diff --git a/baystation12.dme b/baystation12.dme
index f21151ee986..943b12ee783 100644
--- a/baystation12.dme
+++ b/baystation12.dme
@@ -191,7 +191,6 @@
 #include "code\game\atoms.dm"
 #include "code\game\atoms_movable.dm"
 #include "code\game\communications.dm"
-#include "code\game\mining_surprise.dm"
 #include "code\game\response_team.dm"
 #include "code\game\shuttle_engines.dm"
 #include "code\game\skincmd.dm"
@@ -933,9 +932,12 @@
 #include "code\modules\mining\money_bag.dm"
 #include "code\modules\mining\ores_coins.dm"
 #include "code\modules\mining\satchel_ore_boxdm.dm"
+#include "code\modules\mining\surprise.dm"
 #include "code\modules\mining\laborcamp\laborminerals.dm"
 #include "code\modules\mining\laborcamp\laborshuttle.dm"
 #include "code\modules\mining\laborcamp\laborstacker.dm"
+#include "code\modules\mining\surprises\tg.dm"
+#include "code\modules\mining\surprises\vg.dm"
 #include "code\modules\mob\abilities.dm"
 #include "code\modules\mob\death.dm"
 #include "code\modules\mob\emote.dm"
diff --git a/code/game/mining_surprise.dm b/code/game/mining_surprise.dm
deleted file mode 100644
index 0fa9dce0b3a..00000000000
--- a/code/game/mining_surprise.dm
+++ /dev/null
@@ -1,433 +0,0 @@
-#define CONTIGUOUS_WALLS  1
-#define CONTIGUOUS_FLOORS 2
-
-
-var/global/list/mining_surprises = typesof(/mining_surprise)-/mining_surprise
-
-/surprise_room
-	var/list/floors[0]
-	var/list/walls[0]
-
-	var/size_x=0
-	var/size_y=0
-
-/mining_surprise
-	var/name = "Hidden Complex"
-
-	//: Types of floor to use
-	var/list/floortypes[0]
-	var/list/walltypes[0]
-	var/list/spawntypes[0]
-	var/list/fluffitems[0]
-
-	var/max_richness=2
-
-	//: How many rooms?
-	var/complex_max_size=1
-
-	var/room_size_max=5
-
-	var/flags=0
-
-	var/list/rooms=list()
-	var/list/goodies=list()
-	var/list/candidates=list()
-
-	var/area/asteroid/artifactroom/complex_area
-
-	proc/spawn_complex(var/atom/start_loc)
-		name = "[initial(name)] #[rand(100,999)]"
-		complex_area = new
-		complex_area.name = name
-		var/atom/pos=start_loc
-		var/nrooms=complex_max_size
-		var/maxtries=50
-		var/l_size_x=0
-		var/l_size_y=0
-		while(nrooms && maxtries)
-			var/sx=rand(3,room_size_max)
-			var/sy=rand(3,room_size_max)
-			var/o_x=l_size_x?rand(0,l_size_x):0
-			var/o_y=l_size_y?rand(0,l_size_y):0
-			var/atom/npos
-			switch(pick(cardinal))
-				if(NORTH)
-					npos=locate(pos.x+o_x,  pos.y+sy-1, pos.z)
-				if(SOUTH)
-					npos=locate(pos.x+o_x,  pos.y-sy+1, pos.z)
-				if(WEST)
-					npos=locate(pos.x-sx-1, pos.y+o_y,  pos.z)
-				if(EAST)
-					npos=locate(pos.x+sx+1, pos.y+o_y,  pos.z)
-			if(spawn_room(npos,sx,sy,1))
-				pos=npos
-				l_size_x=sx
-				l_size_y=sy
-			else if(complex_max_size==nrooms)
-				// Failed to make first room, abort.
-				del(complex_area)
-				return 0
-			else
-				maxtries--
-				continue
-			nrooms--
-		postProcessComplex()
-		message_admins("Complex spawned at [formatJumpTo(start_loc)]")
-		return 1
-
-	proc/postProcessRoom(var/surprise_room/room)
-		for(var/turf/floor in room.floors)
-			for(var/turf/T in floor.AdjacentTurfs())
-				if(T in room.floors)
-					candidates|=T
-					break
-
-	proc/postProcessComplex()
-		for(var/i=0;i<=rand(1,max_richness);i++)
-			if(!candidates.len)
-				return
-			var/turf/T = pick(candidates)
-			var/thing = pickweight(spawntypes)
-			if(thing==null)
-				continue
-			new thing(T)
-			candidates -= T
-			message_admins("Goodie [thing] spawned at [formatJumpTo(T)]")
-
-		for(var/i=0;i<=rand(5,10);i++)
-			if(!candidates.len)
-				return
-			var/turf/T = pick(candidates)
-			var/thing = pickweight(fluffitems)
-			if(thing==null)
-				continue
-			new thing(T)
-
-	proc/spawn_room(var/atom/start_loc, var/x_size, var/y_size, var/clean=0)
-		if(!check_complex_placement(start_loc,x_size,y_size))
-			return 0
-
-		// If walls/floors are contiguous, pick them out.
-		var/wall_type
-		if(flags & CONTIGUOUS_WALLS)
-			wall_type = pickweight(walltypes)
-
-		var/floor_type
-		if(flags & CONTIGUOUS_FLOORS)
-			floor_type = pickweight(floortypes)
-
-
-		var/list/walls[0]
-		var/list/floors[0]
-		for(var/x = 0,x<x_size,x++)
-			for(var/y = 0,y<y_size,y++)
-				var/turf/cur_loc = locate(start_loc.x+x,start_loc.y+y,start_loc.z)
-
-				if(clean)
-					for(var/O in cur_loc)
-						qdel(O)
-
-				if(x == 0 || x==x_size-1 || y==0 || y==y_size-1)
-					walls |= cur_loc
-				else
-					floors |= cur_loc
-
-		var/surprise_room/room = new
-		for(var/turf/turf in walls)
-
-			if(!(flags & CONTIGUOUS_WALLS))
-				wall_type=pickweight(walltypes)
-
-			var/turf/T
-			if(dd_hasprefix("[wall_type]","/obj"))
-				if(!(flags & CONTIGUOUS_FLOORS))
-					floor_type=pickweight(floortypes)
-				T=new floor_type(turf)
-				new wall_type(T)
-			else
-				//testing("Creating wall of type [wall_type].")
-				T=new wall_type(turf)
-
-			room.walls += T
-			complex_area.contents += T
-
-		for(var/turf/turf in floors)
-			if(!(flags & CONTIGUOUS_FLOORS))
-				floor_type=pickweight(floortypes)
-
-			var/turf/T = new floor_type(turf)
-			room.floors += T
-			complex_area.contents += T
-
-		postProcessRoom(room)
-
-		rooms += room
-
-		message_admins("Room spawned at [formatJumpTo(start_loc)]")
-
-		return 1
-
-/mining_surprise/human
-	name="Hidden Complex"
-	floortypes = list(
-		/turf/simulated/floor/airless=95,
-		/turf/simulated/floor/plating/airless=5
-	)
-	walltypes = list(
-		/turf/simulated/wall=100
-	)
-	spawntypes = list(
-		/obj/item/weapon/pickaxe/silver					=4,
-		/obj/item/weapon/pickaxe/drill					=4,
-		/obj/item/weapon/pickaxe/jackhammer				=4,
-		/obj/item/weapon/pickaxe/diamond				=3,
-		/obj/item/weapon/pickaxe/diamonddrill			=3,
-		/obj/item/weapon/pickaxe/gold					=3,
-		/obj/item/weapon/pickaxe/plasmacutter			=2,
-		/obj/structure/closet/syndicate/resources		=2,
-		/obj/item/weapon/melee/energy/sword/pirate		=1,
-		/obj/mecha/working/ripley/mining				=1
-	)
-	complex_max_size=2
-
-	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
-
-/mining_surprise/alien_nest
-	name="Hidden Nest"
-	floortypes = list(
-		/turf/simulated/floor/plating/airless/asteroid=100
-	)
-
-	walltypes = list(
-		/turf/simulated/mineral/random/high_chance=1
-	)
-
-	spawntypes = list(
-		/obj/item/clothing/mask/facehugger				=4,
-		/obj/mecha/working/ripley/mining				=1
-	)
-	fluffitems = list(
-		/obj/effect/decal/remains/human                 = 5,
-		/obj/effect/decal/cleanable/xenoblood			= 5,
-		/obj/effect/decal/mecha_wreckage/ripley			= 1
-	)
-	complex_max_size=6
-	room_size_max=7
-
-	var/const/eggs_left=10 // Per complex
-	var/turf/weeds[0] // Turfs with weeds.
-	postProcessComplex()
-		..()
-		var/list/all_floors=list()
-		for(var/surprise_room/room in rooms)
-			var/list/w_cand=room.floors
-			var/egged=0
-			while(w_cand.len)
-				var/turf/weed_turf = pick(w_cand)
-				if(locate(/obj/effect/alien) in weed_turf)
-					continue
-				w_cand -= weed_turf
-				if(weed_turf && !egged)
-					new /obj/effect/alien/weeds/node(weed_turf)
-					weeds += weed_turf
-					egged=1
-				else
-					all_floors |= room.floors
-
-		for(var/e=0;e<eggs_left;e++)
-			var/turf/egg_turf = pick(all_floors)
-			if(egg_turf && !(locate(/obj/effect/alien) in egg_turf))
-				new /obj/effect/alien/egg(egg_turf)
-
-///////////////////
-// /tg/ Surprises
-/mining_surprise/organharvest
-	walltypes = list(
-		/turf/simulated/wall/r_wall=2,
-		/turf/simulated/wall=2,
-		/turf/simulated/mineral/random/high_chance=1
-	)
-	floortypes = list(
-		/turf/simulated/floor=1,
-		/turf/simulated/floor/engine=1
-	)
-	spawntypes = list(
-		/obj/item/device/mass_spectrometer/adv=1,
-		/obj/item/clothing/glasses/hud/health=1,
-		/obj/machinery/bot/medbot/mysterious=1
-	)
-	fluffitems = list(
-		/obj/effect/decal/cleanable/blood=5,
-		/obj/item/weapon/reagent_containers/food/snacks/appendix=2, // OM NOM
-		/obj/structure/closet/crate/freezer=2,
-		/obj/machinery/optable=1,
-		/obj/item/weapon/scalpel=1,
-		/obj/item/weapon/storage/firstaid/regular=3,
-		/obj/item/weapon/tank/anesthetic=1,
-		///obj/item/weapon/surgical_drapes=2
-	)
-
-	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
-
-	complex_max_size=3
-	room_size_max=7
-
-/mining_surprise/cult
-	name = "Hidden Temple"
-	walltypes = list(
-		/turf/simulated/wall/cult=3,
-		/turf/simulated/mineral/random/high_chance=1
-	)
-	floortypes = list(
-		/turf/simulated/floor/engine/cult=1
-	)
-	spawntypes = list(
-		/mob/living/simple_animal/hostile/creature=1,
-		// /obj/item/organ/heart=2,
-		/obj/item/device/soulstone=1
-	)
-	fluffitems = list(
-		/obj/effect/gateway=1,
-		/obj/effect/gibspawner=1,
-		/obj/structure/cult/talisman=1,
-		/obj/item/toy/crayon/red=2,
-		/obj/effect/decal/cleanable/blood=4,
-		/obj/structure/table/woodentable=2,
-		/obj/item/weapon/ectoplasm=3
-	)
-
-	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
-
-	complex_max_size=3
-	room_size_max=5
-
-/mining_surprise/wizden
-	name = "Hidden Den"
-	walltypes = list(
-		/turf/simulated/wall/mineral/plasma=3,
-		/turf/simulated/mineral/random/high_chance=1
-	)
-	floortypes = list(
-		/turf/simulated/floor/wood=1
-	)
-	spawntypes = list(
-		// /vg/: Let's not. /obj/item/weapon/veilrender/vealrender=1,
-		// /vg/: /obj/item/key=1
-		/obj/item/clothing/glasses/monocle=5,
-		// /vg/:
-		// /obj/structure/stool/bed/chair/vehicle/wizmobile=1
-	)
-	fluffitems = list(
-		/obj/structure/safe/floor=1,
-		// /obj/structure/wardrobe=1,
-		/obj/item/weapon/storage/belt/soulstone=1,
-		/obj/item/trash/candle=3,
-		/obj/item/weapon/dice=3,
-		/obj/item/weapon/staff=2,
-		/obj/effect/decal/cleanable/dirt=3,
-		/obj/item/weapon/coin/mythril=3
-	)
-
-	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
-
-	complex_max_size=1
-	room_size_max=7
-
-/mining_surprise/cavein
-	name="Cave-In"
-
-	walltypes = list(
-		/turf/simulated/mineral/random/high_chance=1
-	)
-	floortypes = list(
-		/turf/simulated/floor/plating/airless/asteroid=1
-	)
-	spawntypes = list(
-		/obj/mecha/working/ripley/mining=1,
-		/obj/item/weapon/pickaxe/jackhammer=2,
-		/obj/item/weapon/pickaxe/diamonddrill=2
-	)
-	fluffitems = list(
-		/obj/effect/decal/cleanable/blood=3,
-		/obj/effect/decal/remains/human=1,
-		/obj/item/clothing/under/overalls=1,
-		/obj/item/weapon/reagent_containers/food/snacks/grown/chili=1,
-		/obj/item/weapon/tank/oxygen/red=2
-	)
-
-	complex_max_size=3
-	room_size_max=7
-
-/mining_surprise/human/hitech
-	complex_max_size=3
-	room_size_max=7
-
-	walltypes = list(
-		/turf/simulated/wall/r_wall=1
-	)
-	floortypes = list(
-		/turf/simulated/floor/greengrid=1,
-		/turf/simulated/floor/bluegrid=1
-	)
-	spawntypes = list(
-		/obj/item/weapon/pickaxe/plasmacutter=1,
-		/obj/machinery/shieldgen=1,
-		/obj/item/weapon/cell/hyper=1
-	)
-	fluffitems = list(
-		/obj/structure/table/reinforced=2,
-		/obj/item/weapon/stock_parts/scanning_module/phasic=3,
-		/obj/item/weapon/stock_parts/matter_bin/super=3,
-		/obj/item/weapon/stock_parts/manipulator/pico=3,
-		/obj/item/weapon/stock_parts/capacitor/super=3,
-		/obj/item/device/pda/clear=1
-	)
-
-/mining_surprise/human/speakeasy
-	complex_max_size=3
-	room_size_max=7
-
-	floortypes = list(
-		/turf/simulated/floor,
-		/turf/simulated/floor/wood)
-	spawntypes = list(
-		/obj/item/weapon/melee/energy/sword/pirate=1,
-		/obj/structure/closet/syndicate/resources=2
-	)
-	fluffitems = list(
-		/obj/structure/table/woodentable=2,
-		/obj/structure/reagent_dispensers/beerkeg=1,
-		/obj/item/weapon/spacecash/c500=4,
-		/obj/item/weapon/reagent_containers/food/drinks/shaker=1,
-		/obj/item/weapon/reagent_containers/food/drinks/bottle/wine=3,
-		/obj/item/weapon/reagent_containers/food/drinks/bottle/whiskey=3,
-		/obj/item/clothing/shoes/laceup=2
-	)
-
-/mining_surprise/human/plantlab
-	complex_max_size=2
-	room_size_max=7
-
-	spawntypes = list(
-		/obj/item/weapon/gun/energy/floragun=1,
-		/obj/item/seeds/novaflowerseed=2,
-		/obj/item/seeds/bluespacetomatoseed=2
-	)
-	fluffitems = list(
-		// /obj/structure/flora/kirbyplants=1,
-		/obj/structure/table/reinforced=2,
-		/obj/machinery/hydroponics=1,
-		/obj/effect/glowshroom/single=2,
-		/obj/item/weapon/reagent_containers/syringe/antitoxin=2,
-		/obj/item/weapon/reagent_containers/glass/bottle/diethylamine=3,
-		/obj/item/weapon/reagent_containers/glass/bottle/ammonia=3
-	)
-
-		/*if("poly")
-			theme = "poly"
-			x_size = 5
-			y_size = 5
-			walltypes = list(/turf/simulated/wall/mineral/clown)
-			floortypes= list(/turf/simulated/floor/engine)
-			treasureitems = list(/obj/item/weapon/spellbook=1,/obj/mecha/combat/marauder=1,/obj/machinery/wish_granter=1)
-			fluffitems = list(/obj/item/weapon/melee/energy/axe)*/
\ No newline at end of file
diff --git a/code/modules/mining/surprise.dm b/code/modules/mining/surprise.dm
new file mode 100644
index 00000000000..d72e0dbe242
--- /dev/null
+++ b/code/modules/mining/surprise.dm
@@ -0,0 +1,342 @@
+#define CONTIGUOUS_WALLS  1
+#define CONTIGUOUS_FLOORS 2
+
+#define TURF_FLOOR 0
+#define TURF_WALL 1
+var/global/list/mining_surprises = typesof(/mining_surprise)-/mining_surprise
+
+/surprise_turf_info
+	var/list/types[0]
+	var/list/adjacents
+	var/turf_type=TURF_FLOOR
+
+	New()
+		adjacents=list(
+			"[NORTH]"=list(),
+			"[SOUTH]"=list(),
+			"[EAST]"=list(),
+			"[WEST]"=list()
+		)
+
+	proc/GetAdjacentTypes(var/dir)
+		return adjacents["[dir]"]
+
+/surprise_room
+	var/list/turfs[0]
+
+	// Used for layout system.
+	var/list/turf_info[0]
+
+	var/size_x=0
+	var/size_y=0
+
+	proc/UpdateTurfs()
+		for(var/turf/T in turfs)
+			UpdateTurf(T)
+
+	proc/GetTurfs(var/ttype)
+		var/list/selected[0]
+		for(var/turf/T in turfs)
+			var/surprise_turf_info/Ti = GetTurfInfo(T)
+			if(Ti.turf_type==ttype)
+				selected |= T
+		return selected
+
+	proc/GetTurfInfo(var/turf/T)
+		var/surprise_turf_info/sti
+		if(!(T in turf_info))
+			sti = new
+			turf_info[T]=sti
+		else
+			sti = turf_info[T]
+		return sti
+
+	proc/UpdateTurf(var/turf/T, var/no_adjacent=0)
+		// List types in this turf.
+		var/surprise_turf_info/sti = GetTurfInfo(T)
+
+		sti.types=0
+		for(var/atom/A in T.contents)
+			sti.types |= A.type
+
+		if(no_adjacent) return
+		UpdateAdjacentsOfTurf(T)
+
+	proc/AddTypeToTurf(var/turf/T, var/newtype)
+		var/surprise_turf_info/sti = GetTurfInfo(T)
+		sti.types |= newtype
+
+		//UpdateAdjacentsOfTurf(T)
+
+	proc/UpdateAdjacentsOfTurf(var/turf/T)
+		var/surprise_turf_info/Ti = turf_info[T]
+		for(var/dir in cardinal)
+			var/turf/AT = get_step(T,dir)
+			if(!(AT in turfs))
+				return
+			if(!(AT in turf_info))
+				UpdateTurf(AT, no_adjacent=1)
+			var/surprise_turf_info/ATi = turf_info[AT]
+			// By-Ref so shit gets updated.
+			ATi.adjacents["[reverse_direction(dir)]"]=Ti.types
+
+
+// For room layouts.
+/layout_rule
+	var/mining_surprise/root
+	var/surprise_room/room
+
+	// What to place if true
+	var/placetype=null
+
+	var/min_to_place=0 // Force placement at ALL candidates.
+	var/max_to_place=0 // 0 = max amount of ALL candidates.
+
+	var/placed_times=0
+
+	var/list/decorations=list() // types, empty for no decorations
+
+	var/flags = 0
+
+	New(var/mining_surprise/_root,var/surprise_room/_room)
+		root=_root
+		room=_room
+
+	// Called in Evaluate
+	proc/Plop(var/turf/T)
+		new placetype(T)
+		placed_times++
+		room.AddTypeToTurf(T,placetype)
+		if(decorations.len)
+			var/decoration = pickweight(decorations)
+			new decoration(T)
+			room.AddTypeToTurf(T,decoration)
+
+	// Return 1 if we Plop()'d something.
+	// Return 0 if we didn't or something went wrong.
+	proc/Evaluate()
+		var/list/candidates=GetCandidates()
+		if(candidates.len==0)
+			return 0
+		if(max_to_place<=0)
+			max_to_place=candidates.len
+		var/n=candidates.len
+		if(min_to_place>0)
+			n = min(candidates.len,rand(min_to_place,max_to_place))
+		if(n==0)
+			return 0
+		for(var/i=0;i<n;i++)
+			var/turf/T = candidates[1]
+			candidates-=T
+			Plop(T)
+
+	// Return list of turfs.
+	proc/GetCandidates()
+		return list()
+
+/layout_rule/place_adjacent
+	// MUST be next to any of these.  Anywhere if not set.
+	var/list/next_to=list(
+		// type = list(NORTH,SOUTH,etc)
+	)
+	// MUST NOT be next to these.
+	var/list/not_next_to=list(
+		// type = list(NORTH,SOUTH,etc)
+	)
+	GetCandidates()
+		// Organize next_to/not_next_to so it's easier to use.
+		var/list/opt_nt[0]
+		var/list/opt_nnt[0]
+		var/list/candidates[0]
+		for(var/dir in cardinal)
+			var/di = "[dir]"
+			if(!di in opt_nt)
+				opt_nt[di]=list()
+				opt_nnt[di]=list()
+			for(var/t in next_to)
+				if(dir in next_to[t])
+					var/list/tl = opt_nt[di]
+					tl |= t
+			for(var/t in not_next_to)
+				if(dir in not_next_to[t])
+					var/list/tl = opt_nnt[di]
+					tl |= t
+		// Check each turf.
+		for(var/turf/T in room.turfs)
+			if(IsTurfCandidate(T,opt_nt,opt_nnt))
+				candidates += T
+		return candidates
+
+	proc/IsTurfCandidate(var/turf/T,var/list/opt_nt,var/list/opt_nnt)
+		var/surprise_turf_info/sti = room.GetTurfInfo(T)
+		for(var/dir in cardinal)
+			var/di = "[dir]"
+			for(var/_type in sti.adjacents[di])
+				if(_type in opt_nnt[di])
+					return 0
+				if(_type in opt_nt[di])
+					return 1
+		return 1
+
+/mining_surprise
+	var/name = "Hidden Complex"
+
+	//: Types of floor to use
+	var/list/floortypes[0]
+	var/list/walltypes[0]
+	var/list/spawntypes[0]
+	var/list/fluffitems[0]
+
+	var/max_richness=2
+
+	//: How many rooms?
+	var/complex_max_size=1
+
+	var/room_size_max=5
+
+	var/flags=0
+
+	var/list/rooms=list()
+	var/list/goodies=list()
+	var/list/candidates=list()
+
+	var/area/asteroid/artifactroom/complex_area
+
+	proc/spawn_complex(var/atom/start_loc)
+		name = "[initial(name)] #[rand(100,999)]"
+		complex_area = new
+		complex_area.name = name
+		var/atom/pos=start_loc
+		var/nrooms=complex_max_size
+		var/maxtries=50
+		var/l_size_x=0
+		var/l_size_y=0
+		while(nrooms && maxtries)
+			var/sx=rand(3,room_size_max)
+			var/sy=rand(3,room_size_max)
+			var/o_x=l_size_x?rand(0,l_size_x):0
+			var/o_y=l_size_y?rand(0,l_size_y):0
+			var/atom/npos
+			switch(pick(cardinal))
+				if(NORTH)
+					npos=locate(pos.x+o_x,  pos.y+sy-1, pos.z)
+				if(SOUTH)
+					npos=locate(pos.x+o_x,  pos.y-sy+1, pos.z)
+				if(WEST)
+					npos=locate(pos.x-sx-1, pos.y+o_y,  pos.z)
+				if(EAST)
+					npos=locate(pos.x+sx+1, pos.y+o_y,  pos.z)
+			if(spawn_room(npos,sx,sy,1))
+				pos=npos
+				l_size_x=sx
+				l_size_y=sy
+			else if(complex_max_size==nrooms)
+				// Failed to make first room, abort.
+				del(complex_area)
+				return 0
+			else
+				maxtries--
+				continue
+			nrooms--
+		postProcessComplex()
+		message_admins("Complex spawned at [formatJumpTo(start_loc)]")
+		return 1
+
+	proc/postProcessRoom(var/surprise_room/room)
+		for(var/turf/floor in room.turfs)
+			if(floor.density) continue
+			for(var/turf/T in floor.AdjacentTurfs())
+				if(T in room.turfs)
+					if(T.density) continue
+					candidates|=T
+					break
+
+	proc/postProcessComplex()
+		for(var/i=0;i<=rand(1,max_richness);i++)
+			if(!candidates.len)
+				return
+			var/turf/T = pick(candidates)
+			var/thing = pickweight(spawntypes)
+			if(thing==null)
+				continue
+			new thing(T)
+			candidates -= T
+			message_admins("Goodie [thing] spawned at [formatJumpTo(T)]")
+
+		for(var/i=0;i<=rand(5,10);i++)
+			if(!candidates.len)
+				return
+			var/turf/T = pick(candidates)
+			var/thing = pickweight(fluffitems)
+			if(thing==null)
+				continue
+			new thing(T)
+
+	proc/spawn_room(var/atom/start_loc, var/x_size, var/y_size, var/clean=0)
+		if(!check_complex_placement(start_loc,x_size,y_size))
+			return 0
+
+		// If walls/floors are contiguous, pick them out.
+		var/wall_type
+		if(flags & CONTIGUOUS_WALLS)
+			wall_type = pickweight(walltypes)
+
+		var/floor_type
+		if(flags & CONTIGUOUS_FLOORS)
+			floor_type = pickweight(floortypes)
+
+
+		var/list/walls[0]
+		var/list/floors[0]
+		for(var/x = 0,x<x_size,x++)
+			for(var/y = 0,y<y_size,y++)
+				var/turf/cur_loc = locate(start_loc.x+x,start_loc.y+y,start_loc.z)
+
+				if(clean)
+					for(var/O in cur_loc)
+						qdel(O)
+
+				if(x == 0 || x==x_size-1 || y==0 || y==y_size-1)
+					walls |= cur_loc
+				else
+					floors |= cur_loc
+
+		var/surprise_room/room = new
+		for(var/turf/turf in walls)
+
+			if(!(flags & CONTIGUOUS_WALLS))
+				wall_type=pickweight(walltypes)
+
+			var/turf/T
+			if(dd_hasprefix("[wall_type]","/obj"))
+				if(!(flags & CONTIGUOUS_FLOORS))
+					floor_type=pickweight(floortypes)
+				T=new floor_type(turf)
+				new wall_type(T)
+			else
+				//testing("Creating wall of type [wall_type].")
+				T=new wall_type(turf)
+			room.turfs += T
+			complex_area.contents += T
+			var/surprise_turf_info/Ti = room.GetTurfInfo(T)
+			Ti.turf_type=TURF_WALL
+
+		for(var/turf/turf in floors)
+			if(!(flags & CONTIGUOUS_FLOORS))
+				floor_type=pickweight(floortypes)
+
+			var/turf/T = new floor_type(turf)
+			room.turfs += T
+			complex_area.contents += T
+			var/surprise_turf_info/Ti = room.GetTurfInfo(T)
+			Ti.turf_type=TURF_FLOOR
+
+		room.UpdateTurfs()
+
+		postProcessRoom(room)
+
+		rooms += room
+
+		message_admins("Room spawned at [formatJumpTo(start_loc)]")
+
+		return 1
\ No newline at end of file
diff --git a/code/modules/mining/surprises/tg.dm b/code/modules/mining/surprises/tg.dm
new file mode 100644
index 00000000000..8e413da0a53
--- /dev/null
+++ b/code/modules/mining/surprises/tg.dm
@@ -0,0 +1,183 @@
+///////////////////
+// /tg/ Surprises
+///////////////////
+
+/mining_surprise/organharvest
+	walltypes = list(
+		/turf/simulated/wall/r_wall=2,
+		/turf/simulated/wall=2,
+		/turf/simulated/mineral/random/high_chance=1
+	)
+	floortypes = list(
+		/turf/simulated/floor=1,
+		/turf/simulated/floor/engine=1
+	)
+	spawntypes = list(
+		/obj/item/device/mass_spectrometer/adv=1,
+		/obj/item/clothing/glasses/hud/health=1,
+		/obj/machinery/bot/medbot/mysterious=1
+	)
+	fluffitems = list(
+		/obj/effect/decal/cleanable/blood=5,
+		/obj/item/weapon/reagent_containers/food/snacks/appendix=2, // OM NOM
+		/obj/structure/closet/crate/freezer=2,
+		/obj/machinery/optable=1,
+		/obj/item/weapon/scalpel=1,
+		/obj/item/weapon/storage/firstaid/regular=3,
+		/obj/item/weapon/tank/anesthetic=1,
+		///obj/item/weapon/surgical_drapes=2
+	)
+
+	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
+
+	complex_max_size=3
+	room_size_max=7
+
+/mining_surprise/cult
+	name = "Hidden Temple"
+	walltypes = list(
+		/turf/simulated/wall/cult=3,
+		/turf/simulated/mineral/random/high_chance=1
+	)
+	floortypes = list(
+		/turf/simulated/floor/engine/cult=1
+	)
+	spawntypes = list(
+		/mob/living/simple_animal/hostile/creature=1,
+		// /obj/item/organ/heart=2,
+		/obj/item/device/soulstone=1
+	)
+	fluffitems = list(
+		/obj/effect/gateway=1,
+		/obj/effect/gibspawner=1,
+		/obj/structure/cult/talisman=1,
+		/obj/item/toy/crayon/red=2,
+		/obj/effect/decal/cleanable/blood=4,
+		/obj/structure/table/woodentable=2,
+		/obj/item/weapon/ectoplasm=3
+	)
+
+	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
+
+	complex_max_size=3
+	room_size_max=5
+
+/mining_surprise/wizden
+	name = "Hidden Den"
+	walltypes = list(
+		/turf/simulated/wall/mineral/plasma=3,
+		/turf/simulated/mineral/random/high_chance=1
+	)
+	floortypes = list(
+		/turf/simulated/floor/wood=1
+	)
+	spawntypes = list(
+		// /vg/: Let's not. /obj/item/weapon/veilrender/vealrender=1,
+		// /vg/: /obj/item/key=1
+		/obj/item/clothing/glasses/monocle=5,
+	)
+	fluffitems = list(
+		/obj/structure/safe/floor=1,
+		// /obj/structure/wardrobe=1,
+		/obj/item/weapon/storage/belt/soulstone=1,
+		/obj/item/trash/candle=3,
+		/obj/item/weapon/dice=3,
+		/obj/item/weapon/staff=2,
+		/obj/effect/decal/cleanable/dirt=3,
+		/obj/item/weapon/coin/mythril=3
+	)
+
+	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
+
+	complex_max_size=1
+	room_size_max=7
+
+/mining_surprise/cavein
+	name="Cave-In"
+
+	walltypes = list(
+		/turf/simulated/mineral/random/high_chance=1
+	)
+	floortypes = list(
+		/turf/simulated/floor/plating/airless/asteroid=1
+	)
+	spawntypes = list(
+		/obj/mecha/working/ripley/mining=1,
+		/obj/item/weapon/pickaxe/jackhammer=2,
+		/obj/item/weapon/pickaxe/diamonddrill=2
+	)
+	fluffitems = list(
+		/obj/effect/decal/cleanable/blood=3,
+		/obj/effect/decal/remains/human=1,
+		/obj/item/clothing/under/overalls=1,
+		/obj/item/weapon/reagent_containers/food/snacks/grown/chili=1,
+		/obj/item/weapon/tank/oxygen/red=2
+	)
+
+	complex_max_size=3
+	room_size_max=7
+
+/mining_surprise/human/hitech
+	complex_max_size=3
+	room_size_max=7
+
+	walltypes = list(
+		/turf/simulated/wall/r_wall=1
+	)
+	floortypes = list(
+		/turf/simulated/floor/greengrid=1,
+		/turf/simulated/floor/bluegrid=1
+	)
+	spawntypes = list(
+		/obj/item/weapon/pickaxe/plasmacutter=1,
+		/obj/machinery/shieldgen=1,
+		/obj/item/weapon/cell/hyper=1
+	)
+	fluffitems = list(
+		/obj/structure/table/reinforced=2,
+		/obj/item/weapon/stock_parts/scanning_module/phasic=3,
+		/obj/item/weapon/stock_parts/matter_bin/super=3,
+		/obj/item/weapon/stock_parts/manipulator/pico=3,
+		/obj/item/weapon/stock_parts/capacitor/super=3,
+		/obj/item/device/pda/clear=1
+	)
+
+/mining_surprise/human/speakeasy
+	complex_max_size=3
+	room_size_max=7
+
+	floortypes = list(
+		/turf/simulated/floor,
+		/turf/simulated/floor/wood)
+	spawntypes = list(
+		/obj/item/weapon/melee/energy/sword/pirate=1,
+		/obj/structure/closet/syndicate/resources=2
+	)
+	fluffitems = list(
+		/obj/structure/table/woodentable=2,
+		/obj/structure/reagent_dispensers/beerkeg=1,
+		/obj/item/weapon/spacecash/c500=4,
+		/obj/item/weapon/reagent_containers/food/drinks/shaker=1,
+		/obj/item/weapon/reagent_containers/food/drinks/bottle/wine=3,
+		/obj/item/weapon/reagent_containers/food/drinks/bottle/whiskey=3,
+		/obj/item/clothing/shoes/laceup=2
+	)
+
+/mining_surprise/human/plantlab
+	complex_max_size=2
+	room_size_max=7
+
+	spawntypes = list(
+		/obj/item/weapon/gun/energy/floragun=1,
+		/obj/item/seeds/novaflowerseed=2,
+		/obj/item/seeds/bluespacetomatoseed=2
+	)
+	fluffitems = list(
+		// /obj/structure/flora/kirbyplants=1,
+		/obj/structure/table/reinforced=2,
+		/obj/machinery/hydroponics=1,
+		/obj/effect/glowshroom/single=2,
+		/obj/item/weapon/reagent_containers/syringe/antitoxin=2,
+		/obj/item/weapon/reagent_containers/glass/bottle/diethylamine=3,
+		/obj/item/weapon/reagent_containers/glass/bottle/ammonia=3
+	)
\ No newline at end of file
diff --git a/code/modules/mining/surprises/vg.dm b/code/modules/mining/surprises/vg.dm
new file mode 100644
index 00000000000..120df968390
--- /dev/null
+++ b/code/modules/mining/surprises/vg.dm
@@ -0,0 +1,133 @@
+/* Not quite there yet
+#define ANY_SIDE list(NORTH,SOUTH,EAST,WEST)
+
+/layout_rule/place_adjacent/workbench
+	placetype=/obj/structure/table
+
+	min_to_place=3
+	min_to_place=7
+
+	next_to=list(
+		/turf/simulated/wall = ANY_SIDE,
+		/turf/simulated/wall/r_wall = ANY_SIDE,
+	)
+	// MUST NOT be next to these.
+	not_next_to=list()
+
+	decorations=list(
+		/obj/item/weapon/screwdriver=2,
+		/obj/item/weapon/crowbar=2,
+		/obj/item/stack/metal=1,
+		/obj/item/weapon/wrench=2
+	)
+
+/layout_rule/place_adjacent/workbench/wooden
+	placetype=/obj/structure/table/woodentable
+
+/layout_rule/place_adjacent/workbench/reinforced
+	placetype=/obj/structure/table/reinforced
+
+/layout_rule/place_adjacent/chair
+	placetype=/obj/structure/stool/bed/chair
+
+	min_to_place=1
+	min_to_place=2
+
+	next_to=list(
+		/obj/structure/table = ANY_SIDE,
+	)
+	// MUST NOT be next to these.
+	not_next_to=list(
+		/obj/structure/stool/bed/chair = ANY_SIDE
+	)
+
+	//flags = FACE_MATCH
+
+/layout_rule/place_adjacent/chair/wooden
+	placetype=/obj/structure/stool/bed/chair/wooden
+
+	min_to_place=1
+	min_to_place=2
+
+	next_to=list(
+		/obj/structure/table/wooden = ANY_SIDE,
+	)
+	// MUST NOT be next to these.
+	not_next_to=list(
+		/obj/structure/stool/bed/chair = ANY_SIDE
+	)
+
+	//flags = FACE_MATCH
+*/
+/mining_surprise/human
+	name="Hidden Complex"
+	floortypes = list(
+		/turf/simulated/floor/airless=95,
+		/turf/simulated/floor/plating/airless=5
+	)
+	walltypes = list(
+		/turf/simulated/wall=100
+	)
+	spawntypes = list(
+		/obj/item/weapon/pickaxe/silver					=4,
+		/obj/item/weapon/pickaxe/drill					=4,
+		/obj/item/weapon/pickaxe/jackhammer				=4,
+		/obj/item/weapon/pickaxe/diamond				=3,
+		/obj/item/weapon/pickaxe/diamonddrill			=3,
+		/obj/item/weapon/pickaxe/gold					=3,
+		/obj/item/weapon/pickaxe/plasmacutter			=2,
+		/obj/structure/closet/syndicate/resources		=2,
+		/obj/item/weapon/melee/energy/sword/pirate		=1,
+		/obj/mecha/working/ripley/mining				=1
+	)
+	complex_max_size=2
+
+	flags = CONTIGUOUS_WALLS | CONTIGUOUS_FLOORS
+
+/mining_surprise/alien_nest
+	name="Hidden Nest"
+	floortypes = list(
+		/turf/simulated/floor/plating/airless/asteroid=100
+	)
+
+	walltypes = list(
+		/turf/simulated/mineral/random/high_chance=1
+	)
+
+	spawntypes = list(
+		/obj/item/clothing/mask/facehugger				=4,
+		/obj/mecha/working/ripley/mining				=1
+	)
+	fluffitems = list(
+		/obj/effect/decal/remains/human                 = 5,
+		/obj/effect/decal/cleanable/xenoblood          = 5,
+		/obj/effect/decal/mecha_wreckage/ripley			= 1
+	)
+	complex_max_size=6
+	room_size_max=7
+
+	var/const/eggs_left=10 // Per complex
+	var/turf/weeds[0] // Turfs with weeds.
+	postProcessComplex()
+		..()
+		var/list/all_floors=list()
+		for(var/surprise_room/room in rooms)
+			var/list/w_cand=room.GetTurfs(TURF_FLOOR)
+			all_floors |= w_cand
+			var/egged=0
+			while(w_cand.len>0)
+				var/turf/weed_turf = pick(w_cand)
+				w_cand -= weed_turf
+				if(weed_turf.density)
+					continue
+				if(locate(/obj/effect/alien) in weed_turf)
+					continue
+				if(weed_turf && !egged)
+					new /obj/effect/alien/weeds/node(weed_turf)
+					weeds += weed_turf
+					break
+
+		for(var/e=0;e<eggs_left;e++)
+			var/turf/egg_turf = pick(all_floors)
+			if(egg_turf && !(locate(/obj/effect/alien) in egg_turf))
+				new /obj/effect/alien/egg(egg_turf)