TRAIT_UNKNOWN (#27471)

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

@@ -88,6 +88,8 @@
 	return ""
 
 /mob/living/carbon/examine(mob/user)
+	if(HAS_TRAIT(src, TRAIT_UNKNOWN))
+		return list("<span class='notice'>You're struggling to make out any details...</span>")
 	var/skipgloves = FALSE
 	var/skipsuitstorage = FALSE
 	var/skipjumpsuit = FALSE

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

@@ -284,6 +284,8 @@
 
 // Get rank from ID, ID inside PDA, PDA, ID in wallet, etc.
 /mob/living/carbon/human/proc/get_authentification_rank(if_no_id = "No id", if_no_job = "No job")
+	if(HAS_TRAIT(src, TRAIT_UNKNOWN))
+		return if_no_id
 	var/obj/item/card/id/id = wear_id?.GetID()
 	if(istype(id))
 		return id.rank || if_no_job
@@ -292,6 +294,8 @@
 //gets assignment from ID, PDA, Wallet, etc.
 //This should not be relied on for authentication, because PDAs show their owner's job, even if an ID is not inserted
 /mob/living/carbon/human/proc/get_assignment(if_no_id = "No id", if_no_job = "No job")
+	if(HAS_TRAIT(src, TRAIT_UNKNOWN))
+		return if_no_id
 	if(!wear_id)
 		return if_no_id
 	var/obj/item/card/id/id = wear_id.GetID()
@@ -331,6 +335,8 @@
 
 //repurposed proc. Now it combines get_id_name() and get_face_name() to determine a mob's name variable. Made into a seperate proc as it'll be useful elsewhere
 /mob/living/carbon/human/get_visible_name(id_override = FALSE)
+	if(HAS_TRAIT(src, TRAIT_UNKNOWN))
+		return "Unknown"
 	if(name_override)
 		return name_override
 	if(wear_mask && (wear_mask.flags_inv & HIDEFACE))	//Wearing a mask which hides our face, use id-name if possible

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

@@ -47,6 +47,9 @@
 	return FALSE
 
 /mob/living/carbon/human/GetVoice()
+	if(HAS_TRAIT(src, TRAIT_UNKNOWN))
+		return "Unknown"
+
 	var/has_changer = HasVoiceChanger()
 
 	if(has_changer)

code/modules/mob/living/init_signals.dm

@@ -27,6 +27,10 @@
 	RegisterSignal(src, SIGNAL_ADDTRAIT(TRAIT_RESTRAINED), PROC_REF(on_restrained_trait_gain))
 	RegisterSignal(src, SIGNAL_REMOVETRAIT(TRAIT_RESTRAINED), PROC_REF(on_restrained_trait_loss))
 
+	RegisterSignal(src, SIGNAL_ADDTRAIT(TRAIT_UNKNOWN), PROC_REF(on_unknown_trait))
+	RegisterSignal(src, SIGNAL_REMOVETRAIT(TRAIT_UNKNOWN), PROC_REF(on_unknown_trait))
+
+
 /// Called when [TRAIT_KNOCKEDOUT] is added to the mob.
 /mob/living/proc/on_knockedout_trait_gain(datum/source)
 	SIGNAL_HANDLER
@@ -160,3 +164,11 @@
 	REMOVE_TRAIT(src, TRAIT_KNOCKEDOUT, TRAIT_FAKEDEATH)
 	remove_status_effect(STATUS_EFFECT_REVIVABLE)
 
+/// Gaining or losing [TRAIT_UNKNOWN] updates our name and our sechud
+/mob/living/proc/on_unknown_trait(datum/source)
+	SIGNAL_HANDLER // SIGNAL_ADDTRAIT(TRAIT_UNKNOWN), SIGNAL_REMOVETRAIT(TRAIT_UNKNOWN)
+	addtimer(CALLBACK(src, PROC_REF(on_unknown_trait_part_2)), 0.1 SECONDS) // Remove signal is sent before the trait is removed, we need to wait a tick
+
+/mob/living/proc/on_unknown_trait_part_2()
+	name = get_visible_name()
+	sec_hud_set_ID()

code/modules/mob/living/living.dm

@@ -1189,3 +1189,5 @@
 /mob/living/proc/can_remote_apc_interface(obj/machinery/power/apc/ourapc)
 	return FALSE
 
+/mob/living/proc/sec_hud_set_ID()
+	return