Changeling additions:

* Changelings now have a chance to roll a special team objective (only 1 at the moment) the chance is 20*number_of_lings
* Changelings have no chance to roll a "backstab" (Ling vs Ling) objective if they have a team objective
* Debrain objective has been removed (it still exists, but is not handed out) as it's basically broken
* Engorged glands stats are now the default, engorged glands still functions as normal, adding 25 chem cap and doubling production
* Armblades may now break open powered doors after a 10 second wait (With progress bar)
* Changelings can now purchase Chameleon skin, which allows them to toggle on or off the genetics mutation "Chameleon skin" which slowly makes them invisible while stood still
* Minor adjustments to mimic voice text to line up with changes to chem stats

code/game/gamemodes/changeling/changeling.dm

@@ -40,6 +40,8 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 
 	var/const/changeling_amount = 4 //hard limit on changelings if scaling is turned off
 
+	var/changeling_team_objective_type = null //If this is not null, we hand our this objective to all lings
+
 /datum/game_mode/changeling/announce()
 	world << "<b>The current game mode is - Changeling!</b>"
 	world << "<b>There are alien changelings on the station. Do not let the changelings succeed!</b>"
@@ -72,6 +74,18 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 		return 0
 
 /datum/game_mode/changeling/post_setup()
+
+	//Decide if it's ok for the lings to have a team objective
+	//And then set it up to be handed out in forge_changeling_objectives
+	var/list/team_objectives = typesof(/datum/objective/changeling_team_objective) - /datum/objective/changeling_team_objective
+	var/list/possible_team_objectives = list()
+	for(var/datum/objective/changeling_team_objective/T in team_objectives)
+		if(changelings.len > initial(T.min_lings))
+			possible_team_objectives += T
+
+	if(possible_team_objectives.len && prob(20*changelings.len))
+		changeling_team_objective_type = pick(possible_team_objectives)
+
 	for(var/datum/mind/changeling in changelings)
 		log_game("[changeling.key] (ckey) has been selected as a changeling")
 		changeling.current.make_changeling()
@@ -92,12 +106,11 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 					if(!(character.job in restricted_jobs))
 						character.mind.make_Changling()
 
-/datum/game_mode/proc/forge_changeling_objectives(datum/mind/changeling)
+/datum/game_mode/proc/forge_changeling_objectives(datum/mind/changeling, var/team_mode = 0)
 	//OBJECTIVES - random traitor objectives. Unique objectives "steal brain" and "identity theft".
 	//No escape alone because changelings aren't suited for it and it'd probably just lead to rampant robusting
 	//If it seems like they'd be able to do it in play, add a 10% chance to have to escape alone
 
-
 	var/datum/objective/absorb/absorb_objective = new
 	absorb_objective.owner = changeling
 	absorb_objective.gen_amount_goal(6, 8)
@@ -108,12 +121,6 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 		steal_objective.owner = changeling
 		steal_objective.find_target()
 		changeling.objectives += steal_objective
-	else
-		var/datum/objective/debrain/debrain_objective = new
-		debrain_objective.owner = changeling
-		debrain_objective.find_target()
-		changeling.objectives += debrain_objective
-
 
 	var/list/active_ais = active_ais()
 	if(active_ais.len && prob(100/joined_player_list.len))
@@ -125,12 +132,18 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 		if(prob(70))
 			var/datum/objective/assassinate/kill_objective = new
 			kill_objective.owner = changeling
-			kill_objective.find_target()
+			if(team_mode) //No backstabbing while in a team
+				kill_objective.find_target_by_role(role = "Changeling", role_type = 1, invert = 1)
+			else
+				kill_objective.find_target()
 			changeling.objectives += kill_objective
 		else
 			var/datum/objective/maroon/maroon_objective = new
 			maroon_objective.owner = changeling
-			maroon_objective.find_target()
+			if(team_mode)
+				maroon_objective.find_target_by_role(role = "Changeling", role_type = 1, invert = 1)
+			else
+				maroon_objective.find_target()
 			changeling.objectives += maroon_objective
 
 			if (!(locate(/datum/objective/escape) in changeling.objectives))
@@ -150,7 +163,17 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 			identity_theft.owner = changeling
 			identity_theft.find_target()
 			changeling.objectives += identity_theft
-	return
+
+
+
+/datum/game_mode/changeling/forge_changeling_objectives(datum/mind/changeling)
+	if(changeling_team_objective_type)
+		var/datum/objective/changeling_team_objective/team_objective = new changeling_team_objective_type
+		team_objective.owner = changeling
+		changeling.objectives += team_objective
+
+	..(changeling,1)
+
 
 /datum/game_mode/proc/greet_changeling(datum/mind/changeling, you_are=1)
 	if (you_are)
@@ -237,8 +260,8 @@ var/list/possible_changeling_IDs = list("Alpha","Beta","Gamma","Delta","Epsilon"
 	var/dna_max = 4 //How many extra DNA strands the changeling can store for transformation.
 	var/absorbedcount = 1 //We would require at least 1 sample of compatible DNA to have taken on the form of a human.
 	var/chem_charges = 20
-	var/chem_storage = 50
-	var/chem_recharge_rate = 0.5
+	var/chem_storage = 75
+	var/chem_recharge_rate = 1
 	var/chem_recharge_slowdown = 0
 	var/sting_range = 2
 	var/changelingID = "Changeling"

code/game/gamemodes/changeling/powers/chameleon_skin.dm

@@ -0,0 +1,26 @@
+/obj/effect/proc_holder/changeling/chameleon_skin
+	name = "Chameleon Skin"
+	desc = "Our skin pigmentation rapidly changes to suit our current environment."
+	helptext = "Allows us to become invisible after a few seconds of standing still. Can be toggled on and off."
+	dna_cost = 2
+	chemical_cost = 25
+	req_human = 1
+	genetic_damage = 10
+	max_genetic_damage = 50
+
+
+/obj/effect/proc_holder/changeling/chameleon_skin/sting_action(mob/user)
+	var/mob/living/carbon/human/H = user //SHOULD always be human, because req_human = 1
+	if(!istype(H))
+		return
+	var/datum/mutation/human/HM = mutations_list[CHAMELEON]
+	if(H.dna && H.dna.mutations)
+		if(HM in H.dna.mutations)
+			HM.force_lose(H)
+		else
+			HM.force_give(H)
+
+	feedback_add_details("changeling_powers","CS")
+	return 1
+
+

code/game/gamemodes/changeling/powers/mimic_voice.dm

@@ -22,7 +22,7 @@
 
 	changeling.mimicing = mimic_voice
 	changeling.chem_recharge_slowdown += 0.5
-	user << "<span class='notice'>We shape our glands to take the voice of <b>[mimic_voice]</b>, this will stop us from regenerating chemicals while active.</span>"
-	user << "<span class='notice'>Use this power again to return to our original voice and reproduce chemicals again.</span>"
+	user << "<span class='notice'>We shape our glands to take the voice of <b>[mimic_voice]</b>, this will slow down regenerating chemicals while active.</span>"
+	user << "<span class='notice'>Use this power again to return to our original voice and return chemical production to normal levels.</span>"
 
 	feedback_add_details("changeling_powers","MV")

code/game/gamemodes/changeling/powers/mutations.dm

@@ -159,7 +159,12 @@
 			return
 
 		if(A.hasPower())
-			user << "<span class='warning'>The airlock's motors resist our efforts to force it!</span>"
+			if(A.locked)
+				user << "<span class='warning'>The airlock's bolts prevent it from being forced!</span>"
+				return
+			user << "<span class='warning'>The airlock's motors are resisting, this may take time...</span>"
+			if(do_after(user, 100, target = A))
+				A.open(2)
 			return
 
 		else if(A.locked)

code/game/gamemodes/objective.dm

@@ -33,11 +33,26 @@
 	update_explanation_text()
 	return target
 
-/datum/objective/proc/find_target_by_role(role, role_type=0)//Option sets either to check assigned role or special role. Default to assigned.
+/datum/objective/proc/find_target_by_role(role, role_type=0, invert=0)//Option sets either to check assigned role or special role. Default to assigned., invert inverts the check, eg: "Don't choose a Ling"
 	for(var/datum/mind/possible_target in ticker.minds)
-		if((possible_target != owner) && ishuman(possible_target.current) && ((role_type ? possible_target.special_role : possible_target.assigned_role) == role) )
-			target = possible_target
-			break
+		if((possible_target != owner) && ishuman(possible_target.current))
+			var/is_role = 0
+			if(role_type)
+				if(possible_target.special_role == role)
+					is_role++
+			else
+				if(possible_target.assigned_role == role)
+					is_role++
+
+			if(invert)
+				if(is_role)
+					continue
+				target = possible_target
+				break
+			else if(is_role)
+				target = possible_target
+				break
+
 	update_explanation_text()
 
 /datum/objective/proc/update_explanation_text()
@@ -50,8 +65,9 @@
 	dangerrating = 10
 	martyr_compatible = 1
 
-/datum/objective/assassinate/find_target_by_role(role, role_type=0)
-	target_role_type = role_type
+/datum/objective/assassinate/find_target_by_role(role, role_type=0, invert=0)
+	if(!invert)
+		target_role_type = role_type
 	..(role, role_type)
 	return target
 
@@ -70,13 +86,13 @@
 		explanation_text = "Free Objective"
 
 
-
 /datum/objective/mutiny
 	var/target_role_type=0
 	martyr_compatible = 1
 
-/datum/objective/mutiny/find_target_by_role(role, role_type=0)
-	target_role_type = role_type
+/datum/objective/mutiny/find_target_by_role(role, role_type=0,invert=0)
+	if(!invert)
+		target_role_type = role_type
 	..(role, role_type)
 	return target
 
@@ -104,8 +120,9 @@
 	dangerrating = 5
 	martyr_compatible = 1
 
-/datum/objective/maroon/find_target_by_role(role, role_type=0)
-	target_role_type = role_type
+/datum/objective/maroon/find_target_by_role(role, role_type=0, invert=0)
+	if(!invert)
+		target_role_type = role_type
 	..(role, role_type)
 	return target
 
@@ -129,8 +146,9 @@
 	var/target_role_type=0
 	dangerrating = 20
 
-/datum/objective/debrain/find_target_by_role(role, role_type=0)
-	target_role_type = role_type
+/datum/objective/debrain/find_target_by_role(role, role_type=0, invert=0)
+	if(!invert)
+		target_role_type = role_type
 	..(role, role_type)
 	return target
 
@@ -162,8 +180,9 @@
 	dangerrating = 10
 	martyr_compatible = 1
 
-/datum/objective/protect/find_target_by_role(role, role_type=0)
-	target_role_type = role_type
+/datum/objective/protect/find_target_by_role(role, role_type=0, invert=0)
+	if(!invert)
+		target_role_type = role_type
 	..(role, role_type)
 	return target
 
@@ -640,3 +659,84 @@ var/global/list/possible_items_special = list()
 	return 0
 
 
+
+////////////////////////////////
+// Changeling team objectives //
+////////////////////////////////
+
+/datum/objective/changeling_team_objective //Abstract type
+	martyr_compatible = 0	//Suicide is not teamwork!
+	explanation_text = "Changeling Friendship!"
+	var/min_lings = 3 //Minimum amount of lings for this team objective to be possible
+
+
+/datum/objective/changeling_team_objective/impersonate_heads
+	explanation_text = "Have X or more heads of staff escape on the shuttle disguised as heads, while the real heads are dead"
+	var/list/head_minds = list()
+	var/list/head_real_names = list()
+
+
+/datum/objective/changeling_team_objective/impersonate_heads/New(var/text)
+	..()
+
+	var/needed_heads = 0
+
+	//Heads amount is between min lings and the amount of heads possible
+	var/max_lings = ticker.mode.changelings.len
+	needed_heads = Clamp(needed_heads,min_lings,max_lings)
+	needed_heads = min(command_positions.len,needed_heads)
+
+	for(var/datum/mind/possible_head in ticker.minds)
+		if(possible_head.assigned_job.title in command_positions)
+			if(needed_heads)
+				head_minds += possible_head
+				head_real_names += possible_head.current.real_name
+				needed_heads--
+
+	if(!head_minds.len) //No heads, bail, you saw nothing, you never had a team objective, hahaha!
+		owner.objectives -= src
+		qdel(src)
+		return
+
+	explanation_text = "Ensure changelings impersonate and escape as the following heads of staff: "
+
+	var/first = 1
+	for(var/datum/mind/M in head_minds)
+		var/string = "[M.name] the [M.assigned_role]" //John the Head of Personnel
+		if(!first)
+			string = ", [M.name] the [M.assigned_role]" //Fred the Head of Security
+		else
+			first--
+		explanation_text += string
+
+	explanation_text += ", while the real heads are dead. This is a team objective."
+
+
+/datum/objective/changeling_team_objective/impersonate_heads/check_completion()
+	//Check each head mind to see if any of them made it to centcomm alive, if they did it's an automatic fail
+	for(var/datum/mind/HM in head_minds)
+		if(HM.current)
+			var/turf/hloc = get_turf(HM.current)
+			if(hloc.onCentcom() && (HM.current.stat != DEAD))
+				return 0 //A Non-ling living head-target got to centcom, fail
+
+	//Check each head has been replaced, by cross referencing changeling minds, changeling current dna, the heads minds and their original DNA names
+	var/success = 0
+	changelings:
+		for(var/datum/mind/changeling in ticker.mode.changelings)
+			if(success >= head_minds.len) //We did it, stop here!
+				return 1
+			if(ishuman(changeling.current))
+				var/mob/living/carbon/human/H = changeling.current
+				var/turf/cloc = get_turf(changeling.current)
+				if(cloc && cloc.onCentcom() && (changeling.current.stat != DEAD)) //Living changeling on centcomm....
+					for(var/name in head_real_names) //Is he (disguised as) a head?
+						if(H.dna && H.dna.real_name == name)
+							head_real_names -= name //This head is accounted for, remove them, so the team don't succeed by escape as 7 John the HoPs
+							success++ //A living changeling head made it to centcomm
+							continue changelings
+
+	if(success >= head_minds.len)
+		return 1
+	return 0
+

tgstation.dme

@@ -308,6 +308,7 @@
 #include "code\game\gamemodes\changeling\powers\absorb.dm"
 #include "code\game\gamemodes\changeling\powers\adrenaline.dm"
 #include "code\game\gamemodes\changeling\powers\augmented_eyesight.dm"
+#include "code\game\gamemodes\changeling\powers\chameleon_skin.dm"
 #include "code\game\gamemodes\changeling\powers\digitalcamo.dm"
 #include "code\game\gamemodes\changeling\powers\fakedeath.dm"
 #include "code\game\gamemodes\changeling\powers\fleshmend.dm"