CRAWLING

code/__DEFINES/mobs.dm

@@ -160,6 +160,9 @@
 /*   MOVE DEFINES   */
 #define MOVE_INTENT_WALK 1
 #define MOVE_INTENT_RUN  2
+// same but for xenos
+#define MOVE_INTENT_STALK 1
+#define MOVE_INTENT_HUNT  2
 
 /*   INTERNAL ORGAN DEFINES   */
 #define ORGAN_ASSISTED 1

code/modules/mob/living/carbon/xenomorph/XenoProcs.dm

@@ -226,6 +226,24 @@
 	if(inherent_verbs)
 		add_verb(src, inherent_verbs)
 
+// activates the buffs and debuffs of Stalk mode for certain castes , This is the generic proc but each xeno can have their own set of snowflake.
+/mob/living/carbon/xenomorph/set_movement_intent(new_intent)
+	. = ..()
+	if(caste)
+		walk_modifier = caste.walk_modifier
+		run_modifier = caste.run_modifier
+	if(!can_ventcrawl()) // for now only crawlers can get actual buffs for stalk mode
+		return
+	if(tier < 2)
+		return
+	switch(new_intent)
+		if(MOVE_INTENT_HUNT)
+			evasion_modifier = XENO_EVASION_NONE
+			remove_temp_pass_flags(PASS_MOB_IS_XENO|PASS_MOB_THRU_XENO)
+		if(MOVE_INTENT_STALK)
+			evasion_modifier += XENO_EVASION_MOD_ULTRA // this looks like a lot but evasion is broken and doesnt even work most of the time
+			add_temp_pass_flags(PASS_MOB_IS_XENO|PASS_MOB_THRU_XENO)
+	recalculate_evasion()
 
 //Adds or removes a delay to movement based on your caste. If speed = 0 then it shouldn't do much.
 //Runners are -2, -4 is BLINDLINGLY FAST, +2 is fat-level
@@ -237,9 +255,6 @@
 	if(frenzy_aura)
 		. -= (frenzy_aura * 0.05)
 
-	if(agility)
-		. += caste.agility_speed_increase
-
 	var/obj/effect/alien/weeds/W = locate(/obj/effect/alien/weeds) in loc
 	if (W)
 		if (W.linked_hive.hivenumber == hivenumber)

code/modules/mob/living/carbon/xenomorph/Xenomorph.dm

@@ -52,6 +52,7 @@
 	gender = NEUTER
 	icon_size = 48
 	black_market_value = KILL_MENDOZA
+	base_walk = 3 // Base stalk(walking) speed
 	///How much to horizontally adjust the sprites of held item onmobs by. Based on icon size. Most xenos have hands about the same height as a human's.
 	var/xeno_inhand_item_offset
 	dead_black_market_value = 50
@@ -95,7 +96,7 @@
 	var/plasma_max = 10
 	var/plasma_gain = 5
 	var/cooldown_reduction_percentage = 0 // By what % cooldown are reduced by. 1 => No cooldown. Should normally be clamped at 50%
-
+	var/can_vent_crawl = FALSE
 	var/death_fontsize = 3
 
 	var/small_explosives_stun = TRUE // Have to put this here, otherwise it can't be strain specific

code/modules/mob/living/carbon/xenomorph/abilities/xeno_action.dm

@@ -71,6 +71,8 @@
 	if(!owner)
 		return FALSE
 	var/mob/living/carbon/xenomorph/X = owner
+	if(X.m_intent == MOVE_INTENT_STALK && X.tier < 2)
+		return FALSE
 	if(X && !X.is_mob_incapacitated() && !HAS_TRAIT(X, TRAIT_DAZED) && X.body_position == STANDING_UP && !X.buckled && X.plasma_stored >= plasma_cost)
 		return TRUE
 

code/modules/mob/living/carbon/xenomorph/castes/Drone.dm

@@ -11,6 +11,7 @@
 	armor_deflection = XENO_NO_ARMOR
 	evasion = XENO_EVASION_MEDIUM
 	speed = XENO_SPEED_TIER_7
+	walk_modifier = XENO_SPEED_HELLHOUND // no penalty to crawling
 
 	available_strains = list(
 		/datum/xeno_strain/gardener,
@@ -50,7 +51,7 @@
 	desc = "An alien drone"
 	icon = 'icons/mob/xenos/drone.dmi'
 	icon_size = 48
-	icon_state = "Drone Walking"
+	icon_state = "Drone Running"
 	plasma_types = list(PLASMA_PURPLE)
 	tier = 1
 	organ_value = 800

code/modules/mob/living/carbon/xenomorph/castes/caste_datum.dm

@@ -12,6 +12,8 @@
 	var/evasion = XENO_EVASION_NONE
 
 	var/speed = XENO_SPEED_TIER_10
+	var/walk_modifier = 0
+	var/run_modifier = 0
 
 	var/plasma_max = 10
 	var/plasma_gain = 5
@@ -97,7 +99,7 @@
 	var/can_be_queen_healed = TRUE
 	var/can_be_revived = TRUE
 
-	var/can_vent_crawl = 1
+	var/can_vent_crawl = TRUE
 
 	var/caste_luminosity = 0
 

code/modules/mob/living/carbon/xenomorph/castes/lesser_drone.dm

@@ -11,6 +11,7 @@
 	armor_deflection = XENO_NO_ARMOR
 	evasion = XENO_EVASION_LOW
 	speed = XENO_SPEED_TIER_6
+	walk_modifier = XENO_SPEED_HELLHOUND
 
 	evolution_allowed = FALSE
 	can_be_revived = FALSE

code/modules/mob/mob.dm

@@ -224,9 +224,9 @@
 /mob/proc/movement_delay()
 	switch(m_intent)
 		if(MOVE_INTENT_RUN)
-			. = 2 + CONFIG_GET(number/run_speed)
+			. = base_run + CONFIG_GET(number/run_speed) + run_modifier
 		if(MOVE_INTENT_WALK)
-			. = 7 + CONFIG_GET(number/walk_speed)
+			. = base_walk + CONFIG_GET(number/walk_speed) + walk_modifier
 	. += speed
 	move_delay = .
 

code/modules/mob/mob_defines.dm

@@ -43,6 +43,10 @@
 	var/recalculate_move_delay = TRUE // Whether move delay needs to be recalculated, on by default so that new mobs actually get movement delay calculated upon creation
 	var/crawling = FALSE
 	var/can_crawl = TRUE
+	var/base_walk = 4 // Base walking speed
+	var/base_run = 2 // Base running speed
+	var/walk_modifier = 0 // speed modifier for Walk mode
+	var/run_modifier = 0 // speed modifier for Run mode
 	var/monkeyizing = null //Carbon
 	var/hand = null