diff --git a/code/game/gamemodes/heist/heist.dm b/code/game/gamemodes/heist/heist.dm
index 6b71348f054..16a452ac651 100644
--- a/code/game/gamemodes/heist/heist.dm
+++ b/code/game/gamemodes/heist/heist.dm
@@ -103,7 +103,6 @@ var/global/list/obj/cortical_stacks = list() //Stacks for 'leave nobody behind'
 	vox.name = vox.real_name
 	newraider.name = vox.name
 	vox.age = rand(12,20)
-	vox.dna.mutantrace = "vox"
 	vox.set_species("Vox")
 	vox.languages = list() // Removing language from chargen.
 	vox.flavor_text = ""
diff --git a/code/modules/admin/verbs/modifyvariables.dm b/code/modules/admin/verbs/modifyvariables.dm
index 49ded54e4c5..c7d5853ae31 100644
--- a/code/modules/admin/verbs/modifyvariables.dm
+++ b/code/modules/admin/verbs/modifyvariables.dm
@@ -268,7 +268,7 @@ var/list/forbidden_varedit_object_types = list(
 /client/proc/modify_variables(var/atom/O, var/param_var_name = null, var/autodetect_class = 0)
 	if(!check_rights(R_VAREDIT))	return
 
-	var/list/locked = list("vars", "key", "ckey", "client", "firemut", "ishulk", "telekinesis", "xray", "virus", "cuffed", "ka", "last_eaten", "icon", "icon_state", "mutantrace")
+	var/list/locked = list("vars", "key", "ckey", "client", "firemut", "ishulk", "telekinesis", "xray", "virus", "cuffed", "ka", "last_eaten", "icon", "icon_state")
 
 	for(var/p in forbidden_varedit_object_types)
 		if( istype(O,p) )
diff --git a/code/modules/admin/verbs/one_click_antag.dm b/code/modules/admin/verbs/one_click_antag.dm
index f45154aaf52..1cfd5174c17 100644
--- a/code/modules/admin/verbs/one_click_antag.dm
+++ b/code/modules/admin/verbs/one_click_antag.dm
@@ -516,7 +516,6 @@ client/proc/one_click_antag()
 	new_vox.real_name = capitalize(newname)
 	new_vox.name = new_vox.real_name
 	new_vox.age = rand(12,20)
-	new_vox.dna.mutantrace = "vox"
 	new_vox.set_species("Vox")
 	new_vox.languages = list() // Removing language from chargen.
 	new_vox.flavor_text = ""
diff --git a/code/modules/awaymissions/corpse.dm b/code/modules/awaymissions/corpse.dm
index 0ede8d0ba98..f472b070830 100644
--- a/code/modules/awaymissions/corpse.dm
+++ b/code/modules/awaymissions/corpse.dm
@@ -23,7 +23,6 @@
 	var/corpseidjob = null // Needs to be in quotes, such as "Clown" or "Chef." This just determines what the ID reads as, not their access
 	var/corpseidaccess = null //This is for access. See access.dm for which jobs give what access. Again, put in quotes. Use "Captain" if you want it to be all access.
 	var/corpseidicon = null //For setting it to be a gold, silver, centcomm etc ID
-	var/mutantrace = "human"
 	var/timeofdeath = null
 	var/coffin = 0
 
diff --git a/code/modules/computer3/file.dm b/code/modules/computer3/file.dm
index 849312ec50e..1cbb363894a 100644
--- a/code/modules/computer3/file.dm
+++ b/code/modules/computer3/file.dm
@@ -140,7 +140,6 @@
 
 /datum/file/data/genome/SE
 	name = "Structural Enzymes"
-	var/mutantrace = null
 
 /datum/file/data/genome/UE
 	name = "Unique Enzymes"
diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index d6885fa8390..6c7c0ae9686 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -695,63 +695,6 @@ var/global/list/brutefireloss_overlays = list("1" = image("icon" = 'icons/mob/sc
 
 		return min(1,thermal_protection)
 
-	/*
-	proc/add_fire_protection(var/temp)
-		var/fire_prot = 0
-		if(head)
-			if(head.protective_temperature > temp)
-				fire_prot += (head.protective_temperature/10)
-		if(wear_mask)
-			if(wear_mask.protective_temperature > temp)
-				fire_prot += (wear_mask.protective_temperature/10)
-		if(glasses)
-			if(glasses.protective_temperature > temp)
-				fire_prot += (glasses.protective_temperature/10)
-		if(ears)
-			if(ears.protective_temperature > temp)
-				fire_prot += (ears.protective_temperature/10)
-		if(wear_suit)
-			if(wear_suit.protective_temperature > temp)
-				fire_prot += (wear_suit.protective_temperature/10)
-		if(w_uniform)
-			if(w_uniform.protective_temperature > temp)
-				fire_prot += (w_uniform.protective_temperature/10)
-		if(gloves)
-			if(gloves.protective_temperature > temp)
-				fire_prot += (gloves.protective_temperature/10)
-		if(shoes)
-			if(shoes.protective_temperature > temp)
-				fire_prot += (shoes.protective_temperature/10)
-
-		return fire_prot
-
-	proc/handle_temperature_damage(body_part, exposed_temperature, exposed_intensity)
-		if(nodamage)
-			return
-		//world <<"body_part = [body_part], exposed_temperature = [exposed_temperature], exposed_intensity = [exposed_intensity]"
-		var/discomfort = min(abs(exposed_temperature - bodytemperature)*(exposed_intensity)/2000000, 1.0)
-
-		if(exposed_temperature > bodytemperature)
-			discomfort *= 4
-
-		if(mutantrace == "plant")
-			discomfort *= TEMPERATURE_DAMAGE_COEFFICIENT * 2 //I don't like magic numbers. I'll make mutantraces a datum with vars sometime later. -- Urist
-		else
-			discomfort *= TEMPERATURE_DAMAGE_COEFFICIENT //Dangercon 2011 - now with less magic numbers!
-		//world <<"[discomfort]"
-
-		switch(body_part)
-			if(HEAD)
-				apply_damage(2.5*discomfort, BURN, "head")
-			if(UPPER_TORSO)
-				apply_damage(2.5*discomfort, BURN, "chest")
-			if(LEGS)
-				apply_damage(0.6*discomfort, BURN, "l_leg")
-				apply_damage(0.6*discomfort, BURN, "r_leg")
-			if(ARMS)
-				apply_damage(0.4*discomfort, BURN, "l_arm")
-				apply_damage(0.4*discomfort, BURN, "r_arm")
-	*/
 
 	proc/get_covered_bodyparts()
 		var/covered = 0
@@ -1174,9 +1117,6 @@ var/global/list/brutefireloss_overlays = list("1" = image("icon" = 'icons/mob/sc
 					if("slime")
 						see_in_dark = 3
 						see_invisible = SEE_INVISIBLE_LEVEL_ONE
-					if("shadow")
-						see_in_dark = 8
-						see_invisible = SEE_INVISIBLE_OBSERVER_NOLIGHTING
 
 			if(mind && mind.vampire)
 				if((VAMP_VISION in mind.vampire.powers) && !(VAMP_FULL in mind.vampire.powers))
diff --git a/code/modules/mob/living/carbon/human/update_icons.dm b/code/modules/mob/living/carbon/human/update_icons.dm
index 1358d8cc1b9..087159b6787 100644
--- a/code/modules/mob/living/carbon/human/update_icons.dm
+++ b/code/modules/mob/living/carbon/human/update_icons.dm
@@ -452,9 +452,6 @@ proc/get_damage_icon_part(damage_state, body_part)
 			else
 				overlays_standing[MUTANTRACE_LAYER]	= null
 
-	if(!dna || !(dna.mutantrace in list("metroid")))
-		update_body(0)
-
 	update_hair(0)
 	if(update_icons)   update_icons()
 
diff --git a/code/modules/mob/living/carbon/monkey/diona.dm b/code/modules/mob/living/carbon/monkey/diona.dm
index cec0ef681ac..97599c956fa 100644
--- a/code/modules/mob/living/carbon/monkey/diona.dm
+++ b/code/modules/mob/living/carbon/monkey/diona.dm
@@ -15,7 +15,6 @@
 
 	..()
 	gender = NEUTER
-	dna.mutantrace = "plant"
 	greaterform = "Diona"
 	add_language("Rootspeak")
 	verbs -= /mob/living/carbon/monkey/verb/ventcrawl
@@ -46,7 +45,6 @@
 
 	..()
 	gender = NEUTER
-	dna.mutantrace = "plant"
 	greaterform = "Diona"
 	add_language("Rootspeak")
 	src.verbs += /mob/living/carbon/monkey/diona/proc/merge
diff --git a/code/modules/mob/living/carbon/monkey/monkey.dm b/code/modules/mob/living/carbon/monkey/monkey.dm
index 7d03ff94d40..fac2f461346 100644
--- a/code/modules/mob/living/carbon/monkey/monkey.dm
+++ b/code/modules/mob/living/carbon/monkey/monkey.dm
@@ -80,7 +80,6 @@
 /mob/living/carbon/monkey/unathi/New()
 
 	..()
-	dna.mutantrace = "lizard"
 	greaterform = "Unathi"
 	dna.species = "Unathi"
 	add_language("Sinta'unathi")
@@ -88,7 +87,6 @@
 /mob/living/carbon/monkey/skrell/New()
 
 	..()
-	dna.mutantrace = "skrell"
 	greaterform = "Skrell"
 	dna.species = "Skrell"
 	add_language("Skrellian")
@@ -96,7 +94,6 @@
 /mob/living/carbon/monkey/tajara/New()
 
 	..()
-	dna.mutantrace = "tajaran"
 	greaterform = "Tajaran"
 	dna.species = "Tajaran"
 	add_language("Siik'tajr")
@@ -106,7 +103,6 @@
 	..()
 	alien = 1
 	gender = NEUTER
-	dna.mutantrace = "plant"
 	greaterform = "Diona"
 	dna.species = "Diona"
 	add_language("Rootspeak")
diff --git a/code/modules/mob/living/carbon/species.dm b/code/modules/mob/living/carbon/species.dm
index fb6e4588a62..e0159cebdac 100644
--- a/code/modules/mob/living/carbon/species.dm
+++ b/code/modules/mob/living/carbon/species.dm
@@ -14,7 +14,6 @@
 	var/tail                     // Name of tail image in species effects icon file.
 	var/unarmed                  //For empty hand harm-intent attack
 	var/unarmed_type = /datum/unarmed_attack
-	var/mutantrace               // Safeguard due to old code.
 
 	var/breath_type = "oxygen"   // Non-oxygen gas breathed, if any.
 	var/poison_type = "plasma"   // Poisonous air.
diff --git a/code/modules/projectiles/gun.dm b/code/modules/projectiles/gun.dm
index 36e0ecaff12..430418dfaa8 100644
--- a/code/modules/projectiles/gun.dm
+++ b/code/modules/projectiles/gun.dm
@@ -104,7 +104,8 @@
 			M << "\red Your meaty finger is much too large for the trigger guard!"
 			return
 	if(ishuman(user))
-		if(user.dna && user.dna.mutantrace == "adamantine")
+		var/mob/living/carbon/human/H = user
+		if(H.species.name == "Golem")
 			user << "\red Your metal fingers don't fit in the trigger guard!"
 			return
 
@@ -128,7 +129,7 @@
 
 	if(!in_chamber)
 		return
-		
+
 	if(heavy_weapon)
 		if(user.get_inactive_hand())
 			recoil = 4 //one-handed kick
@@ -154,7 +155,7 @@
 		user.visible_message("<span class='warning'>[user] fires [src][reflex ? " by reflex":""]!</span>", \
 		"<span class='warning'>You fire [src][reflex ? "by reflex":""]!</span>", \
 		"You hear a [istype(in_chamber, /obj/item/projectile/beam) ? "laser blast" : "gunshot"]!")
-		
+
 	if(heavy_weapon)
 		if(user.get_inactive_hand())
 			if(prob(15))
diff --git a/code/modules/projectiles/projectile/magic.dm b/code/modules/projectiles/projectile/magic.dm
index 74d91d2c4e3..506be488ea0 100644
--- a/code/modules/projectiles/projectile/magic.dm
+++ b/code/modules/projectiles/projectile/magic.dm
@@ -214,11 +214,6 @@ proc/wabbajack(mob/living/M)
 					var/datum/preferences/A = new()	//Randomize appearance for the human
 					A.copy_to(new_mob)
 
-					var/mob/living/carbon/human/human/H = new_mob
-//					ready_dna(H)
-					if(H.dna)
-						H.dna.mutantrace = pick("lizard","plant","fly","skeleton",8;"")
-						H.update_body()
 				else
 					return
 
diff --git a/code/modules/projectiles/projectile/special.dm b/code/modules/projectiles/projectile/special.dm
index 3461b9a3856..77d5ea37bc8 100644
--- a/code/modules/projectiles/projectile/special.dm
+++ b/code/modules/projectiles/projectile/special.dm
@@ -96,7 +96,6 @@
 
 	on_hit(var/atom/target, var/blocked = 0)
 		var/mob/living/M = target
-//		if(ishuman(target) && M.dna && M.dna.mutantrace == "plant") //Plantmen possibly get mutated and damaged by the rays.
 		if(ishuman(target))
 			var/mob/living/carbon/human/H = M
 			if((H.species.flags & IS_PLANT) && (M.nutrition < 500))
@@ -136,7 +135,6 @@
 
 	on_hit(var/atom/target, var/blocked = 0)
 		var/mob/M = target
-//		if(ishuman(target) && M.dna && M.dna.mutantrace == "plant") //These rays make plantmen fat.
 		if(ishuman(target)) //These rays make plantmen fat.
 			var/mob/living/carbon/human/H = M
 			if((H.species.flags & IS_PLANT) && (M.nutrition < 500))
diff --git a/code/modules/reagents/newchem/toxins.dm b/code/modules/reagents/newchem/toxins.dm
index c173c5adbea..a052895ab46 100644
--- a/code/modules/reagents/newchem/toxins.dm
+++ b/code/modules/reagents/newchem/toxins.dm
@@ -602,7 +602,7 @@ datum/reagent/atrazine/reaction_mob(var/mob/living/M, var/method=TOUCH, var/volu
 		if(ismonkey(M))
 			var/mob/living/carbon/monkey/MO = M
 			if(MO.dna)
-				if(MO.dna.mutantrace == "plant") //plantmen monkeys (diona) take EVEN MORE damage
+				if(istype(MO,/mob/living/carbon/monkey/diona)) //plantmen monkeys (diona) take EVEN MORE damage
 					MO.adjustToxLoss(100)
 					..()
 					return