Adds New PoI Features + Bonus PoI (#5796)

* Adds cliffs.

* Finishes lava and polishes the other things.

* Hopefully finished with all the new shinies.

code/game/atoms_movable.dm

@@ -290,6 +290,10 @@
 	icon_rotation = new_rotation
 	update_transform()
 
+// Called when touching a lava tile.
+/atom/movable/proc/lava_act()
+	fire_act(null, 10000, 1000)
+
 // Called when something changes z-levels.
 /atom/movable/proc/on_z_change(old_z, new_z)
 	GLOB.z_moved_event.raise_event(src, old_z, new_z)

code/game/objects/effects/map_effects/effect_emitter.dm

@@ -18,7 +18,7 @@
 	return ..()
 
 /obj/effect/map_effect/interval/effect_emitter/proc/configure_effects()
-	effect_system.set_up(effect_amount, effect_cardinals_only, usr.loc, effect_forced_dir)
+	effect_system.set_up(effect_amount, effect_cardinals_only, src.loc, effect_forced_dir)
 
 /obj/effect/map_effect/interval/effect_emitter/trigger()
 	configure_effects() // We do this every interval in case it changes.

code/game/objects/effects/map_effects/map_effects.dm

@@ -49,6 +49,7 @@
 		spawn(retry_delay) // Maybe someday we'll have fancy TG timers/schedulers.
 			if(!QDELETED(src))
 				.()
+		return
 
 	var/next_interval = rand(interval_lower_bound, interval_upper_bound)
 	spawn(next_interval)

code/game/objects/effects/mines.dm

@@ -10,6 +10,7 @@
 	var/mineitemtype = /obj/item/weapon/mine
 	var/panel_open = 0
 	var/datum/wires/mines/wires = null
+	register_as_dangerous_object = TRUE
 
 /obj/effect/mine/New()
 	icon_state = "uglyminearmed"
@@ -271,4 +272,10 @@
 /obj/item/weapon/mine/incendiary
 	name = "incendiary mine"
 	desc = "A small explosive mine with a fire symbol on the side."
-	minetype = /obj/effect/mine/incendiary
+	minetype = /obj/effect/mine/incendiary
+
+// This tells AI mobs to not be dumb and step on mines willingly.
+/obj/item/weapon/mine/is_safe_to_step(mob/living/L)
+	if(!L.hovering)
+		return FALSE
+	return ..()

code/game/objects/effects/step_triggers.dm

@@ -3,7 +3,8 @@
 /obj/effect/step_trigger
 	var/affect_ghosts = 0
 	var/stopper = 1 // stops throwers
-	invisibility = 101 // nope cant see this shit
+	invisibility = 99 // nope cant see this shit
+	plane = ABOVE_PLANE
 	anchored = 1
 
 /obj/effect/step_trigger/proc/Trigger(var/atom/movable/A)
@@ -93,21 +94,56 @@
 	var/teleport_y = 0
 	var/teleport_z = 0
 
-	Trigger(var/atom/movable/A)
-		if(teleport_x && teleport_y && teleport_z)
-			var/turf/T = locate(teleport_x, teleport_y, teleport_z)
-			if(isliving(A))
-				var/mob/living/L = A
-				if(L.pulling)
-					var/atom/movable/P = L.pulling
-					L.stop_pulling()
-					P.forceMove(T)
-					L.forceMove(T)
-					L.start_pulling(P)
-				else
-					A.forceMove(T)
-			else
-				A.forceMove(T)
+/obj/effect/step_trigger/teleporter/Trigger(atom/movable/AM)
+	if(teleport_x && teleport_y && teleport_z)
+		var/turf/T = locate(teleport_x, teleport_y, teleport_z)
+		move_object(AM, T)
+
+
+/obj/effect/step_trigger/teleporter/proc/move_object(atom/movable/AM, turf/T)
+	if(AM.anchored)
+		return
+
+	if(isliving(AM))
+		var/mob/living/L = AM
+		if(L.pulling)
+			var/atom/movable/P = L.pulling
+			L.stop_pulling()
+			P.forceMove(T)
+			L.forceMove(T)
+			L.start_pulling(P)
+		else
+			L.forceMove(T)
+	else
+		AM.forceMove(T)
+
+/* Moves things by an offset, useful for 'Bridges'. Uses dir and a distance var to work with maploader direction changes. */
+/obj/effect/step_trigger/teleporter/offset
+	icon = 'icons/effects/effects.dmi'
+	icon_state = "arrow"
+	var/distance = 3
+
+/obj/effect/step_trigger/teleporter/offset/north
+	dir = NORTH
+
+/obj/effect/step_trigger/teleporter/offset/south
+	dir = SOUTH
+
+/obj/effect/step_trigger/teleporter/offset/east
+	dir = EAST
+
+/obj/effect/step_trigger/teleporter/offset/west
+	dir = WEST
+
+/obj/effect/step_trigger/teleporter/offset/Trigger(atom/movable/AM)
+	var/turf/T = get_turf(src)
+	for(var/i = 1 to distance)
+		T = get_step(T, dir)
+		if(!istype(T))
+			return
+	move_object(AM, T)
+
+
 
 /* Random teleporter, teleports atoms to locations ranging from teleport_x - teleport_x_offset, etc */
 

code/game/objects/objs.dm

@@ -18,11 +18,29 @@
 	var/can_speak = 0 //For MMIs and admin trickery. If an object has a brainmob in its contents, set this to 1 to allow it to speak.
 
 	var/show_examine = TRUE	// Does this pop up on a mob when the mob is examined?
+	var/register_as_dangerous_object = FALSE // Should this tell its turf that it is dangerous automatically?
+
+/obj/Initialize()
+	if(register_as_dangerous_object)
+		register_dangerous_to_step()
+	return ..()
 
 /obj/Destroy()
 	STOP_PROCESSING(SSobj, src)
+	if(register_as_dangerous_object)
+		unregister_dangerous_to_step()
 	return ..()
 
+/obj/Moved(atom/oldloc)
+	. = ..()
+	if(register_as_dangerous_object)
+		var/turf/old_turf = get_turf(oldloc)
+		var/turf/new_turf = get_turf(src)
+
+		if(old_turf != new_turf)
+			old_turf.unregister_dangerous_object(src)
+			new_turf.register_dangerous_object(src)
+
 /obj/Topic(href, href_list, var/datum/topic_state/state = default_state)
 	if(usr && ..())
 		return 1
@@ -161,4 +179,19 @@
 	return
 
 /obj/proc/get_cell()
-	return
+	return
+
+// Used to mark a turf as containing objects that are dangerous to step onto.
+/obj/proc/register_dangerous_to_step()
+	var/turf/T = get_turf(src)
+	if(T)
+		T.register_dangerous_object(src)
+
+/obj/proc/unregister_dangerous_to_step()
+	var/turf/T = get_turf(src)
+	if(T)
+		T.unregister_dangerous_object(src)
+
+// Test for if stepping on a tile containing this obj is safe to do, used for things like landmines and cliffs.
+/obj/proc/is_safe_to_step(mob/living/L)
+	return TRUE

code/game/objects/random/unidentified/medicine.dm

@@ -15,7 +15,7 @@ much more likely to show up. This is done for several purposes;
 	name = "unidentified medicine"
 	desc = "This will make a random hypo."
 	icon = 'icons/obj/syringe.dmi'
-	item_state = "hypo"
+	icon_state = "autoinjector1"
 
 /obj/random/unidentified_medicine/item_to_spawn()
 	return pick(

code/game/objects/structures.dm

@@ -3,9 +3,11 @@
 	w_class = ITEMSIZE_NO_CONTAINER
 
 	var/climbable
+	var/climb_delay = 3.5 SECONDS
 	var/breakable
 	var/parts
 	var/list/climbers = list()
+	var/block_turf_edges = FALSE // If true, turf edge icons will not be made on the turf this occupies.
 
 /obj/structure/Destroy()
 	if(parts)
@@ -99,7 +101,7 @@
 	usr.visible_message("<span class='warning'>[user] starts climbing onto \the [src]!</span>")
 	climbers |= user
 
-	if(!do_after(user,(issmall(user) ? 20 : 34)))
+	if(!do_after(user,(issmall(user) ? climb_delay * 0.6 : climb_delay)))
 		climbers -= user
 		return
 

code/game/objects/structures/cliff.dm

@@ -0,0 +1,239 @@
+GLOBAL_LIST_EMPTY(cliff_icon_cache)
+
+/*
+Cliffs give a visual illusion of depth by seperating two places while presenting a 'top' and 'bottom' side.
+
+Mobs moving into a cliff from the bottom side will simply bump into it and be denied moving into the tile,
+where as mobs moving into a cliff from the top side will 'fall' off the cliff, forcing them to the bottom, causing significant damage and stunning them.
+
+Mobs can climb this while wearing climbing equipment by clickdragging themselves onto a cliff, as if it were a table.
+
+Flying mobs can pass over all cliffs with no risk of falling.
+
+Projectiles and thrown objects can pass, however if moving upwards, there is a chance for it to be stopped by the cliff.
+This makes fighting something that is on top of a cliff more challenging.
+
+As a note, dir points upwards, e.g. pointing WEST means the left side is 'up', and the right side is 'down'.
+
+When mapping these in, be sure to give at least a one tile clearance, as NORTH facing cliffs expand to
+two tiles on initialization, and which way a cliff is facing may change during maploading.
+*/
+
+/obj/structure/cliff
+	name = "cliff"
+	desc = "A steep rock ledge. You might be able to climb it if you feel bold enough."
+	description_info = "Walking off the edge of a cliff while on top will cause you to fall off, causing severe injury.<br>\
+	You can climb this cliff if wearing special climbing equipment, by click-dragging yourself onto the cliff.<br>\
+	Projectiles traveling up a cliff may hit the cliff instead, making it more difficult to fight something \
+	on top."
+	icon = 'icons/obj/flora/rocks.dmi'
+
+	anchored = TRUE
+	density = TRUE
+	opacity = FALSE
+	climbable = TRUE
+	climb_delay = 10 SECONDS
+	block_turf_edges = TRUE // Don't want turf edges popping up from the cliff edge.
+	register_as_dangerous_object = TRUE
+
+	var/icon_variant = null // Used to make cliffs less repeative by having a selection of sprites to display.
+	var/corner = FALSE // Used for icon things.
+	var/ramp = FALSE // Ditto.
+	var/bottom = FALSE // Used for 'bottom' typed cliffs, to avoid infinite cliffs, and for icons.
+
+	var/is_double_cliff = FALSE // Set to true when making the two-tile cliffs, used for projectile checks.
+	var/uphill_penalty = 30 // Odds of a projectile not making it up the cliff.
+
+// These arrange their sprites at runtime, as opposed to being statically placed in the map file.
+/obj/structure/cliff/automatic
+	icon_state = "cliffbuilder"
+	dir = NORTH
+
+/obj/structure/cliff/automatic/corner
+	icon_state = "cliffbuilder-corner"
+	dir = NORTHEAST
+	corner = TRUE
+
+// Tiny part that doesn't block, used for making 'ramps'.
+/obj/structure/cliff/automatic/ramp
+	icon_state = "cliffbuilder-ramp"
+	dir = NORTHEAST
+	density = FALSE
+	ramp = TRUE
+
+// Made automatically as needed by automatic cliffs.
+/obj/structure/cliff/bottom
+	bottom = TRUE
+
+/obj/structure/cliff/automatic/Initialize()
+	..()
+	return INITIALIZE_HINT_LATELOAD
+
+// Paranoid about the maploader, direction is very important to cliffs, since they may get bigger if initialized while facing NORTH.
+/obj/structure/cliff/automatic/LateInitialize()
+	if(dir in GLOB.cardinal)
+		icon_variant = pick("a", "b", "c")
+
+	if(dir & NORTH && !bottom) // North-facing cliffs require more cliffs to be made.
+		make_bottom()
+
+	update_icon()
+
+/obj/structure/cliff/proc/make_bottom()
+	// First, make sure there's room to put the bottom side.
+	var/turf/T = locate(x, y - 1, z)
+	if(!istype(T))
+		return FALSE
+
+	// Now make the bottom cliff have mostly the same variables.
+	var/obj/structure/cliff/bottom/bottom = new(T)
+	is_double_cliff = TRUE
+	climb_delay /= 2 // Since there are two cliffs to climb when going north, both take half the time.
+
+	bottom.dir = dir
+	bottom.is_double_cliff = TRUE
+	bottom.climb_delay = climb_delay
+	bottom.icon_variant = icon_variant
+	bottom.corner = corner
+	bottom.ramp = ramp
+	bottom.layer = layer - 0.1
+	bottom.density = density
+	bottom.update_icon()
+
+/obj/structure/cliff/set_dir(new_dir)
+	..()
+	update_icon()
+
+/obj/structure/cliff/update_icon()
+	icon_state = "cliff-[dir][icon_variant][bottom ? "-bottom" : ""][corner ? "-corner" : ""][ramp ? "-ramp" : ""]"
+
+	// Now for making the top-side look like a different turf.
+	var/turf/T = get_step(src, dir)
+	if(!istype(T))
+		return
+
+	var/subtraction_icon_state = "[icon_state]-subtract"
+	var/cache_string = "[icon_state]_[T.icon]_[T.icon_state]"
+	if(T && subtraction_icon_state in icon_states(icon))
+		cut_overlays()
+		// If we've made the same icon before, just recycle it.
+		if(cache_string in GLOB.cliff_icon_cache)
+			add_overlay(GLOB.cliff_icon_cache[cache_string])
+
+		else // Otherwise make a new one, but only once.
+			var/icon/underlying_ground = icon(T.icon, T.icon_state, T.dir)
+			var/icon/subtract = icon(icon, subtraction_icon_state)
+			underlying_ground.Blend(subtract, ICON_SUBTRACT)
+			var/image/final = image(underlying_ground)
+			final.layer = src.layer - 0.2
+			GLOB.cliff_icon_cache[cache_string] = final
+			add_overlay(final)
+
+
+// Movement-related code.
+
+/obj/structure/cliff/CanPass(atom/movable/mover, turf/target, height = 0, air_group = 0)
+	if(air_group || height == 0)
+		return TRUE // Airflow can always pass.
+
+	else if(isliving(mover))
+		var/mob/living/L = mover
+		if(L.hovering) // Flying mobs can always pass.
+			return TRUE
+		return ..()
+
+	// Projectiles and objects flying 'upward' have a chance to hit the cliff instead, wasting the shot.
+	else if(istype(mover, /obj))
+		var/obj/O = mover
+		if(check_shield_arc(src, dir, O)) // This is actually for mobs but it will work for our purposes as well.
+			if(prob(uphill_penalty / (1 + is_double_cliff) )) // Firing upwards facing NORTH means it will likely have to pass through two cliffs, so the chance is halved.
+				return FALSE
+		return TRUE
+
+/obj/structure/cliff/Bumped(atom/A)
+	if(isliving(A))
+		var/mob/living/L = A
+		if(should_fall(L))
+			fall_off_cliff(L)
+			return
+	..()
+
+/obj/structure/cliff/proc/should_fall(mob/living/L)
+	if(L.hovering)
+		return FALSE
+
+	var/turf/T = get_turf(L)
+	if(T && get_dir(T, loc) & reverse_dir[dir]) // dir points 'up' the cliff, e.g. cliff pointing NORTH will cause someone to fall if moving SOUTH into it.
+		return TRUE
+	return FALSE
+
+/obj/structure/cliff/proc/fall_off_cliff(mob/living/L)
+	if(!istype(L))
+		return FALSE
+	var/turf/T = get_step(src, reverse_dir[dir])
+	var/displaced = FALSE
+
+	if(dir in list(EAST, WEST)) // Apply an offset if flying sideways, to help maintain the illusion of depth.
+		for(var/i = 1 to 2)
+			var/turf/new_T = locate(T.x, T.y - i, T.z)
+			if(!new_T || locate(/obj/structure/cliff) in new_T)
+				break
+			T = new_T
+			displaced = TRUE
+
+	if(istype(T))
+		visible_message(span("danger", "\The [L] falls off \the [src]!"))
+		L.forceMove(T)
+
+		// Do the actual hurting. Double cliffs do halved damage due to them most likely hitting twice.
+		var/harm = !is_double_cliff ? 1 : 0.5
+		if(istype(L.buckled, /obj/vehicle)) // People falling off in vehicles will take less damage, but will damage the vehicle severely.
+			var/obj/vehicle/vehicle = L.buckled
+			vehicle.adjust_health(40 * harm)
+			to_chat(L, span("warning", "\The [vehicle] absorbs some of the impact, damaging it."))
+			harm /= 2
+
+		playsound(L, 'sound/effects/break_stone.ogg', 70, 1)
+		L.Weaken(5 * harm)
+		var/fall_time = 3
+		if(displaced) // Make the fall look more natural when falling sideways.
+			L.pixel_z = 32 * 2
+			animate(L, pixel_z = 0, time = fall_time)
+		sleep(fall_time) // A brief delay inbetween the two sounds helps sell the 'ouch' effect.
+		playsound(L, "punch", 70, 1)
+		shake_camera(L, 1, 1)
+		visible_message(span("danger", "\The [L] hits the ground!"))
+
+		// The bigger they are, the harder they fall.
+		// They will take at least 20 damage at the minimum, and tries to scale up to 40% of their max health.
+		// This scaling is capped at 100 total damage, which occurs if the thing that fell has more than 250 health.
+		var/damage = between(20, L.getMaxHealth() * 0.4, 100)
+		var/target_zone = ran_zone()
+		var/blocked = L.run_armor_check(target_zone, "melee") * harm
+		var/soaked = L.get_armor_soak(target_zone, "melee") * harm
+
+		L.apply_damage(damage * harm, BRUTE, target_zone, blocked, soaked, used_weapon=src)
+
+		// Now fall off more cliffs below this one if they exist.
+		var/obj/structure/cliff/bottom_cliff = locate() in T
+		if(bottom_cliff)
+			visible_message(span("danger", "\The [L] rolls down towards \the [bottom_cliff]!"))
+			sleep(5)
+			bottom_cliff.fall_off_cliff(L)
+
+/obj/structure/cliff/can_climb(mob/living/user, post_climb_check = FALSE)
+	// Cliff climbing requires climbing gear.
+	if(ishuman(user))
+		var/mob/living/carbon/human/H = user
+		var/obj/item/clothing/shoes/shoes = H.shoes
+		if(shoes && shoes.rock_climbing)
+			return ..() // Do the other checks too.
+
+	to_chat(user, span("warning", "\The [src] is too steep to climb unassisted."))
+	return FALSE
+
+// This tells AI mobs to not be dumb and step off cliffs willingly.
+/obj/structure/cliff/is_safe_to_step(mob/living/L)
+	if(should_fall(L))
+		return FALSE
+	return ..()

code/game/objects/structures/fence.dm

@@ -0,0 +1,179 @@
+//Chain link fences
+//Sprites ported from /VG/
+
+#define CUT_TIME 10 SECONDS
+#define CLIMB_TIME 5 SECONDS
+
+#define NO_HOLE 0 //section is intact
+#define MEDIUM_HOLE 1 //medium hole in the section - can climb through
+#define LARGE_HOLE 2 //large hole in the section - can walk through
+#define MAX_HOLE_SIZE LARGE_HOLE
+
+/obj/structure/fence
+	name = "fence"
+	desc = "A chain link fence. Not as effective as a wall, but generally it keeps people out."
+	description_info = "Projectiles can freely pass fences."
+	density = TRUE
+	anchored = TRUE
+
+	icon = 'icons/obj/fence.dmi'
+	icon_state = "straight"
+
+	var/cuttable = TRUE
+	var/hole_size= NO_HOLE
+	var/invulnerable = FALSE
+
+/obj/structure/fence/Initialize()
+	update_cut_status()
+	return ..()
+
+/obj/structure/fence/examine(mob/user)
+	. = ..()
+
+	switch(hole_size)
+		if(MEDIUM_HOLE)
+			user.show_message("There is a large hole in \the [src].")
+		if(LARGE_HOLE)
+			user.show_message("\The [src] has been completely cut through.")
+
+/obj/structure/fence/get_description_interaction()
+	var/list/results = list()
+	if(cuttable && !invulnerable && hole_size < MAX_HOLE_SIZE)
+		results += "[desc_panel_image("wirecutters")]to [hole_size > NO_HOLE ? "expand the":"cut a"] hole into the fence, allowing passage."
+	return results
+
+/obj/structure/fence/end
+	icon_state = "end"
+	cuttable = FALSE
+
+/obj/structure/fence/corner
+	icon_state = "corner"
+	cuttable = FALSE
+
+/obj/structure/fence/post
+	icon_state = "post"
+	cuttable = FALSE
+
+/obj/structure/fence/cut/medium
+	icon_state = "straight_cut2"
+	hole_size = MEDIUM_HOLE
+
+/obj/structure/fence/cut/large
+	icon_state = "straight_cut3"
+	hole_size = LARGE_HOLE
+
+// Projectiles can pass through fences.
+/obj/structure/fence/CanPass(atom/movable/mover, turf/target, height = 0, air_group = 0)
+	if(istype(mover, /obj/item/projectile))
+		return TRUE
+	return ..()
+
+/obj/structure/fence/attackby(obj/item/W, mob/user)
+	if(W.is_wirecutter())
+		if(!cuttable)
+			to_chat(user, span("warning", "This section of the fence can't be cut."))
+			return
+		if(invulnerable)
+			to_chat(user, span("warning", "This fence is too strong to cut through."))
+			return
+		var/current_stage = hole_size
+		if(current_stage >= MAX_HOLE_SIZE)
+			to_chat(user, span("notice", "This fence has too much cut out of it already."))
+			return
+
+		user.visible_message(span("danger", "\The [user] starts cutting through \the [src] with \the [W]."),\
+		span("danger", "You start cutting through \the [src] with \the [W]."))
+		playsound(src, W.usesound, 50, 1)
+
+		if(do_after(user, CUT_TIME * W.toolspeed, target = src))
+			if(current_stage == hole_size)
+				switch(++hole_size)
+					if(MEDIUM_HOLE)
+						visible_message(span("notice", "\The [user] cuts into \the [src] some more."))
+						to_chat(user, span("notice", "You could probably fit yourself through that hole now. Although climbing through would be much faster if you made it even bigger."))
+						climbable = TRUE
+					if(LARGE_HOLE)
+						visible_message(span("notice", "\The [user] completely cuts through \the [src]."))
+						to_chat(user, span("notice", "The hole in \the [src] is now big enough to walk through."))
+						climbable = FALSE
+				update_cut_status()
+	return TRUE
+
+/obj/structure/fence/proc/update_cut_status()
+	if(!cuttable)
+		return
+	density = TRUE
+
+	switch(hole_size)
+		if(NO_HOLE)
+			icon_state = initial(icon_state)
+		if(MEDIUM_HOLE)
+			icon_state = "straight_cut2"
+		if(LARGE_HOLE)
+			icon_state = "straight_cut3"
+			density = FALSE
+
+//FENCE DOORS
+
+/obj/structure/fence/door
+	name = "fence door"
+	desc = "Not very useful without a real lock."
+	icon_state = "door_closed"
+	cuttable = FALSE
+	var/open = FALSE
+	var/locked = FALSE
+
+/obj/structure/fence/door/Initialize()
+	update_door_status()
+	return ..()
+
+/obj/structure/fence/door/opened
+	icon_state = "door_opened"
+	open = TRUE
+	density = TRUE
+
+/obj/structure/fence/door/locked
+	desc = "It looks like it has a strong padlock attached."
+	locked = TRUE
+
+/obj/structure/fence/door/attack_hand(mob/user)
+	if(can_open(user))
+		toggle(user)
+	else
+		to_chat(user, span("warning", "\The [src] is [!open ? "locked" : "stuck open"]."))
+
+	return TRUE
+
+/obj/structure/fence/door/proc/toggle(mob/user)
+	switch(open)
+		if(FALSE)
+			visible_message(span("notice", "\The [user] opens \the [src]."))
+			open = TRUE
+		if(TRUE)
+			visible_message(span("notice", "\The [user] closes \the [src]."))
+			open = FALSE
+
+	update_door_status()
+	playsound(src, 'sound/machines/click.ogg', 100, 1)
+
+/obj/structure/fence/door/proc/update_door_status()
+	switch(open)
+		if(FALSE)
+			density = TRUE
+			icon_state = "door_closed"
+		if(TRUE)
+			density = FALSE
+			icon_state = "door_opened"
+
+/obj/structure/fence/door/proc/can_open(mob/user)
+	if(locked)
+		return FALSE
+	return TRUE
+
+#undef CUT_TIME
+#undef CLIMB_TIME
+
+#undef NO_HOLE
+#undef MEDIUM_HOLE
+#undef LARGE_HOLE
+#undef MAX_HOLE_SIZE

code/game/objects/structures/signs.dm

@@ -238,6 +238,18 @@
 	name = "\improper EMERGENT INTELLIGENCE DETAILS"
 	icon_state = "rogueai"
 
+/obj/structure/sign/warning/falling
+	name = "\improper FALL HAZARD"
+	icon_state = "falling"
+
+/obj/structure/sign/warning/lava
+	name = "\improper MOLTEN SURFACE"
+	icon_state = "lava"
+
+/obj/structure/sign/warning/acid
+	name = "\improper ACIDIC SURFACE"
+	icon_state = "acid"
+
 /obj/structure/sign/redcross
 	name = "medbay"
 	desc = "The Intergalactic symbol of Medical institutions. You'll probably get help here."

code/game/turfs/simulated/lava.dm

@@ -0,0 +1,91 @@
+/turf/simulated/floor/lava
+	name = "lava"
+	desc = "A pool of molten rock."
+	description_info = "Molten rock is extremly dangerous, as it will cause massive harm to anything that touches it.<br>\
+	A firesuit cannot fully protect from contact with molten rock."
+	gender = PLURAL // So it says "That's some lava." on examine.
+	icon = 'icons/turf/outdoors.dmi'
+	icon_state = "lava"
+	edge_blending_priority = -1
+	light_range = 2
+	light_power = 0.75
+	light_color = LIGHT_COLOR_LAVA
+	movement_cost = 2
+	can_build_into_floor = TRUE
+	can_dirty = FALSE
+
+/turf/simulated/floor/lava/outdoors
+	outdoors = TRUE
+
+// For maximum pedantry.
+/turf/simulated/floor/lava/Initialize()
+	if(!outdoors)
+		name = "magma"
+	update_icon()
+	return ..()
+
+/turf/simulated/floor/lava/make_outdoors()
+	..()
+	name = "lava"
+
+/turf/simulated/floor/lava/make_indoors()
+	..()
+	name = "magma"
+
+/turf/simulated/floor/lava/update_icon()
+	cut_overlays()
+	..()
+	update_icon_edge()
+
+/turf/simulated/floor/lava/Entered(atom/movable/AM)
+	if(burn_stuff(AM))
+		START_PROCESSING(SSobj, src)
+
+/turf/simulated/floor/lava/hitby(atom/movable/AM)
+	if(burn_stuff(AM))
+		START_PROCESSING(SSobj, src)
+
+/turf/simulated/floor/lava/process()
+	if(!burn_stuff())
+		STOP_PROCESSING(SSobj, src)
+
+/turf/simulated/floor/lava/proc/is_safe()
+	//if anything matching this typecache is found in the lava, we don't burn things
+	var/static/list/lava_safeties_typecache = typecacheof(list(/obj/structure/catwalk))
+	var/list/found_safeties = typecache_filter_list(contents, lava_safeties_typecache)
+	return LAZYLEN(found_safeties)
+
+/turf/simulated/floor/lava/proc/burn_stuff(atom/movable/AM)
+	. = FALSE
+
+	if(is_safe())
+		return FALSE
+
+	var/thing_to_check = src
+	if(AM)
+		thing_to_check = list(AM)
+
+	for(var/thing in thing_to_check)
+		if(isobj(thing))
+			var/obj/O = thing
+			if(O.throwing)
+				continue
+			. = TRUE
+			O.lava_act()
+
+		else if(isliving(thing))
+			var/mob/living/L = thing
+			if(L.hovering || L.throwing) // Flying over the lava. We're just gonna pretend convection doesn't exist.
+				continue
+			. = TRUE
+			L.lava_act()
+
+// Lava that does nothing at all.
+/turf/simulated/floor/lava/harmless/burn_stuff(atom/movable/AM)
+	return FALSE
+
+// Tells AI mobs to not suicide by pathing into lava if it would hurt them.
+/turf/simulated/floor/lava/is_safe_to_enter(mob/living/L)
+	if(!is_safe() && !L.hovering)
+		return FALSE
+	return ..()

code/game/turfs/simulated/outdoors/grass.dm

@@ -30,7 +30,7 @@ var/list/grass_types = list(
 		)
 
 /turf/simulated/floor/outdoors/grass/sif/Initialize()
-	if(tree_chance && prob(tree_chance))
+	if(tree_chance && prob(tree_chance) && !check_density())
 		new /obj/structure/flora/tree/sif(src)
 	. = ..()
 
@@ -39,7 +39,7 @@ var/list/grass_types = list(
 		icon_state = "[initial(icon_state)]2"
 		//edge_blending_priority++
 
-	if(grass_chance && prob(grass_chance))
+	if(grass_chance && prob(grass_chance) && !check_density())
 		var/grass_type = pick(grass_types)
 		new grass_type(src)
 	. = ..()

code/game/turfs/simulated/outdoors/outdoors.dm

@@ -51,10 +51,10 @@ var/list/turf_edge_cache = list()
 		make_indoors()
 
 /turf/simulated/proc/update_icon_edge()
-	if(edge_blending_priority)
+	if(edge_blending_priority && !forbid_turf_edge())
 		for(var/checkdir in cardinal)
 			var/turf/simulated/T = get_step(src, checkdir)
-			if(istype(T) && T.edge_blending_priority && edge_blending_priority < T.edge_blending_priority && icon_state != T.icon_state)
+			if(istype(T) && T.edge_blending_priority && edge_blending_priority < T.edge_blending_priority && icon_state != T.icon_state && !T.forbid_turf_edge())
 				var/cache_key = "[T.get_edge_icon_state()]-[checkdir]"
 				if(!turf_edge_cache[cache_key])
 					var/image/I = image(icon = 'icons/turf/outdoors_edge.dmi', icon_state = "[T.get_edge_icon_state()]-edge", dir = checkdir, layer = ABOVE_TURF_LAYER)
@@ -65,6 +65,14 @@ var/list/turf_edge_cache = list()
 /turf/simulated/proc/get_edge_icon_state()
 	return icon_state
 
+// Tests if we shouldn't apply a turf edge.
+// Returns the blocker if one exists.
+/turf/simulated/proc/forbid_turf_edge()
+	for(var/obj/structure/S in contents)
+		if(S.block_turf_edges)
+			return S
+	return null
+
 /turf/simulated/floor/outdoors/update_icon()
 	..()
 	update_icon_edge()
@@ -80,6 +88,8 @@ var/list/turf_edge_cache = list()
 	icon_state = "rock"
 	edge_blending_priority = 1
 
+/turf/simulated/floor/outdoors/rocks/caves
+	outdoors = FALSE
 
 // This proc adds a 'layer' on top of the turf.
 /turf/simulated/floor/outdoors/proc/promote(var/new_turf_type)

code/game/turfs/simulated/water.dm

@@ -108,6 +108,8 @@
 		return 0
 	if(hovering)
 		return 0
+	if(locate(/obj/structure/catwalk) in loc)
+		return 0
 	var/turf/simulated/floor/water/T = loc
 	if(istype(T))
 		return T.depth

code/game/turfs/turf.dm

@@ -32,6 +32,7 @@
 
 	var/block_tele = FALSE      // If true, most forms of teleporting to or from this turf tile will fail.
 	var/can_build_into_floor = FALSE // Used for things like RCDs (and maybe lattices/floor tiles in the future), to see if a floor should replace it.
+	var/list/dangerous_objects // List of 'dangerous' objs that the turf holds that can cause something bad to happen when stepped on, used for AI mobs.
 
 /turf/New()
 	..()
@@ -319,8 +320,28 @@ var/const/enterloopsanity = 100
 
 // Returns false if stepping into a tile would cause harm (e.g. open space while unable to fly, water tile while a slime, lava, etc).
 /turf/proc/is_safe_to_enter(mob/living/L)
+	if(LAZYLEN(dangerous_objects))
+		for(var/obj/O in dangerous_objects)
+			if(!O.is_safe_to_step(L))
+				return FALSE
 	return TRUE
 
+// Tells the turf that it currently contains something that automated movement should consider if planning to enter the tile.
+// This uses lazy list macros to reduce memory footprint, since for 99% of turfs the list would've been empty anyways.
+/turf/proc/register_dangerous_object(obj/O)
+	if(!istype(O))
+		return FALSE
+	LAZYADD(dangerous_objects, O)
+//	color = "#FF0000"
+
+// Similar to above, for when the dangerous object stops being dangerous/gets deleted/moved/etc.
+/turf/proc/unregister_dangerous_object(obj/O)
+	if(!istype(O))
+		return FALSE
+	LAZYREMOVE(dangerous_objects, O)
+	UNSETEMPTY(dangerous_objects) // This nulls the list var if it's empty.
+//	color = "#00FF00"
+
 // This is all the way up here since its the common ancestor for things that need to get replaced with a floor when an RCD is used on them.
 // More specialized turfs like walls should instead override this.
 // The code for applying lattices/floor tiles onto lattices could also utilize something similar in the future.

code/game/turfs/turf_changing.dm

@@ -38,6 +38,7 @@
 	var/old_lighting_overlay = lighting_overlay
 	var/old_corners = corners
 	var/old_outdoors = outdoors
+	var/old_dangerous_objects = dangerous_objects
 
 	//world << "Replacing [src.type] with [N]"
 
@@ -95,6 +96,8 @@
 
 	recalc_atom_opacity()
 
+	dangerous_objects = old_dangerous_objects
+
 	if(lighting_overlays_initialised)
 		lighting_overlay = old_lighting_overlay
 		affecting_lights = old_affecting_lights

code/modules/clothing/clothing.dm

@@ -473,6 +473,7 @@
 
 	var/water_speed = 0		//Speed boost/decrease in water, lower/negative values mean more speed
 	var/snow_speed = 0		//Speed boost/decrease on snow, lower/negative values mean more speed
+	var/rock_climbing = FALSE // If true, allows climbing cliffs with clickdrag.
 
 	var/step_volume_mod = 1	//How quiet or loud footsteps in this shoe are
 

code/modules/clothing/shoes/boots.dm

@@ -114,6 +114,13 @@
 	icon_state = "explorer"
 	armor = list(melee = 30, bullet = 10, laser = 10, energy = 15, bomb = 20, bio = 0, rad = 0)
 
+// Allows the wearer to climb cliffs, which could allow for shortcuts or sequence-breaking.
+/obj/item/clothing/shoes/boots/winter/climbing
+	name = "climbing winter boots"
+	desc = "A pair of winter boots, with metal bracing attached to assist in climbing rocky terrain."
+	icon_state = "climbing_boots"
+	rock_climbing = TRUE
+
 /obj/item/clothing/shoes/boots/tactical
 	name = "tactical boots"
 	desc = "Tan boots with extra padding and armor."

code/modules/mob/_modifiers/modifiers_misc.dm

@@ -213,6 +213,10 @@ the artifact triggers the rage.
 	stacks = MODIFIER_STACK_ALLOWED // Multiple instances will hurt a lot.
 	var/damage_per_tick = 5
 
+/datum/modifier/fire/intense
+	mob_overlay_state = "on_fire_intense"
+	damage_per_tick = 10
+
 /datum/modifier/fire/tick()
 	holder.inflict_heat_damage(damage_per_tick)
 

code/modules/mob/living/living_defense.dm

@@ -452,6 +452,13 @@
 	emp_act(1)
 	to_chat(src, span("critical", "You've been struck by lightning!"))
 
+// Called when touching a lava tile.
+// Does roughly 100 damage to unprotected mobs, and 20 to fully protected mobs.
+/mob/living/lava_act()
+	add_modifier(/datum/modifier/fire/intense, 8 SECONDS) // Around 40 total if left to burn and without fire protection per stack.
+	inflict_heat_damage(40) // Another 40, however this is instantly applied to unprotected mobs.
+	adjustFireLoss(20) // Lava cannot be 100% resisted with fire protection.
+
 /mob/living/proc/reagent_permeability()
 	return 1
 	return round(FIRESUIT_MAX_HEAT_PROTECTION_TEMPERATURE*(fire_stacks/FIRE_MAX_FIRESUIT_STACKS)**2)

code/modules/mob/living/simple_mob/defense.dm

@@ -216,6 +216,17 @@
 			ash()
 			return // No point deafening something that wont exist.
 
+// Lava
+/mob/living/simple_mob/lava_act()
+	..()
+	// Similar to lightning, the mob is turned to ash if the lava tick was fatal and it isn't a player.
+	// Unlike lightning, we don't add an additional damage spike (since lava already hurts a lot).
+	if(!client)
+		updatehealth()
+		if(health <= 0)
+			visible_message(span("critical", "\The [src] flashes into ash as the lava consumes them!"))
+			ash()
+
 // Injections.
 /mob/living/simple_mob/can_inject(mob/user, error_msg, target_zone, ignore_thickness)
 	if(ignore_thickness)

code/modules/vehicles/vehicle.dm

@@ -164,6 +164,10 @@
 	..()
 	healthcheck()
 
+/obj/vehicle/proc/adjust_health(amount)
+	health = between(0, health + amount, maxhealth)
+	healthcheck()
+
 /obj/vehicle/ex_act(severity)
 	switch(severity)
 		if(1.0)

code/modules/xenoarcheaology/finds/misc.dm

@@ -3,13 +3,18 @@
 
 //legacy crystal
 /obj/machinery/crystal
-	name = "Crystal"
+	name = "crystal"
+	desc = "A shiny looking crystal formation."
 	icon = 'icons/obj/mining.dmi'
 	icon_state = "crystal"
 	density = TRUE
 	anchored = TRUE
 
-/obj/machinery/crystal/New()
+/obj/machinery/crystal/Initialize()
+	randomize_color()
+	return ..()
+
+/obj/machinery/crystal/proc/randomize_color()
 	if(prob(30))
 		icon_state = "crystal2"
 		set_light(3, 3, "#CC00CC")
@@ -21,18 +26,25 @@
 	desc = "A large crystalline ice formation."
 	icon_state = "icecrystal2"
 
-/obj/machinery/crystal/ice/New()
-	if(prob(10))
-		icon_state = "crystal"
-		set_light(5, 5, "#33CC33")
-	if(prob(10))
-		icon_state = "crystal2"
-		set_light(5, 5, "#CC00CC")
+/obj/machinery/crystal/ice/randomize_color()
 	if(prob(30))
 		icon_state = "icecrystal1"
-		set_light(5, 5, "#C4FFFF")
-	else
-		set_light(5, 5, "#C4FFFF")
+	set_light(3, 3, "#C4FFFF")
+
+/obj/machinery/crystal/lava
+	name = "lava crystal"
+	desc = "A large crystalline formation found near extreme heat."
+	icon_state = "grey_crystal"
+	color = "#FCCF64"
+
+/obj/machinery/crystal/lava/randomize_color()
+	if(prob(50))
+		icon_state = "grey_crystal2"
+
+	if(prob(30))
+		color = "#E03131"
+
+	set_light(3, 3, color)
 
 //large finds
 				/*

maps/plane/plane-1.dmm

@@ -1,71 +1,71 @@
-"a" = (/turf/unsimulated/wall/planetary/sif,/area/plane_ground)
-"b" = (/turf/simulated/floor/outdoors/dirt,/area/plane_ground)
-"c" = (/obj/effect/landmark/start,/turf/simulated/floor/outdoors/dirt,/area/plane_ground)
-"d" = (/obj/effect/landmark{name = "JoinLate"},/turf/simulated/floor/outdoors/dirt,/area/plane_ground)
-
-(1,1,1) = {"
-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
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-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbdddbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbdddbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbdddbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
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-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
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-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
-"}
+"a" = (/turf/unsimulated/wall/planetary/sif,/area/plane_ground)
+"b" = (/turf/simulated/floor/outdoors/dirt,/area/plane_ground)
+"c" = (/obj/effect/landmark{name = "JoinLate"},/turf/simulated/floor/outdoors/dirt,/area/plane_ground)
+"d" = (/obj/effect/landmark/start,/turf/simulated/floor/outdoors/dirt,/area/plane_ground)
+
+(1,1,1) = {"
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
+abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
+abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
+abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
+abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba
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+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+"}

maps/southern_cross/southern_cross_defines.dm

@@ -213,46 +213,49 @@
 	teleport_y = world.maxy - 1
 	teleport_z = Z_LEVEL_SURFACE_MINE
 
+/datum/planet/sif
+	expected_z_levels = list(
+		Z_LEVEL_SURFACE,
+		Z_LEVEL_SURFACE_MINE,
+		Z_LEVEL_SURFACE_WILD,
+		Z_LEVEL_TRANSIT
+	)
 
-/obj/effect/step_trigger/teleporter/bridge/east_to_west/New()
-	..()
+/obj/effect/step_trigger/teleporter/bridge/east_to_west/Initialize()
 	teleport_x = src.x - 4
 	teleport_y = src.y
 	teleport_z = src.z
+	return ..()
 
-/obj/effect/step_trigger/teleporter/bridge/east_to_west/small/New()
-	..()
+/obj/effect/step_trigger/teleporter/bridge/east_to_west/small/Initialize()
 	teleport_x = src.x - 3
 	teleport_y = src.y
 	teleport_z = src.z
+	return ..()
 
-
-/obj/effect/step_trigger/teleporter/bridge/west_to_east/New()
-	..()
+/obj/effect/step_trigger/teleporter/bridge/west_to_east/Initialize()
 	teleport_x = src.x + 4
 	teleport_y = src.y
 	teleport_z = src.z
+	return ..()
 
-/obj/effect/step_trigger/teleporter/bridge/west_to_east/small/New()
-	..()
+/obj/effect/step_trigger/teleporter/bridge/west_to_east/small/Initialize()
 	teleport_x = src.x + 3
 	teleport_y = src.y
 	teleport_z = src.z
+	return ..()
 
-
-/obj/effect/step_trigger/teleporter/bridge/north_to_south/New()
-	..()
+/obj/effect/step_trigger/teleporter/bridge/north_to_south/Initialize()
 	teleport_x = src.x
 	teleport_y = src.y - 4
 	teleport_z = src.z
+	return ..()
 
-
-/obj/effect/step_trigger/teleporter/bridge/south_to_north/New()
-	..()
+/obj/effect/step_trigger/teleporter/bridge/south_to_north/Initialize()
 	teleport_x = src.x
 	teleport_y = src.y + 4
 	teleport_z = src.z
-
+	return ..()
 
 /datum/planet/sif
 	expected_z_levels = list(

maps/submaps/surface_submaps/mountains/lava_trench.dmm

@@ -0,0 +1,146 @@
+"aa" = (/turf/template_noop,/area/template_noop)
+"ab" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 9},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ac" = (/obj/structure/cliff/automatic,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ad" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 5},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ae" = (/obj/structure/cliff/automatic/corner{icon_state = "cliffbuilder-corner"; dir = 9},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"af" = (/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ag" = (/obj/structure/cliff/automatic/corner,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ah" = (/obj/structure/fence/end{icon_state = "end"; dir = 4},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ai" = (/obj/structure/fence/post{icon_state = "post"; dir = 4},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"aj" = (/obj/structure/fence/door/opened,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ak" = (/obj/structure/fence/end{icon_state = "end"; dir = 8},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"al" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 8},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"am" = (/obj/structure/fence/end{icon_state = "end"; dir = 1},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"an" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 9},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"ao" = (/obj/structure/cliff/automatic,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"ap" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 5},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aq" = (/obj/structure/sign/warning/lava,/turf/simulated/wall,/area/submap/lava_trench)
+"ar" = (/obj/structure/fence/post,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"as" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 6},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"at" = (/obj/structure/cliff/automatic/corner{icon_state = "cliffbuilder-corner"; dir = 9},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"au" = (/turf/simulated/floor/lava,/area/submap/lava_trench)
+"av" = (/obj/structure/cliff/automatic/corner,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aw" = (/obj/structure/railing{icon_state = "railing0"; dir = 4},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ax" = (/obj/structure/catwalk,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"ay" = (/obj/structure/railing{icon_state = "railing0"; dir = 8},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"az" = (/obj/structure/fence/door/opened{icon_state = "door_opened"; dir = 8},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"aA" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 8},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aB" = (/turf/simulated/mineral/floor/ignore_mapgen,/area/template_noop)
+"aC" = (/turf/simulated/floor/outdoors/rocks/caves,/area/template_noop)
+"aD" = (/obj/structure/cliff/automatic,/obj/structure/railing{icon_state = "railing0"; dir = 4},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aE" = (/obj/structure/cliff/automatic,/obj/structure/railing{icon_state = "railing0"; dir = 8},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aF" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 10},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aG" = (/obj/structure/cliff/automatic/corner{icon_state = "cliffbuilder-corner"; dir = 10},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aH" = (/obj/structure/railing{icon_state = "railing0"; dir = 4},/obj/effect/step_trigger/teleporter/offset/east,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aI" = (/obj/structure/catwalk,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aJ" = (/obj/structure/ore_box,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"aK" = (/obj/structure/railing{icon_state = "railing0"; dir = 8},/obj/effect/step_trigger/teleporter/offset/west,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aL" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 4},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"aM" = (/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 4},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"aN" = (/obj/machinery/door/airlock/hatch{normalspeed = 0; safe = 0},/obj/effect/map_effect/interval/effect_emitter/sparks,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"aO" = (/turf/simulated/wall/rshull,/area/submap/lava_trench/outpost)
+"aP" = (/obj/machinery/door/airlock/hatch{normalspeed = 0; safe = 0},/obj/effect/map_effect/interval/effect_emitter/sparks,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"aQ" = (/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"aR" = (/obj/effect/floor_decal/corner_oldtile/blue/full{icon_state = "corner_oldtile_full"; dir = 8},/obj/machinery/microscope,/obj/structure/table/standard,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"aS" = (/obj/effect/floor_decal/corner_oldtile/blue/full{icon_state = "corner_oldtile_full"; dir = 8},/obj/structure/table/standard,/obj/random/unidentified_medicine/scientific,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"aT" = (/obj/structure/fence/end,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"aU" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 2},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aV" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 10},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"aW" = (/obj/structure/cliff/automatic/corner{icon_state = "cliffbuilder-corner"; dir = 10},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"aX" = (/obj/structure/cliff/automatic/corner{icon_state = "cliffbuilder-corner"; dir = 6},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aY" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 2},/obj/structure/railing{icon_state = "railing0"; dir = 4},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"aZ" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 2},/obj/structure/railing{icon_state = "railing0"; dir = 8},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"ba" = (/obj/machinery/crystal/lava,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bb" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 4},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bc" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 6},/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bd" = (/obj/structure/table/steel,/obj/item/weapon/storage/excavation,/obj/item/device/measuring_tape,/obj/effect/floor_decal/corner_oldtile/purple{icon_state = "corner_oldtile"; dir = 4},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"be" = (/turf/simulated/mineral/ignore_mapgen,/area/template_noop)
+"bf" = (/obj/structure/railing,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bg" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 10},/obj/structure/railing,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bh" = (/obj/structure/cliff/automatic/corner{icon_state = "cliffbuilder-corner"; dir = 10},/obj/structure/railing,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bi" = (/obj/structure/railing,/obj/effect/step_trigger/teleporter/offset/south,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bj" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 4},/obj/structure/railing,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bk" = (/obj/structure/catwalk,/obj/structure/railing,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bl" = (/obj/structure/catwalk,/obj/structure/railing,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bm" = (/obj/structure/fence/door/opened{icon_state = "door_opened"; dir = 4},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bn" = (/obj/structure/cliff/automatic{icon_state = "cliffbuilder"; dir = 2},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bo" = (/obj/effect/floor_decal/corner_oldtile/purple/full{icon_state = "corner_oldtile_full"; dir = 1},/obj/machinery/space_heater,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bp" = (/obj/machinery/floodlight,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bq" = (/obj/machinery/newscaster{pixel_y = 32},/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 1},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"br" = (/obj/effect/floor_decal/corner_oldtile/blue{icon_state = "corner_oldtile"; dir = 1},/obj/structure/bed/chair/office/light{icon_state = "officechair_white"; dir = 4},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bs" = (/turf/simulated/floor/tiled/old_tile/gray,/area/submap/lava_trench/outpost)
+"bt" = (/obj/effect/floor_decal/corner_oldtile/purple{icon_state = "corner_oldtile"; dir = 4},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bu" = (/obj/structure/cliff/automatic/corner{icon_state = "cliffbuilder-corner"; dir = 6},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bv" = (/obj/item/slime_crystal,/obj/item/slime_crystal,/obj/item/slime_crystal,/obj/effect/floor_decal/corner_oldtile/blue{icon_state = "corner_oldtile"; dir = 9},/obj/structure/table/standard,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bw" = (/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"bx" = (/obj/machinery/crystal/ice,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"by" = (/obj/machinery/ai_status_display{pixel_y = 32},/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 1},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bz" = (/obj/effect/floor_decal/corner_oldtile{icon_state = "corner_oldtile"; dir = 1},/turf/simulated/floor/tiled/old_tile/gray,/area/submap/lava_trench/outpost)
+"bA" = (/obj/effect/floor_decal/corner_oldtile{icon_state = "corner_oldtile"; dir = 4},/turf/simulated/floor/tiled/old_tile/gray,/area/submap/lava_trench/outpost)
+"bB" = (/obj/effect/floor_decal/corner_oldtile/blue{icon_state = "corner_oldtile"; dir = 8},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bC" = (/obj/structure/table/rack,/obj/item/weapon/shovel,/obj/effect/floor_decal/corner_oldtile/purple/full{icon_state = "corner_oldtile_full"; dir = 1},/obj/item/weapon/pickaxe/drill,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bD" = (/obj/effect/step_trigger/teleporter/offset/north,/turf/simulated/floor/lava,/area/submap/lava_trench)
+"bE" = (/obj/machinery/crystal/lava,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"bF" = (/obj/structure/table/rack,/obj/random/tool/powermaint,/obj/random/tool/powermaint,/obj/effect/floor_decal/corner_oldtile/purple{icon_state = "corner_oldtile"; dir = 6},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bG" = (/obj/effect/floor_decal/corner_oldtile/purple,/obj/structure/table/steel,/obj/item/device/xenoarch_multi_tool,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bH" = (/obj/effect/floor_decal/corner_oldtile/purple,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bI" = (/obj/item/device/gps/science{gps_tag = "CRYSTALS"},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bK" = (/obj/effect/floor_decal/corner_oldtile/blue/full,/obj/random/drinkbottle,/obj/random/maintenance/research,/obj/structure/table/standard,/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 8},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bL" = (/obj/structure/flora/pottedplant/crystal,/obj/effect/floor_decal/corner_oldtile/blue{icon_state = "corner_oldtile"; dir = 8},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bM" = (/obj/structure/cult/pylon,/obj/effect/floor_decal/industrial/outline,/turf/simulated/floor/tiled/old_tile/gray,/area/submap/lava_trench/outpost)
+"bN" = (/obj/structure/anomaly_container,/obj/machinery/artifact,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bO" = (/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 4},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bP" = (/obj/effect/floor_decal/corner_oldtile/purple/full{icon_state = "corner_oldtile_full"; dir = 4},/obj/structure/table/steel,/obj/machinery/recharger,/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 4},/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bQ" = (/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 8},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bR" = (/obj/machinery/light/small/flicker{icon_state = "bulb1"; dir = 1},/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bS" = (/obj/effect/floor_decal/corner_oldtile/blue{icon_state = "corner_oldtile"; dir = 1},/obj/structure/loot_pile/surface/medicine_cabinet{pixel_y = 28},/obj/structure/table/standard,/obj/item/device/healthanalyzer/improved,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bT" = (/obj/machinery/suspension_gen{anchored = 1},/obj/effect/floor_decal/industrial/hatch/yellow,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bU" = (/obj/machinery/light/small/flicker,/obj/structure/ore_box,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"bW" = (/obj/structure/anomaly_container,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"bX" = (/obj/effect/floor_decal/corner_oldtile/purple/full{icon_state = "corner_oldtile_full"; dir = 4},/obj/item/weapon/storage/box/samplebags,/obj/structure/table/steel,/obj/item/stack/flag/red,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"bY" = (/obj/machinery/crystal,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"bZ" = (/obj/structure/table/steel,/obj/item/weapon/stock_parts/subspace/crystal,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"ca" = (/obj/structure/table/steel,/obj/item/stack/material/diamond,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"cb" = (/obj/structure/loot_pile/surface/bones,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"ce" = (/obj/effect/floor_decal/corner_oldtile/blue/full,/obj/structure/table/standard,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"ch" = (/obj/structure/loot_pile/maint/trash,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+"cj" = (/obj/item/clothing/head/bio_hood/anomaly,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"ck" = (/obj/item/clothing/suit/bio_suit/anomaly,/turf/simulated/floor/tiled/old_tile,/area/submap/lava_trench/outpost)
+"co" = (/obj/machinery/floodlight,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"cp" = (/obj/machinery/light/small/flicker,/obj/structure/closet/crate/secure/loot,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"cq" = (/obj/item/weapon/banner/nt,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"cr" = (/obj/structure/table/steel,/obj/item/weapon/material/shard/phoron,/turf/simulated/floor/tiled/asteroid_steel,/area/submap/lava_trench)
+"cs" = (/obj/item/weapon/banner/nt,/turf/simulated/floor/outdoors/rocks/caves,/area/submap/lava_trench)
+
+(1,1,1) = {"
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+"}

maps/submaps/surface_submaps/mountains/mountains.dm

@@ -32,6 +32,7 @@
 #include "BlastMine1.dmm"
 #include "crashedcontainmentshuttle.dmm"
 #include "deadspy.dmm"
+#include "lava_trench.dmm"
 #endif
 
 // The 'mountains' is the mining z-level, and has a lot of caves.
@@ -272,3 +273,10 @@
 	desc = "An abandoned blast mining site, seems that local wildlife has moved in."
 	mappath = 'maps/submaps/surface_submaps/mountains/BlastMine1.dmm'
 	cost = 20
+
+/datum/map_template/surface/mountains/deep/lava_trench
+	name = "lava trench"
+	desc = "A long stretch of lava underground, almost river-like, with a small crystal research outpost on the side."
+	mappath = 'maps/submaps/surface_submaps/mountains/lava_trench.dmm'
+	cost = 20
+	fixed_orientation = TRUE

maps/submaps/surface_submaps/mountains/mountains_areas.dm

@@ -120,4 +120,13 @@
 
 /area/submap/deadspy
 	name = "Dead Spy"
-	ambience = AMBIENCE_FOREBODING
+	ambience = AMBIENCE_FOREBODING
+
+/area/submap/lava_trench
+	name = "Lava Trench"
+	ambience = AMBIENCE_LAVA
+
+/area/submap/lava_trench/outpost
+	name = "Trench Outpost"
+	requires_power = FALSE
+	icon_state = "submap2"

polaris.dme

@@ -1075,6 +1075,7 @@
 #include "code\game\objects\structures\bedsheet_bin.dm"
 #include "code\game\objects\structures\bonfire.dm"
 #include "code\game\objects\structures\catwalk.dm"
+#include "code\game\objects\structures\cliff.dm"
 #include "code\game\objects\structures\coathanger.dm"
 #include "code\game\objects\structures\curtains.dm"
 #include "code\game\objects\structures\displaycase.dm"
@@ -1082,6 +1083,7 @@
 #include "code\game\objects\structures\door_assembly.dm"
 #include "code\game\objects\structures\electricchair.dm"
 #include "code\game\objects\structures\extinguisher.dm"
+#include "code\game\objects\structures\fence.dm"
 #include "code\game\objects\structures\fitness.dm"
 #include "code\game\objects\structures\flora.dm"
 #include "code\game\objects\structures\girders.dm"
@@ -1174,6 +1176,7 @@
 #include "code\game\turfs\simulated\floor_icon.dm"
 #include "code\game\turfs\simulated\floor_static.dm"
 #include "code\game\turfs\simulated\floor_types.dm"
+#include "code\game\turfs\simulated\lava.dm"
 #include "code\game\turfs\simulated\wall_attacks.dm"
 #include "code\game\turfs\simulated\wall_icon.dm"
 #include "code\game\turfs\simulated\wall_types.dm"