	plc.CANISTER_CORROSION = 0         //If this is on, plasma must be stored in orange tanks and canisters,
+
+				plc.GENETIC_CORRUPTION = 0 //Chance of genetic corruption as well as toxic damage, X in 1000.
+
+				plc.SKIN_BURNS = 0       //Plasma has an effect similar to mustard gas on the un-suited.
+
+			//	plc.PLASMA_INJECTS_TOXINS = 0         //Plasma damage injects the toxins chemical to do damage over time.
+
+				plc.EYE_BURNS = 0 //Plasma burns the eyes of anyone not wearing eye protection.
+
+			//	plc.N2O_REACTION = 0 //Plasma can react with N2O, making sparks and starting a fire if levels are high.
+
+			//	plc.PLASMA_COLOR = "onturf" //RBPYB
+
+				//if(prob(20))
+				//	plc.PLASMA_COLOR = pick("red","yellow","blue","purple")
+
+				//plc.PLASMA_DMG_OFFSET = 1.5
+				//plc.PLASMA_DMG_QUOTIENT = 8
+
+				plc.CONTAMINATION_LOSS = 0.01
+
+				var/s = pick(plc.settings)
+				plc.Randomize(s)
+
+			if("Hazard-High")
+				plc.CLOTH_CONTAMINATION = 1 //If this is on, plasma does damage by getting into cloth.
+
+				plc.ALL_ITEM_CONTAMINATION = 0 //If this is on, any item can be contaminated, so suits and tools must be discarded or
+
+				plc.PLASMAGUARD_ONLY = 0
+
+			//	plc.CANISTER_CORROSION = 1         //If this is on, plasma must be stored in orange tanks and canisters,
+
+				plc.GENETIC_CORRUPTION = 0 //Chance of genetic corruption as well as toxic damage, X in 1000.
+
+				plc.SKIN_BURNS = 0       //Plasma has an effect similar to mustard gas on the un-suited.
+
+			//	plc.PLASMA_INJECTS_TOXINS = 0         //Plasma damage injects the toxins chemical to do damage over time.
+
+				plc.EYE_BURNS = 0 //Plasma burns the eyes of anyone not wearing eye protection.
+
+			//	plc.N2O_REACTION = 0 //Plasma can react with N2O, making sparks and starting a fire if levels are high.
+
+			//	plc.PLASMA_COLOR = "onturf"//pick("red","yellow","blue","purple") //RBPYB
+
+				//plc.PLASMA_DMG_OFFSET = 3
+				//plc.PLASMA_DMG_QUOTIENT = 5
+
+				plc.CONTAMINATION_LOSS = 0.05
+
+				for(var/i = rand(3,5),i>0,i--)
+					var/s = pick(plc.settings)
+					plc.Randomize(s)
+
+			if("Everything")
+				plc.CLOTH_CONTAMINATION = 1 //If this is on, plasma does damage by getting into cloth.
+
+				plc.ALL_ITEM_CONTAMINATION = 1 //If this is on, any item can be contaminated, so suits and tools must be discarded or ELSE
+
+				plc.PLASMAGUARD_ONLY = 1
+
+			//	plc.CANISTER_CORROSION = 1         //If this is on, plasma must be stored in orange tanks and canisters,
+
+				plc.GENETIC_CORRUPTION = 5 //Chance of genetic corruption as well as toxic damage, X in 1000.
+
+				plc.SKIN_BURNS = 1       //Plasma has an effect similar to mustard gas on the un-suited.
+
+			//	plc.PLASMA_INJECTS_TOXINS = 1         //Plasma damage injects the toxins chemical to do damage over time.
+
+				plc.EYE_BURNS = 1 //Plasma burns the eyes of anyone not wearing eye protection.
+
+			//	plc.N2O_REACTION = 1 //Plasma can react with N2O, making sparks and starting a fire if levels are high.
+
+			//	plc.PLASMA_COLOR = "onturf" //RBPYB
+
+				//plc.PLASMA_DMG_OFFSET = 3
+				//plc.PLASMA_DMG_QUOTIENT = 5
+
+				plc.CONTAMINATION_LOSS = 0.02
+		/////world << "Plasma color updated."
+
+pl_control
+	var/list/settings = list()
+	New()
+		. = ..()
+		settings = vars.Copy()
+
+		var/datum/D = new() //Ensure only unique vars are put through by making a datum and removing all common vars.
+		for(var/V in D.vars)
+			settings -= V
+
+		for(var/V in settings)
+			if(findtextEx(V,"_RANDOM") || findtextEx(V,"_DESC"))
+				settings -= V
+
+		settings -= "settings"
+	proc/Randomize(V)
+		//world << "Randomizing [V]"
+		var/newvalue
+		if("[V]_RANDOM" in vars)
+			if(isnum(vars["[V]_RANDOM"]))
+				newvalue = prob(vars["[V]_RANDOM"])
+				if(newvalue)
+					//world << "Probability [vars["[V]_RANDOM"]]%: Success."
+				else
+					//world << "Probability [vars["[V]_RANDOM"]]%: Failure."
+			else if(istext(vars["[V]_RANDOM"]))
+				var/txt = vars["[V]_RANDOM"]
+				if(findtextEx(txt,"PROB"))
+					//world << "Probability/Roll Combo \..."
+					txt = dd_text2list(txt,"/")
+					txt[1] = dd_replacetext(txt[1],"PROB","")
+					var/p = text2num(txt[1])
+					var/r = txt[2]
+					//world << "Prob:[p]% Roll:[r]"
+					if(prob(p))
+						newvalue = roll(r)
+						//world << "Success. New value: [newvalue]"
+					else
+						newvalue = vars[V]
+						//world << "Probability check failed."
+				else if(findtextEx(txt,"PICK"))
+					txt = dd_replacetext(txt,"PICK","")
+					//world << "Pick: [txt]"
+					txt = dd_text2list(txt,",")
+					newvalue = pick(txt)
+					//world << "Picked: [newvalue]"
+				else
+					newvalue = roll(txt)
+					//world << "Roll: [txt] - [newvalue]"
+			else
+				newvalue = vars[V]
+			vars[V] = newvalue
+				////world << "Plasma color updated."
\ No newline at end of file
diff --git a/icons/misc/debug_connect.dmi b/icons/misc/debug_connect.dmi
new file mode 100644
index 00000000000..0c96c86daa2
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diff --git a/icons/misc/debug_group.dmi b/icons/misc/debug_group.dmi
new file mode 100644
index 00000000000..2c87c66010c
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diff --git a/icons/misc/debug_space.dmi b/icons/misc/debug_space.dmi
new file mode 100644
index 00000000000..44d01dfe766
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