hoo boy

code/__DEFINES/atmospherics.dm

@@ -68,6 +68,12 @@
 
 #define TEMPERATURE_DAMAGE_COEFFICIENT		1.5		//This is used in handle_temperature_damage() for humans, and in reagents that affect body temperature. Temperature damage is multiplied by this amount.
 
+#define SYNTH_PASSIVE_HEAT_GAIN 10						//Degrees C per handle_environment() Synths passively heat up. Mitigated by cooling efficiency. Can lead to overheating if not managed.
+#define SYNTH_HEAT_EFFICIENCY_COEFF 0.005				//How quick the difference between the Synth and the environment starts to matter. The smaller the higher the difference has to be for the same change.
+#define SYNTH_SINGLE_INFLUENCE_COOLING_EFFECT_CAP 3		//How big can the multiplier for heat / pressure cooling be in an optimal environment
+#define SYNTH_TOTAL_ENVIRONMENT_EFFECT_CAP 2			//How big of an multiplier can the environment give in an optimal scenario (maximum efficiency in the end is 1, this just counters low coolant levels)
+#define SYNTH_ACTIVE_COOLING_TEMP_BOUNDARY 10			//The minimum distance from room temperature a Synth needs to have for active cooling to actively cool.
+
 #define BODYTEMP_NORMAL						310.15			//The natural temperature for a body
 #define BODYTEMP_AUTORECOVERY_DIVISOR		11		//This is the divisor which handles how much of the temperature difference between the current body temperature and 310.15K (optimal temperature) humans auto-regenerate each tick. The higher the number, the slower the recovery. This is applied each tick, so long as the mob is alive.
 #define BODYTEMP_AUTORECOVERY_MINIMUM		12		//Minimum amount of kelvin moved toward 310K per tick. So long as abs(310.15 - bodytemp) is more than 50.

code/__DEFINES/traits.dm

@@ -121,6 +121,7 @@
 #define TRAIT_ROBOTIC_ORGANISM	"robotic_organism"
 #define TRAIT_ROBOT_RADSHIELDING	"robot_radshielding"
 #define TRAIT_NOBREATH			"no_breath"
+#define TRAIT_AUXILIARY_LUNGS	"auxiliary_lungs"	//Lungs not neccessary required due to nobreath, but provides some other helpful function.
 #define TRAIT_ANTIMAGIC			"anti_magic"
 #define TRAIT_HOLY				"holy"
 #define TRAIT_DEPRESSION		"depression"

code/_globalvars/traits.dm

@@ -55,6 +55,7 @@ GLOBAL_LIST_INIT(traits_by_type, list(
 		"TRAIT_ROBOTIC_ORGANISM" = TRAIT_ROBOTIC_ORGANISM,
 		"TRAIT_ROBOT_RADSHIELDING" = TRAIT_ROBOT_RADSHIELDING,
 		"TRAIT_NOBREATH" = TRAIT_NOBREATH,
+		"TRAIT_AUXILIARY_LUNGS" = TRAIT_AUXILIARY_LUNGS,
 		"TRAIT_ANTIMAGIC" = TRAIT_ANTIMAGIC,
 		"TRAIT_HOLY" = TRAIT_HOLY,
 		"TRAIT_DEPRESSION" = TRAIT_DEPRESSION,

code/game/objects/items/devices/scanners.dm

@@ -325,7 +325,7 @@ GENETICS SCANNER
 		var/breathes = TRUE
 		var/blooded = TRUE
 		if(C.dna && C.dna.species)
-			if(HAS_TRAIT_FROM(C, TRAIT_NOBREATH, SPECIES_TRAIT))
+			if(!HAS_TRAIT_FROM(C, TRAIT_AUXILIARY_LUNGS, SPECIES_TRAIT) && HAS_TRAIT_FROM(C, TRAIT_NOBREATH, SPECIES_TRAIT))
 				breathes = FALSE
 			if(NOBLOOD in C.dna.species.species_traits)
 				blooded = FALSE
@@ -434,12 +434,13 @@ GENETICS SCANNER
 				if(R)
 					blood_type = R.name
 
+			
 			if((C.scan_blood_volume() + C.integrating_blood) <= (BLOOD_VOLUME_SAFE * C.blood_ratio) && (C.scan_blood_volume() + C.integrating_blood) > (BLOOD_VOLUME_OKAY*C.blood_ratio))
-				msg += "<span class='danger'>LOW blood level [blood_percent] %, [C.scan_blood_volume()] cl[C.integrating_blood? ", with [integrated_blood_percent] % of it integrating, [C.integrating_blood] cl " : ""].</span> <span class='info'>type: [blood_type]</span>\n"
+				msg += "<span class='danger'>LOW [HAS_TRAIT(C, TRAIT_ROBOTIC_ORGANISM) ? "coolant" : "blood"] level [blood_percent] %, [C.scan_blood_volume()] cl[C.integrating_blood? ", with [integrated_blood_percent] % of it integrating, [C.integrating_blood] cl " : ""].</span> <span class='info'>type: [blood_type]</span>\n"
 			else if((C.scan_blood_volume() + C.integrating_blood) <= (BLOOD_VOLUME_OKAY * C.blood_ratio))
-				msg += "<span class='danger'>CRITICAL blood level [blood_percent] %, [C.scan_blood_volume()] cl[C.integrating_blood? ", with [integrated_blood_percent] % of it integrating, [C.integrating_blood] cl " : ""].</span> <span class='info'>type: [blood_type]</span>\n"
+				msg += "<span class='danger'>CRITICAL [HAS_TRAIT(C, TRAIT_ROBOTIC_ORGANISM) ? "coolant" : "blood"] level [blood_percent] %, [C.scan_blood_volume()] cl[C.integrating_blood? ", with [integrated_blood_percent] % of it integrating, [C.integrating_blood] cl " : ""].</span> <span class='info'>type: [blood_type]</span>\n"
 			else
-				msg += "<span class='info'>Blood level [blood_percent] %, [C.scan_blood_volume()] cl[C.integrating_blood? ", with [integrated_blood_percent] % of it integrating, [C.integrating_blood] cl " : ""]. type: [blood_type]</span>\n"
+				msg += "<span class='info'>[HAS_TRAIT(C, TRAIT_ROBOTIC_ORGANISM) ? "Coolant" : "Blood"] level [blood_percent] %, [C.scan_blood_volume()] cl[C.integrating_blood? ", with [integrated_blood_percent] % of it integrating, [C.integrating_blood] cl " : ""]. type: [blood_type]</span>\n"
 
 
 		var/cyberimp_detect

code/modules/antagonists/abductor/equipment/glands/heal.dm

@@ -23,7 +23,7 @@
 		return
 
 	var/obj/item/organ/lungs/lungs = owner.getorganslot(ORGAN_SLOT_LUNGS)
-	if((!lungs && !HAS_TRAIT(owner, TRAIT_NOBREATH)) || (lungs && (istype(lungs, /obj/item/organ/lungs/cybernetic))))
+	if((!lungs && (HAS_TRAIT_FROM(owner, TRAIT_AUXILIARY_LUNGS, SPECIES_TRAIT) || !HAS_TRAIT(owner, TRAIT_NOBREATH))) || (lungs && (istype(lungs, /obj/item/organ/lungs/cybernetic))))
 		replace_lungs(lungs)
 		return
 

code/modules/mob/living/blood.dm

@@ -65,29 +65,30 @@
 				blood_volume = min(BLOOD_VOLUME_NORMAL, blood_volume + 0.5 * nutrition_ratio)
 
 		//Effects of bloodloss
-		var/word = pick("dizzy","woozy","faint")
-		var/blood_effect_volume = blood_volume + integrating_blood
-		switch(blood_effect_volume)
-			if(BLOOD_VOLUME_MAXIMUM to BLOOD_VOLUME_EXCESS)
-				if(prob(10))
-					to_chat(src, "<span class='warning'>You feel terribly bloated.</span>")
-			if(BLOOD_VOLUME_OKAY to BLOOD_VOLUME_SAFE)
-				if(prob(5))
-					to_chat(src, "<span class='warning'>You feel [word].</span>")
-				adjustOxyLoss(round((BLOOD_VOLUME_NORMAL - blood_volume) * 0.01, 1))
-			if(BLOOD_VOLUME_BAD to BLOOD_VOLUME_OKAY)
-				adjustOxyLoss(round((BLOOD_VOLUME_NORMAL - blood_volume) * 0.02, 1))
-				if(prob(5))
-					blur_eyes(6)
-					to_chat(src, "<span class='warning'>You feel very [word].</span>")
-			if(BLOOD_VOLUME_SURVIVE to BLOOD_VOLUME_BAD)
-				adjustOxyLoss(5)
-				if(prob(15))
-					Unconscious(rand(20,60))
-					to_chat(src, "<span class='warning'>You feel extremely [word].</span>")
-			if(-INFINITY to BLOOD_VOLUME_SURVIVE)
-				if(!HAS_TRAIT(src, TRAIT_NODEATH))
-					death()
+		if(!HAS_TRAIT(src, TRAIT_ROBOTIC_ORGANISM))	//Synths are immune to direct consequences of bloodloss, instead suffering penalties to heat exchange.
+			var/word = pick("dizzy","woozy","faint")
+			var/blood_effect_volume = blood_volume + integrating_blood
+			switch(blood_effect_volume)
+				if(BLOOD_VOLUME_MAXIMUM to BLOOD_VOLUME_EXCESS)
+					if(prob(10))
+						to_chat(src, "<span class='warning'>You feel terribly bloated.</span>")
+				if(BLOOD_VOLUME_OKAY to BLOOD_VOLUME_SAFE)
+					if(prob(5))
+						to_chat(src, "<span class='warning'>You feel [word].</span>")
+					adjustOxyLoss(round((BLOOD_VOLUME_NORMAL - blood_volume) * 0.01, 1))
+				if(BLOOD_VOLUME_BAD to BLOOD_VOLUME_OKAY)
+					adjustOxyLoss(round((BLOOD_VOLUME_NORMAL - blood_volume) * 0.02, 1))
+					if(prob(5))
+						blur_eyes(6)
+						to_chat(src, "<span class='warning'>You feel very [word].</span>")
+				if(BLOOD_VOLUME_SURVIVE to BLOOD_VOLUME_BAD)
+					adjustOxyLoss(5)
+					if(prob(15))
+						Unconscious(rand(20,60))
+						to_chat(src, "<span class='warning'>You feel extremely [word].</span>")
+				if(-INFINITY to BLOOD_VOLUME_SURVIVE)
+					if(!HAS_TRAIT(src, TRAIT_NODEATH))
+						death()
 
 		var/temp_bleed = 0
 		//Bleeding out

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

@@ -79,6 +79,8 @@
 	var/L = getorganslot(ORGAN_SLOT_LUNGS)
 
 	if(!L)
+		if(HAS_TRAIT(src, TRAIT_NOBREATH))
+			return
 		if(health >= crit_threshold)
 			adjustOxyLoss(HUMAN_MAX_OXYLOSS + 1)
 		else if(!HAS_TRAIT(src, TRAIT_NOCRITDAMAGE))

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

@@ -331,7 +331,7 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 
 	var/should_have_brain = TRUE
 	var/should_have_heart = !(NOBLOOD in species_traits)
-	var/should_have_lungs = !(TRAIT_NOBREATH in inherent_traits)
+	var/should_have_lungs = ((TRAIT_AUXILIARY_LUNGS in inherent_traits) || !(TRAIT_NOBREATH in inherent_traits))
 	var/should_have_appendix = !(TRAIT_NOHUNGER in inherent_traits)
 	var/should_have_eyes = TRUE
 	var/should_have_ears = TRUE
@@ -1165,7 +1165,10 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 
 		var/takes_crit_damage = !HAS_TRAIT(H, TRAIT_NOCRITDAMAGE)
 		if((H.health < H.crit_threshold) && takes_crit_damage)
-			H.adjustBruteLoss(1)
+			if(!HAS_TRAIT(H, TRAIT_ROBOTIC_ORGANISM))
+				H.adjustBruteLoss(1)
+			else
+				H.adjustFireLoss(1)	//Robots melt instead of taking brute.
 
 /datum/species/proc/spec_death(gibbed, mob/living/carbon/human/H)
 	if(H)
@@ -1874,7 +1877,7 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 			if(BODY_ZONE_HEAD)
 				if(!I.get_sharpness() && armor_block < 50)
 					if(prob(I.force))
-						if(HAS_TRAIT(src, TRAIT_ROBOTIC_ORGANISM))
+						if(HAS_TRAIT(H, TRAIT_ROBOTIC_ORGANISM))
 							H.adjustToxLoss(5, toxins_type = TOX_SYSCORRUPT) //Bonk! - Effectively 5 bonus damage
 						else
 							H.adjustOrganLoss(ORGAN_SLOT_BRAIN, 20)
@@ -2171,15 +2174,20 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 	//Thermal protection (insulation) has mixed benefits in two situations (hot in hot places, cold in hot places)
 	if(!H.on_fire) //If you're on fire, you do not heat up or cool down based on surrounding gases
 		var/natural = 0
+		var/cooling_efficiency = 1
 		if(H.stat != DEAD)
 			natural = H.natural_bodytemperature_stabilization()
+			cooling_efficiency = H.get_cooling_efficiency()
+
+		if(HAS_TRAIT(H, TRAIT_ROBOTIC_ORGANISM))	//Synths by default slowly heat up and need to lose said heat to the environment or active cooling.
+			H.adjust_bodytemperature(SYNTH_PASSIVE_HEAT_GAIN * (1 - cooling_efficiency), max_temp = T0C + 200)
 		var/thermal_protection = 1
 		if(loc_temp < H.bodytemperature) //Place is colder than we are
 			thermal_protection -= H.get_thermal_protection(loc_temp, TRUE) //This returns a 0 - 1 value, which corresponds to the percentage of protection based on what you're wearing and what you're exposed to.
 			if(H.bodytemperature < BODYTEMP_NORMAL) //we're cold, insulation helps us retain body heat and will reduce the heat we lose to the environment
-				H.adjust_bodytemperature((thermal_protection+1)*natural + max(thermal_protection * (loc_temp - H.bodytemperature) / BODYTEMP_COLD_DIVISOR, BODYTEMP_COOLING_MAX))
+				H.adjust_bodytemperature((thermal_protection+1)*natural + max((thermal_protection * (loc_temp - H.bodytemperature) * cooling_efficiency) / BODYTEMP_COLD_DIVISOR, BODYTEMP_COOLING_MAX))
 			else //we're sweating, insulation hinders our ability to reduce heat - and it will reduce the amount of cooling you get from the environment
-				H.adjust_bodytemperature(natural*(1/(thermal_protection+1)) + max((thermal_protection * (loc_temp - H.bodytemperature) + BODYTEMP_NORMAL - H.bodytemperature) / BODYTEMP_COLD_DIVISOR , BODYTEMP_COOLING_MAX)) //Extra calculation for hardsuits to bleed off heat
+				H.adjust_bodytemperature(natural*(1/(thermal_protection+1)) + max(((thermal_protection * (loc_temp - H.bodytemperature) + BODYTEMP_NORMAL - H.bodytemperature) * cooling_efficiency) / BODYTEMP_COLD_DIVISOR , BODYTEMP_COOLING_MAX)) //Extra calculation for hardsuits to bleed off heat
 		else //Place is hotter than we are
 			thermal_protection -= H.get_thermal_protection(loc_temp) //This returns a 0 - 1 value, which corresponds to the percentage of protection based on what you're wearing and what you're exposed to.
 			if(H.bodytemperature < BODYTEMP_NORMAL) //and we're cold, insulation enhances our ability to retain body heat but reduces the heat we get from the environment

code/modules/mob/living/carbon/human/species_types/anthropomorph.dm

@@ -24,11 +24,15 @@
 	id = SPECIES_MAMMAL_SYNTHETIC
 
 	species_traits = list(MUTCOLORS,NOTRANSSTING,EYECOLOR,LIPS,HAIR,ROBOTIC_LIMBS,HAS_FLESH,HAS_BONE,WINGCOLOR,HORNCOLOR)
-	inherent_traits = list(TRAIT_EASYDISMEMBER,TRAIT_LIMBATTACHMENT,TRAIT_NO_PROCESS_FOOD, TRAIT_ROBOTIC_ORGANISM)
+	inherent_traits = list(TRAIT_EASYDISMEMBER,TRAIT_LIMBATTACHMENT,TRAIT_NO_PROCESS_FOOD, TRAIT_ROBOTIC_ORGANISM, TRAIT_RESISTLOWPRESSURE, TRAIT_NOBREATH, TRAIT_AUXILIARY_LUNGS)
 	inherent_biotypes = MOB_ROBOTIC|MOB_HUMANOID|MOB_BEAST
 
 	meat = /obj/item/reagent_containers/food/snacks/meat/slab/human/mutant/ipc
 	gib_types = list(/obj/effect/gibspawner/ipc, /obj/effect/gibspawner/ipc/bodypartless)
+
+	coldmod = 0.5
+	heatmod = 1.2
+
 	//Just robo looking parts.
 	mutant_heart = /obj/item/organ/heart/ipc
 	mutantlungs = /obj/item/organ/lungs/ipc

code/modules/mob/living/carbon/human/species_types/ipc.dm

@@ -5,7 +5,7 @@
 	default_color = "00FF00"
 	blacklisted = 0
 	sexes = 0
-	inherent_traits = list(TRAIT_EASYDISMEMBER,TRAIT_LIMBATTACHMENT,TRAIT_NO_PROCESS_FOOD, TRAIT_ROBOTIC_ORGANISM)
+	inherent_traits = list(TRAIT_EASYDISMEMBER,TRAIT_LIMBATTACHMENT,TRAIT_NO_PROCESS_FOOD, TRAIT_ROBOTIC_ORGANISM, TRAIT_RESISTLOWPRESSURE, TRAIT_NOBREATH, TRAIT_AUXILIARY_LUNGS)
 	species_traits = list(MUTCOLORS,NOEYES,NOTRANSSTING,HAS_FLESH,HAS_BONE,HAIR,ROBOTIC_LIMBS)
 	hair_alpha = 210
 	inherent_biotypes = MOB_ROBOTIC|MOB_HUMANOID
@@ -13,6 +13,9 @@
 	meat = /obj/item/reagent_containers/food/snacks/meat/slab/human/mutant/ipc
 	gib_types = list(/obj/effect/gibspawner/ipc, /obj/effect/gibspawner/ipc/bodypartless)
 
+	coldmod = 0.5
+	heatmod = 1.2
+
 	//Just robo looking parts.
 	mutant_heart = /obj/item/organ/heart/ipc
 	mutantlungs = /obj/item/organ/lungs/ipc

code/modules/mob/living/carbon/human/species_types/synthliz.dm

@@ -4,11 +4,15 @@
 	say_mod = "beeps"
 	default_color = "00FF00"
 	species_traits = list(MUTCOLORS,NOTRANSSTING,EYECOLOR,LIPS,HAIR,ROBOTIC_LIMBS,HAS_FLESH,HAS_BONE)
-	inherent_traits = list(TRAIT_EASYDISMEMBER,TRAIT_LIMBATTACHMENT,TRAIT_NO_PROCESS_FOOD, TRAIT_ROBOTIC_ORGANISM)
+	inherent_traits = list(TRAIT_EASYDISMEMBER,TRAIT_LIMBATTACHMENT,TRAIT_NO_PROCESS_FOOD, TRAIT_ROBOTIC_ORGANISM, TRAIT_RESISTLOWPRESSURE, TRAIT_NOBREATH, TRAIT_AUXILIARY_LUNGS)
 	inherent_biotypes = MOB_ROBOTIC|MOB_HUMANOID
 	mutant_bodyparts = list("ipc_antenna" = "Synthetic Lizard - Antennae","mam_tail" = "Synthetic Lizard", "mam_snouts" = "Synthetic Lizard - Snout", "legs" = "Digitigrade", "mam_body_markings" = "Synthetic Lizard - Plates", "taur" = "None")
 	meat = /obj/item/reagent_containers/food/snacks/meat/slab/human/mutant/ipc
 	gib_types = list(/obj/effect/gibspawner/ipc, /obj/effect/gibspawner/ipc/bodypartless)
+
+	coldmod = 0.5
+	heatmod = 1.2
+
 	//Just robo looking parts.
 	mutant_heart = /obj/item/organ/heart/ipc
 	mutantlungs = /obj/item/organ/lungs/ipc

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

@@ -661,7 +661,7 @@ GLOBAL_LIST_INIT(ballmer_windows_me_msg, list("Yo man, what if, we like, uh, put
 
 //used in human and monkey handle_environment()
 /mob/living/carbon/proc/natural_bodytemperature_stabilization()
-	if (HAS_TRAIT(src, TRAIT_COLDBLOODED))
+	if(HAS_TRAIT(src, TRAIT_COLDBLOODED) || HAS_TRAIT(src, TRAIT_ROBOTIC_ORGANISM))
 		return 0 //Return 0 as your natural temperature. Species proc handle_environment() will adjust your temperature based on this.
 
 	var/body_temperature_difference = BODYTEMP_NORMAL - bodytemperature
@@ -674,6 +674,36 @@ GLOBAL_LIST_INIT(ballmer_windows_me_msg, list("Yo man, what if, we like, uh, put
 			return min(body_temperature_difference * metabolism_efficiency / BODYTEMP_AUTORECOVERY_DIVISOR, max(body_temperature_difference, -BODYTEMP_AUTORECOVERY_MINIMUM/4))
 		if(BODYTEMP_HEAT_DAMAGE_LIMIT to INFINITY)
 			return min((body_temperature_difference / BODYTEMP_AUTORECOVERY_DIVISOR), -BODYTEMP_AUTORECOVERY_MINIMUM)	//We're dealing with negative numbers
+
+/mob/living/carbon/proc/get_cooling_efficiency()
+	if(!HAS_TRAIT(src, TRAIT_ROBOTIC_ORGANISM))
+		return 1
+	
+	var/blood_effective_volume = blood_volume + integrating_blood
+	var/coolant_efficiency = min(blood_effective_volume / BLOOD_VOLUME_SAFE, 1)	//Low coolant is only a negative, adding more than needed will not help you.
+	var/environment_efficiency = get_environment_cooling_efficiency()
+
+	return min(coolant_efficiency * environment_efficiency, 1)
+
+
+/mob/living/carbon/proc/get_environment_cooling_efficiency()
+	if(istype(get_item_by_slot(SLOT_HEAD), /obj/item/clothing/head/helmet/space) && istype(get_item_by_slot(SLOT_WEAR_SUIT), /obj/item/clothing/suit/space))
+		return 1 //If you are wearing full EVA gear, assume it has been made to accomodate your cooling needs.
+	var/datum/gas_mixture/environment = loc.return_air()
+	if(!environment)
+		return 0
+
+	var/pressure = environment.return_pressure()
+	var/heat = environment.return_temperature()
+
+	var/heat_efficiency = clamp(1 + ((bodytemperature - heat) * SYNTH_HEAT_EFFICIENCY_COEFF), 0, SYNTH_SINGLE_INFLUENCE_COOLING_EFFECT_CAP)
+	var/pressure_efficiency = clamp(pressure / ONE_ATMOSPHERE, 0, SYNTH_SINGLE_INFLUENCE_COOLING_EFFECT_CAP)
+
+	var/total_environment_efficiency = min(heat_efficiency * pressure_efficiency, SYNTH_TOTAL_ENVIRONMENT_EFFECT_CAP)	//At best, you can get 200% total
+	return total_environment_efficiency
+
+
+
 /////////
 //LIVER//
 /////////

code/modules/reagents/chemistry/reagents/medicine_reagents.dm

@@ -17,7 +17,6 @@
 /datum/reagent/medicine/leporazine
 	name = "Leporazine"
 	description = "Leporazine will effectively regulate a patient's body temperature, ensuring it never leaves safe levels."
-	chemical_flags = REAGENT_ALL_PROCESS
 	pH = 8.4
 	color = "#82b8aa"
 	value = REAGENT_VALUE_COMMON

code/modules/surgery/organs/ears.dm

@@ -148,14 +148,14 @@
 		return
 	to_chat(owner, "<span class='warning'>Alert: Auditory systems corrupted!.</span>")
 	switch(severity)
-		if(1)
-			owner.Jitter(30)
-			owner.Dizzy(30)
-			owner.DefaultCombatKnockdown(80)
-			deaf = 30
-
-		if(2)
+		if(1 to 50)
 			owner.Jitter(15)
 			owner.Dizzy(15)
 			owner.DefaultCombatKnockdown(40)
+
+		if(50 to INFINITY)
+			owner.Jitter(30)
+			owner.Dizzy(30)
+			owner.DefaultCombatKnockdown(80)
+			deaf = max(deaf, 30)
 	damage += 0.15 * severity

code/modules/surgery/organs/lungs.dm

@@ -425,6 +425,10 @@
 /obj/item/organ/lungs/ipc
 	name = "ipc cooling system"
 	icon_state = "lungs-c"
+	var/is_cooling = 0
+	var/cooling_coolant_drain = 5	//Coolant (blood) use per tick of active cooling.
+	var/next_warn = BLOOD_VOLUME_NORMAL
+	actions_types = list(/datum/action/item_action/organ_action/toggle)
 
 /obj/item/organ/lungs/ipc/emp_act(severity) //Should probably put it somewhere else later
 	. = ..()
@@ -432,11 +436,62 @@
 		return
 	to_chat(owner, "<span class='warning'>Alert: Critical cooling system failure!</span>")
 	switch(severity)
-		if(1)
-			owner.adjust_bodytemperature(100*TEMPERATURE_DAMAGE_COEFFICIENT)
-		if(2)
+		if(1 to 50)
 			owner.adjust_bodytemperature(30*TEMPERATURE_DAMAGE_COEFFICIENT)
+		if(50 to INFINITY)
+			owner.adjust_bodytemperature(100*TEMPERATURE_DAMAGE_COEFFICIENT)
+	
+/obj/item/organ/lungs/ipc/ui_action_click(mob/user, actiontype)
+	if(!owner)
+		return
+	if(!HAS_TRAIT(user, TRAIT_ROBOTIC_ORGANISM))
+		to_chat(user, "<span class='notice'>Biotype incompatible with cooling system. Activation signal suppressed.</span>")
+		return
+	if(!is_cooling && owner.blood_volume < cooling_coolant_drain)
+		to_chat(user, "<span class='warning'>Coolant levels insufficient to enable active cooling - Replenish immediately.</span>")
+		return
 
+	is_cooling = !is_cooling
+	to_chat(user, "<span class='notice'>Active cooling [is_cooling ? "enabled" : "disabled"] - current coolant level: [round(owner.blood_volume / BLOOD_VOLUME_NORMAL * 100, 0.1)] percent.</span>")
+	var/possible_next_warn = owner.blood_volume - (BLOOD_VOLUME_NORMAL * 0.1)
+	if(possible_next_warn > next_warn)
+		next_warn = possible_next_warn	//If we recovered blood inbetween activations, update warning
+
+/obj/item/organ/lungs/ipc/on_life(seconds, times_fired)
+	. = ..()
+	if(!.)
+		if(is_cooling)
+			to_chat(owner, "<span class='warning'>Cooling system safeguards triggered - active cooling aborted.</span>")
+			is_cooling = 0
+		return
+	if(!is_cooling)
+		return
+	if(!HAS_TRAIT(owner, TRAIT_ROBOTIC_ORGANISM))
+		to_chat(owner, "<span class='warning'>Biotype incompatible with cooling system. Commencing emergency shutdown.</span>")
+		is_cooling = 0
+		return
+	if(owner.stat >= SOFT_CRIT)
+		to_chat(owner, "<span class='warning'>Operating system ping returned null response - Shutting down active cooling to avoid component damage.</span>")
+		is_cooling = 0
+		return
+	if(owner.blood_volume < cooling_coolant_drain)
+		to_chat(owner, "<span class='warning'>Coolant levels insufficient to maintain active cooling - Replenish immediately.</span>")
+		is_cooling = 0
+		return
+	if(abs(owner.bodytemperature - T20C) < SYNTH_ACTIVE_COOLING_TEMP_BOUNDARY)
+		return	//Does not drain coolant (blood) nor do anything if we are close enough to room temp.
+	var/cooling_efficiency =  owner.get_cooling_efficiency()
+	var/actual_drain = cooling_coolant_drain * max(1 - cooling_efficiency, 0.2)	//Being in a suitable environment reduces drain by up to 80%
+	var/temp_diff = owner.bodytemperature - T20C
+	if(temp_diff > 0)
+		owner.adjust_bodytemperature(min(((T20C - owner.bodytemperature) * max(cooling_efficiency, 0.2) / BODYTEMP_COLD_DIVISOR), BODYTEMP_COOLING_MAX))
+	else
+		owner.adjust_bodytemperature(min(((T20C - owner.bodytemperature) * max(cooling_efficiency, 0.2) / BODYTEMP_HEAT_DIVISOR), BODYTEMP_HEATING_MAX))
+	owner.blood_volume = max(owner.blood_volume - actual_drain, 0)
+	if(owner.blood_volume <= next_warn)
+		to_chat(owner, "[owner.blood_volume > BLOOD_VOLUME_BAD ? "<span class='notice'>" : "<span class='warning'>"]Coolant level passed threshold - now [round(owner.blood_volume / BLOOD_VOLUME_NORMAL * 100, 0.1)] percent.</span>")
+		next_warn -= (BLOOD_VOLUME_NORMAL * 0.1)
+			
 /obj/item/organ/lungs/plasmaman
 	name = "plasma filter"
 	desc = "A spongy rib-shaped mass for filtering plasma from the air."

code/modules/surgery/organs/organ_internal.dm

@@ -249,7 +249,7 @@
 	var/breathes = TRUE
 	var/blooded = TRUE
 	if(dna && dna.species)
-		if(HAS_TRAIT_FROM(src, TRAIT_NOBREATH, SPECIES_TRAIT))
+		if(!HAS_TRAIT_FROM(src, TRAIT_AUXILIARY_LUNGS, SPECIES_TRAIT) && HAS_TRAIT_FROM(src, TRAIT_NOBREATH, SPECIES_TRAIT))
 			breathes = FALSE
 		if(NOBLOOD in dna.species.species_traits)
 			blooded = FALSE

code/modules/surgery/organs/stomach.dm

@@ -136,11 +136,11 @@
 	if(!owner || . & EMP_PROTECT_SELF)
 		return
 	switch(severity)
-		if(1)
-			owner.nutrition = min(owner.nutrition - 50, 0)
+		if(1 to 50)
+			owner.nutrition = max(owner.nutrition - 50, 0)
 			to_chat(owner, "<span class='warning'>Alert: Detected severe battery discharge!</span>")
-		if(2)
-			owner.nutrition = min(owner.nutrition - 100, 0)
+		if(50 to INFINITY)
+			owner.nutrition = max(owner.nutrition - 100, 0)
 			to_chat(owner, "<span class='warning'>Alert: Minor battery discharge!</span>")
 
 /obj/item/organ/stomach/ethereal