diff --git a/code/__HELPERS/roundend.dm b/code/__HELPERS/roundend.dm
index e4a2e6521a..a860a8cd3f 100644
--- a/code/__HELPERS/roundend.dm
+++ b/code/__HELPERS/roundend.dm
@@ -238,8 +238,11 @@
 	CHECK_TICK
 	SSdbcore.SetRoundEnd()
 	//Collects persistence features
-	if(mode.allow_persistence_save)
-		SSpersistence.CollectData()
+	if(mode.station_was_nuked)
+		SSpersistence.station_was_destroyed = TRUE
+	if(!mode.allow_persistence_save)
+		SSpersistence.station_persistence_save_disabled = TRUE
+	SSpersistence.CollectData()
 
 	//stop collecting feedback during grifftime
 	SSblackbox.Seal()
diff --git a/code/controllers/configuration/entries/game_options.dm b/code/controllers/configuration/entries/game_options.dm
index 67e4a97894..dc8e9e1859 100644
--- a/code/controllers/configuration/entries/game_options.dm
+++ b/code/controllers/configuration/entries/game_options.dm
@@ -566,3 +566,20 @@
 	config_entry_value = 0.333
 	min_val = 0
 	integer = FALSE
+
+/// Amount of dirtyness tiles need to spawn dirt.
+/datum/config_entry/number/turf_dirt_threshold
+	config_entry_value = 100
+	min_val = 1
+	integer = TRUE
+
+/// Alpha dirt starts at
+/datum/config_entry/number/dirt_alpha_starting
+	config_entry_value = 127
+	max_val = 255
+	min_val = 0
+	integer = TRUE
+
+/// Dirtyness multiplier for making turfs dirty
+/datum/config_entry/number/turf_dirty_multiplier
+	config_entry_value = 1
diff --git a/code/controllers/configuration/entries/persistence.dm b/code/controllers/configuration/entries/persistence.dm
new file mode 100644
index 0000000000..2444034b86
--- /dev/null
+++ b/code/controllers/configuration/entries/persistence.dm
@@ -0,0 +1,20 @@
+/// Whether or not to use the persistence system for cleanable objects
+/datum/config_entry/flag/persistent_debris
+	config_entry_value = FALSE
+
+/// Whether or not to nuke all roundstart debris that isn't due to persistence if the above is true
+/datum/config_entry/flag/persistent_debris_only
+	config_entry_value = TRUE
+
+/// Max amount of objects to store, total
+/datum/config_entry/number/persistent_debris_global_max
+	config_entry_value = 10000
+	integer = TRUE
+
+/// Max amount of objects to store per type
+/datum/config_entry/number/persistent_debris_type_max
+	config_entry_value = 2000
+	integer = TRUE
+
+/// Wipe dirty stuff on nuke
+/datum/config_entry/flag/persistent_debris_wipe_on_nuke
diff --git a/code/controllers/subsystem/mapping.dm b/code/controllers/subsystem/mapping.dm
index 2ea3b29c91..90908bbde0 100644
--- a/code/controllers/subsystem/mapping.dm
+++ b/code/controllers/subsystem/mapping.dm
@@ -41,6 +41,8 @@ SUBSYSTEM_DEF(mapping)
 	var/datum/space_level/transit
 	var/datum/space_level/empty_space
 	var/num_of_res_levels = 1
+	/// Lookup for zlevel to station z. text = num.
+	var/list/z_to_station_z_index
 
 	var/stat_map_name = "Loading..."
 
@@ -259,6 +261,16 @@ SUBSYSTEM_DEF(mapping)
 		INIT_ANNOUNCE("Loaded [name] in [(REALTIMEOFDAY - start_time)/10]s!")
 	return parsed_maps
 
+/datum/controller/subsystem/mapping/proc/setup_station_z_index()
+	z_to_station_z_index = list()
+	var/sz = 1
+	var/cz = station_start
+	if(islist(config.map_file))
+		for(var/map in config.map_file)
+			z_to_station_z_index["[cz++]"] = sz++
+	else
+		z_to_station_z_index["[station_start]"] = 1
+
 /datum/controller/subsystem/mapping/proc/loadWorld()
 	//if any of these fail, something has gone horribly, HORRIBLY, wrong
 	var/list/FailedZs = list()
@@ -271,6 +283,8 @@ SUBSYSTEM_DEF(mapping)
 	INIT_ANNOUNCE("Loading [config.map_name]...")
 	LoadGroup(FailedZs, "Station", config.map_path, config.map_file, config.traits, ZTRAITS_STATION, FALSE, config.orientation)
 
+	setup_station_z_index()
+
 	if(SSdbcore.Connect())
 		var/datum/DBQuery/query_round_map_name = SSdbcore.NewQuery("UPDATE [format_table_name("round")] SET map_name = '[config.map_name]' WHERE id = [GLOB.round_id]")
 		query_round_map_name.Execute()
diff --git a/code/controllers/subsystem/persistence.dm b/code/controllers/subsystem/persistence/_persistence.dm
similarity index 51%
rename from code/controllers/subsystem/persistence.dm
rename to code/controllers/subsystem/persistence/_persistence.dm
index e39242aac3..741d1dd72a 100644
--- a/code/controllers/subsystem/persistence.dm
+++ b/code/controllers/subsystem/persistence/_persistence.dm
@@ -5,18 +5,14 @@ SUBSYSTEM_DEF(persistence)
 	name = "Persistence"
 	init_order = INIT_ORDER_PERSISTENCE
 	flags = SS_NO_FIRE
-	var/list/satchel_blacklist 		= list() //this is a typecache
-	var/list/new_secret_satchels 	= list() //these are objects
-	var/list/old_secret_satchels 	= list()
+
+	/// Marks if the station got horribly destroyed
+	var/station_was_destroyed = FALSE
+	/// Marks if persistence save should be disabled
+	var/station_persistence_save_disabled = FALSE
 
 	var/list/obj/structure/chisel_message/chisel_messages = list()
 	var/list/saved_messages = list()
-	var/list/saved_modes = list(1,2,3)
-	var/list/saved_dynamic_rules = list(list(),list(),list())
-	var/list/saved_storytellers = list("foo","bar","baz")
-	var/list/average_dynamic_threat = 50
-	var/list/saved_maps
-	var/list/saved_trophies = list()
 	var/list/spawned_objects = list()
 	var/list/antag_rep = list()
 	var/list/antag_rep_change = list()
@@ -28,62 +24,81 @@ SUBSYSTEM_DEF(persistence)
 	var/list/paintings = list()
 
 /datum/controller/subsystem/persistence/Initialize()
-	LoadSatchels()
-	LoadPoly()
-	LoadChiselMessages()
-	LoadTrophies()
-	LoadRecentModes()
-	LoadRecentStorytellers()
-	LoadRecentRulesets()
-	LoadRecentMaps()
-	LoadPhotoPersistence()
+	LoadServerPersistence()
+	LoadGamePersistence()
+	var/map_persistence_path = get_map_persistence_path()
+	if(map_persistence_path)
+		LoadMapPersistence()
+	return ..()
+
+/**
+ * Gets the persistence path of the current map.
+ */
+/datum/controller/subsystem/persistence/proc/get_map_persistence_path()
+	ASSERT(SSmapping.config)
+	if(!SSmapping.config.persistence_key || (SSmapping.config.persistence_key == "NO_PERSIST"))
+		return null
+	return "data/persistence/[ckey(SSmapping.config.persistence_key)]"
+
+/datum/controller/subsystem/persistence/proc/CollectData()
+	SaveServerPersistence()
+	if(station_persistence_save_disabled)
+		return
+	SaveGamePersistence()
+	var/map_persistence_path = get_map_persistence_path()
+	if(map_persistence_path)
+		SaveMapPersistence()
+
+/**
+ * Loads persistent data relevant to the server: Configurations, past gamemodes, votes, antag rep, etc
+ */
+/datum/controller/subsystem/persistence/proc/LoadServerPersistence()
 	for(var/client/C in GLOB.clients)
 		LoadSavedVote(C.ckey)
 	if(CONFIG_GET(flag/use_antag_rep))
 		LoadAntagReputation()
 	LoadRandomizedRecipes()
-	LoadPanicBunker()
-	return ..()
 
-/datum/controller/subsystem/persistence/proc/LoadSatchels()
-	var/placed_satchel = 0
-	var/path
+/**
+ * Saves persistent data relevant to the server: Configurations, past gamemodes, votes, antag rep, etc
+ */
+/datum/controller/subsystem/persistence/proc/SaveServerPersistence()
+	if(CONFIG_GET(flag/use_antag_rep))
+		CollectAntagReputation()
+	SaveRandomizedRecipes()
 
-	var/json_file = file("data/npc_saves/SecretSatchels[SSmapping.config.map_name].json")
-	var/list/json = list()
-	if(fexists(json_file))
-		json = json_decode(file2text(json_file))
+/**
+ * Loads persistent data relevant to the game in general: Photos, etc
+ *
+ * Legacy map persistence systems also use this.
+ */
+/datum/controller/subsystem/persistence/proc/LoadGamePersistence()
+	LoadChiselMessages()
+	LoadPhotoPersistence()
+	LoadPaintings()
 
-	old_secret_satchels = json["data"]
-	var/obj/item/storage/backpack/satchel/flat/F
-	if(old_secret_satchels && old_secret_satchels.len >= 10) //guards against low drop pools assuring that one player cannot reliably find his own gear.
-		var/pos = rand(1, old_secret_satchels.len)
-		F = new()
-		old_secret_satchels.Cut(pos, pos+1 % old_secret_satchels.len)
-		F.x = old_secret_satchels[pos]["x"]
-		F.y = old_secret_satchels[pos]["y"]
-		F.z = SSmapping.station_start
-		path = text2path(old_secret_satchels[pos]["saved_obj"])
+/**
+ * Saves persistent data relevant to the game in general: Photos, etc
+ *
+ * Legacy map persistence systems also use this.
+ */
+/datum/controller/subsystem/persistence/proc/SaveGamePersistence()
+	CollectChiselMessages()
+	SavePhotoPersistence()						//THIS IS PERSISTENCE, NOT THE LOGGING PORTION.
+	SavePaintings()
+	SaveScars()
 
-	if(F)
-		if(isfloorturf(F.loc) && !isplatingturf(F.loc))
-			F.hide(1)
-		if(ispath(path))
-			var/spawned_item = new path(F)
-			spawned_objects[spawned_item] = TRUE
-		placed_satchel++
-	var/free_satchels = 0
-	for(var/turf/T in shuffle(block(locate(TRANSITIONEDGE,TRANSITIONEDGE,SSmapping.station_start), locate(world.maxx-TRANSITIONEDGE,world.maxy-TRANSITIONEDGE,SSmapping.station_start)))) //Nontrivially expensive but it's roundstart only
-		if(isfloorturf(T) && !isplatingturf(T))
-			new /obj/item/storage/backpack/satchel/flat/secret(T)
-			free_satchels++
-			if((free_satchels + placed_satchel) == 10) //ten tiles, more than enough to kill anything that moves
-				break
+/**
+ * Loads persistent data relevant to the current map: Objects, etc.
+ */
+/datum/controller/subsystem/persistence/proc/LoadMapPersistence()
+	return
 
-/datum/controller/subsystem/persistence/proc/LoadPoly()
-	for(var/mob/living/simple_animal/parrot/Poly/P in GLOB.alive_mob_list)
-		twitterize(P.speech_buffer, "polytalk")
-		break //Who's been duping the bird?!
+/**
+ * Saves persistent data relevant to the current map: Objects, etc.
+ */
+/datum/controller/subsystem/persistence/proc/SaveMapPersistence()
+	return
 
 /datum/controller/subsystem/persistence/proc/LoadChiselMessages()
 	var/list/saved_messages = list()
@@ -130,63 +145,6 @@ SUBSYSTEM_DEF(persistence)
 
 	log_world("Loaded [saved_messages.len] engraved messages on map [SSmapping.config.map_name]")
 
-/datum/controller/subsystem/persistence/proc/LoadTrophies()
-	if(fexists("data/npc_saves/TrophyItems.sav")) //legacy compatability to convert old format to new
-		var/savefile/S = new /savefile("data/npc_saves/TrophyItems.sav")
-		var/saved_json
-		S >> saved_json
-		if(!saved_json)
-			return
-		saved_trophies = json_decode(saved_json)
-		fdel("data/npc_saves/TrophyItems.sav")
-	else
-		var/json_file = file("data/npc_saves/TrophyItems.json")
-		if(!fexists(json_file))
-			return
-		var/list/json = json_decode(file2text(json_file))
-		if(!json)
-			return
-		saved_trophies = json["data"]
-	SetUpTrophies(saved_trophies.Copy())
-
-/datum/controller/subsystem/persistence/proc/LoadRecentModes()
-	var/json_file = file("data/RecentModes.json")
-	if(!fexists(json_file))
-		return
-	var/list/json = json_decode(file2text(json_file))
-	if(!json)
-		return
-	saved_modes = json["data"]
-
-/datum/controller/subsystem/persistence/proc/LoadRecentRulesets()
-	var/json_file = file("data/RecentRulesets.json")
-	if(!fexists(json_file))
-		return
-	var/list/json = json_decode(file2text(json_file))
-	if(!json)
-		return
-	saved_dynamic_rules = json["data"]
-
-/datum/controller/subsystem/persistence/proc/LoadRecentStorytellers()
-	var/json_file = file("data/RecentStorytellers.json")
-	if(!fexists(json_file))
-		return
-	var/list/json = json_decode(file2text(json_file))
-	if(!json)
-		return
-	saved_storytellers = json["data"]
-	if(saved_storytellers.len > 3)
-		average_dynamic_threat = saved_storytellers[4]
-	saved_storytellers.len = 3
-
-/datum/controller/subsystem/persistence/proc/LoadRecentMaps()
-	var/json_file = file("data/RecentMaps.json")
-	if(!fexists(json_file))
-		return
-	var/list/json = json_decode(file2text(json_file))
-	if(!json)
-		return
-	saved_maps = json["maps"]
 
 /datum/controller/subsystem/persistence/proc/LoadAntagReputation()
 	var/json = file2text(FILE_ANTAG_REP)
@@ -207,59 +165,6 @@ SUBSYSTEM_DEF(persistence)
 		return
 	saved_votes[ckey] = json["data"]
 
-/datum/controller/subsystem/persistence/proc/SetUpTrophies(list/trophy_items)
-	for(var/A in GLOB.trophy_cases)
-		var/obj/structure/displaycase/trophy/T = A
-		if (T.showpiece)
-			continue
-		T.added_roundstart = TRUE
-
-		var/trophy_data = pick_n_take(trophy_items)
-
-		if(!islist(trophy_data))
-			continue
-
-		var/list/chosen_trophy = trophy_data
-
-		if(!chosen_trophy || isemptylist(chosen_trophy)) //Malformed
-			continue
-
-		var/path = text2path(chosen_trophy["path"]) //If the item no longer exist, this returns null
-		if(!path)
-			continue
-
-		T.showpiece = new /obj/item/showpiece_dummy(T, path)
-		T.trophy_message = chosen_trophy["message"]
-		T.placer_key = chosen_trophy["placer_key"]
-		T.update_icon()
-
-/datum/controller/subsystem/persistence/proc/CollectData()
-	CollectChiselMessages()
-	CollectSecretSatchels()
-	CollectTrophies()
-	CollectRoundtype()
-	if(istype(SSticker.mode, /datum/game_mode/dynamic))
-		var/datum/game_mode/dynamic/mode = SSticker.mode
-		CollectStoryteller(mode)
-		CollectRulesets(mode)
-	RecordMaps()
-	SavePhotoPersistence()						//THIS IS PERSISTENCE, NOT THE LOGGING PORTION.
-	if(CONFIG_GET(flag/use_antag_rep))
-		CollectAntagReputation()
-	SaveRandomizedRecipes()
-	SavePanicBunker()
-	SavePaintings()
-	SaveScars()
-
-/datum/controller/subsystem/persistence/proc/LoadPanicBunker()
-	var/bunker_path = file("data/bunker_passthrough.json")
-	if(fexists(bunker_path))
-		var/list/json = json_decode(file2text(bunker_path))
-		GLOB.bunker_passthrough = json["data"]
-		for(var/ckey in GLOB.bunker_passthrough)
-			if(daysSince(GLOB.bunker_passthrough[ckey]) >= CONFIG_GET(number/max_bunker_days))
-				GLOB.bunker_passthrough -= ckey
-
 /datum/controller/subsystem/persistence/proc/GetPhotoAlbums()
 	var/album_path = file("data/photo_albums.json")
 	if(fexists(album_path))
@@ -329,35 +234,6 @@ SUBSYSTEM_DEF(persistence)
 
 	WRITE_FILE(frame_path, frame_json)
 
-/datum/controller/subsystem/persistence/proc/CollectSecretSatchels()
-	satchel_blacklist = typecacheof(list(/obj/item/stack/tile/plasteel, /obj/item/crowbar))
-	var/list/satchels_to_add = list()
-	for(var/A in new_secret_satchels)
-		var/obj/item/storage/backpack/satchel/flat/F = A
-		if(QDELETED(F) || F.z != SSmapping.station_start || F.invisibility != INVISIBILITY_MAXIMUM)
-			continue
-		var/list/savable_obj = list()
-		for(var/obj/O in F)
-			if(is_type_in_typecache(O, satchel_blacklist) || (O.flags_1 & ADMIN_SPAWNED_1))
-				continue
-			if(O.persistence_replacement)
-				savable_obj += O.persistence_replacement
-			else
-				savable_obj += O.type
-		if(isemptylist(savable_obj))
-			continue
-		var/list/data = list()
-		data["x"] = F.x
-		data["y"] = F.y
-		data["saved_obj"] = pick(savable_obj)
-		satchels_to_add += list(data)
-
-	var/json_file = file("data/npc_saves/SecretSatchels[SSmapping.config.map_name].json")
-	var/list/file_data = list()
-	fdel(json_file)
-	file_data["data"] = old_secret_satchels + satchels_to_add
-	WRITE_FILE(json_file, json_encode(file_data))
-
 /datum/controller/subsystem/persistence/proc/CollectChiselMessages()
 	var/json_file = file("data/npc_saves/ChiselMessages[SSmapping.config.map_name].json")
 
@@ -373,84 +249,6 @@ SUBSYSTEM_DEF(persistence)
 /datum/controller/subsystem/persistence/proc/SaveChiselMessage(obj/structure/chisel_message/M)
 	saved_messages += list(M.pack()) // dm eats one list
 
-
-/datum/controller/subsystem/persistence/proc/CollectTrophies()
-	var/json_file = file("data/npc_saves/TrophyItems.json")
-	var/list/file_data = list()
-	file_data["data"] = remove_duplicate_trophies(saved_trophies)
-	fdel(json_file)
-	WRITE_FILE(json_file, json_encode(file_data))
-
-/datum/controller/subsystem/persistence/proc/SavePanicBunker()
-	var/json_file = file("data/bunker_passthrough.json")
-	var/list/file_data = list()
-	file_data["data"] = GLOB.bunker_passthrough
-	fdel(json_file)
-	WRITE_FILE(json_file,json_encode(file_data))
-
-/datum/controller/subsystem/persistence/proc/remove_duplicate_trophies(list/trophies)
-	var/list/ukeys = list()
-	. = list()
-	for(var/trophy in trophies)
-		var/tkey = "[trophy["path"]]-[trophy["message"]]"
-		if(ukeys[tkey])
-			continue
-		else
-			. += list(trophy)
-			ukeys[tkey] = TRUE
-
-/datum/controller/subsystem/persistence/proc/SaveTrophy(obj/structure/displaycase/trophy/T)
-	if(!T.added_roundstart && T.showpiece)
-		var/list/data = list()
-		data["path"] = T.showpiece.type
-		data["message"] = T.trophy_message
-		data["placer_key"] = T.placer_key
-		saved_trophies += list(data)
-
-/datum/controller/subsystem/persistence/proc/CollectRoundtype()
-	saved_modes[3] = saved_modes[2]
-	saved_modes[2] = saved_modes[1]
-	saved_modes[1] = SSticker.mode.config_tag
-	var/json_file = file("data/RecentModes.json")
-	var/list/file_data = list()
-	file_data["data"] = saved_modes
-	fdel(json_file)
-	WRITE_FILE(json_file, json_encode(file_data))
-
-/datum/controller/subsystem/persistence/proc/CollectStoryteller(var/datum/game_mode/dynamic/mode)
-	saved_storytellers.len = 3
-	saved_storytellers[3] = saved_storytellers[2]
-	saved_storytellers[2] = saved_storytellers[1]
-	saved_storytellers[1] = mode.storyteller.name
-	average_dynamic_threat = (mode.max_threat + average_dynamic_threat) / 2
-	var/json_file = file("data/RecentStorytellers.json")
-	var/list/file_data = list()
-	file_data["data"] = saved_storytellers + average_dynamic_threat
-	fdel(json_file)
-	WRITE_FILE(json_file, json_encode(file_data))
-
-/datum/controller/subsystem/persistence/proc/CollectRulesets(var/datum/game_mode/dynamic/mode)
-	saved_dynamic_rules[3] = saved_dynamic_rules[2]
-	saved_dynamic_rules[2] = saved_dynamic_rules[1]
-	saved_dynamic_rules[1] = list()
-	for(var/r in mode.executed_rules)
-		var/datum/dynamic_ruleset/rule = r
-		saved_dynamic_rules[1] += rule.config_tag
-	var/json_file = file("data/RecentRulesets.json")
-	var/list/file_data = list()
-	file_data["data"] = saved_dynamic_rules
-	fdel(json_file)
-	WRITE_FILE(json_file, json_encode(file_data))
-
-/datum/controller/subsystem/persistence/proc/RecordMaps()
-	saved_maps = saved_maps?.len ? list("[SSmapping.config.map_name]") | saved_maps : list("[SSmapping.config.map_name]")
-	var/json_file = file("data/RecentMaps.json")
-	var/list/file_data = list()
-	file_data["maps"] = saved_maps
-	fdel(json_file)
-	WRITE_FILE(json_file, json_encode(file_data))
-
-
 /datum/controller/subsystem/persistence/proc/CollectAntagReputation()
 	var/ANTAG_REP_MAXIMUM = CONFIG_GET(number/antag_rep_maximum)
 
diff --git a/code/controllers/subsystem/persistence/cleanable_debris.dm b/code/controllers/subsystem/persistence/cleanable_debris.dm
new file mode 100644
index 0000000000..a0817c460b
--- /dev/null
+++ b/code/controllers/subsystem/persistence/cleanable_debris.dm
@@ -0,0 +1,177 @@
+/**
+ * Persistence for cleanable debris.
+ */
+/datum/controller/subsystem/persistence
+	/// tracks if we already loaded debris. Unlike everything else, this can actually be a major problem if some badmin procs it twice.
+	var/loaded_debris = FALSE
+
+/datum/controller/subsystem/persistence/LoadMapPersistence()
+	. = ..()
+	if(CONFIG_GET(flag/persistent_debris))
+		LoadMapDebris()
+
+/datum/controller/subsystem/persistence/SaveMapPersistence()
+	. = ..()
+	if(CONFIG_GET(flag/persistent_debris))
+		SaveMapDebris()
+
+/datum/controller/subsystem/persistence/proc/LoadMapDebris()
+	if(CONFIG_GET(flag/persistent_debris_only))
+		wipe_existing_debris()
+	if(!fexists("[get_map_persistence_path()]/debris.json"))
+		return
+	if(loaded_debris)
+		return
+	loaded_debris = TRUE
+	var/list/allowed_turf_typecache = typecacheof(/turf/open) - typecacheof(/turf/open/space)
+	var/list/allowed_z_cache = list()
+	for(var/z in SSmapping.levels_by_trait(ZTRAIT_STATION))
+		allowed_z_cache[num2text(z)] = TRUE
+	var/list/data = json_decode(file2text("[get_map_persistence_path()]/debris.json"))
+	var/list/z_lookup = list()
+	var/loaded = 0
+	var/list/loaded_by_type = list()
+	var/nopath = 0
+	var/badloc = 0
+	var/noturf = 0
+	/// reverse it
+	for(var/z in SSmapping.z_to_station_z_index)
+		var/sz = SSmapping.z_to_station_z_index[z]
+		z_lookup[num2text(sz)] = text2num(z)
+	for(var/z in data)
+		var/actual_z = z_lookup[z]
+		var/list/L1 = data[z]
+		for(var/x in L1)
+			var/list/L2 = data[z][x]
+			for(var/y in L2)
+				var/turf/tile = locate(text2num(x), text2num(y), actual_z)
+				if(!tile)
+					noturf++
+					continue
+				var/list/objects = data[z][x][y]
+				for(var/_L in objects)
+					var/list/objdata
+					var/path
+					if(islist(_L))
+						objdata = _L
+						path = text2path(objdata["__PATH__"])
+					else
+						path = text2path(_L)
+						objdata = objects[_L]
+					if(!path)
+						nopath++
+						continue
+					if(!IsValidDebrisLocation(tile, allowed_turf_typecache, allowed_z_cache, path, TRUE))
+						badloc++
+						continue
+					var/obj/effect/decal/cleanable/instantiated = new path(tile)
+					loaded_by_type[path] += 1
+					loaded++
+					if(objdata)
+						instantiated.PersistenceLoad(objdata)
+	var/list/bytype = list()
+	for(var/path in loaded_by_type)
+		bytype += "[path] - [loaded_by_type[path]]"
+	subsystem_log(
+	{"Debris loading completed:
+	Errors:
+	No path: [nopath]
+	Invalid location: [badloc]
+	No turf on map: [noturf]
+	Total loaded: [loaded]
+	By type:
+	[bytype.Join("\n")]"}
+	)
+
+/datum/controller/subsystem/persistence/proc/SaveMapDebris()
+	if(fexists("[get_map_persistence_path()]/debris.json"))
+		fdel("[get_map_persistence_path()]/debris.json")
+	if(CONFIG_GET(flag/persistent_debris_wipe_on_nuke) && station_was_destroyed)
+		return		// local janitor cheers on nukeop team to save some work
+	var/list/data = list()
+	var/list/z_lookup = SSmapping.z_to_station_z_index
+	var/list/debris = RelevantPersistentDebris()
+	var/obj/effect/decal/cleanable/saving
+	var/global_max = CONFIG_GET(number/persistent_debris_global_max)
+	var/type_max = CONFIG_GET(number/persistent_debris_type_max)
+	var/stored = 0
+	var/list/stored_by_type = list()
+	for(var/i in debris)
+		saving = i
+		var/list/serializing = list()
+		var/path = saving.PersistenceSave(serializing)
+		if(!path)
+			continue
+		if(stored_by_type[path] > type_max)
+			continue
+		var/text_z = num2text(z_lookup[num2text(saving.z)])
+		var/text_y = num2text(saving.y)
+		var/text_x = num2text(saving.x)
+		LAZYINITLIST(data[text_z])
+		LAZYINITLIST(data[text_z][text_x])
+		LAZYINITLIST(data[text_z][text_x][text_y])
+		if(saving.persistence_allow_stacking)
+			serializing["__PATH__"] = path
+			data[text_z][text_x][text_y] += list(serializing)
+		else
+			data[text_z][text_x][text_y][path] = serializing
+		stored++
+		if(stored > global_max)
+			var/w = "Persistent debris saving globally aborted due to global max >= [global_max]. Either janitors never do their jobs or something is wrong."
+			message_admins(w)
+			subsystem_log(w)
+			return
+		stored_by_type[path] = stored_by_type[path]? stored_by_type[path] + 1 : 1
+		if(stored_by_type[path] > type_max)
+			var/w = "Persistent debris saving aborted for type [path] due to type max >= [global_max]. Either janitors never do their jobs or something is wrong."
+			message_admins(w)
+			subsystem_log(w)
+
+	var/list/bytype = list()
+	for(var/path in stored_by_type)
+		bytype += "[path] - [stored_by_type[path]]"
+	subsystem_log(
+ 	{"Debris saving completed:
+	Total: [stored]
+	By type:
+	[bytype.Join("\n")]"}
+	)
+	WRITE_FILE(file("[get_map_persistence_path()]/debris.json"), json_encode(data))
+
+/datum/controller/subsystem/persistence/proc/IsValidDebrisLocation(turf/tile, list/allowed_typecache, list/allowed_zcache, obj/effect/decal/cleanable/type, loading = FALSE)
+	if(!allowed_typecache[tile.type])
+		return FALSE
+	var/area/A = tile.loc
+	if(!A.persistent_debris_allowed)
+		return FALSE
+	if(!allowed_zcache[num2text(tile.z)])
+		return FALSE
+	if(loading)
+		if(!initial(type.persistence_allow_stacking))
+			var/obj/effect/decal/cleanable/C = locate(type) in tile
+			if(!QDELETED(C))
+				return FALSE
+	// Saving verifies allow stacking in the save proc.
+	for(var/obj/structure/window/W in tile)
+		if(W.fulltile)
+			return FALSE
+	return TRUE
+
+/datum/controller/subsystem/persistence/proc/wipe_existing_debris()
+	var/list/existing = RelevantPersistentDebris()
+	QDEL_LIST(existing)
+
+/datum/controller/subsystem/persistence/proc/RelevantPersistentDebris()
+	var/list/allowed_turf_typecache = typecacheof(/turf/open) - typecacheof(/turf/open/space)
+	var/list/allowed_z_cache = list()
+	for(var/z in SSmapping.levels_by_trait(ZTRAIT_STATION))
+		allowed_z_cache[num2text(z)] = TRUE
+	. = list()
+	for(var/obj/effect/decal/cleanable/C in world)
+		if(!C.loc || QDELETED(C))
+			continue
+		if(!C.persistent)
+			continue
+		if(!IsValidDebrisLocation(C.loc, allowed_turf_typecache, allowed_z_cache, C.type, FALSE))
+			continue
+		. += C
diff --git a/code/controllers/subsystem/persistence/panic_bunker.dm b/code/controllers/subsystem/persistence/panic_bunker.dm
new file mode 100644
index 0000000000..93ada2835c
--- /dev/null
+++ b/code/controllers/subsystem/persistence/panic_bunker.dm
@@ -0,0 +1,26 @@
+/**
+ * Persists panic bunker whitelisting for a configured period of time
+ */
+/datum/controller/subsystem/persistence/LoadServerPersistence()
+	. = ..()
+	LoadPanicBunker()
+
+/datum/controller/subsystem/persistence/SaveServerPersistence()
+	. = ..()
+	SavePanicBunker()
+
+/datum/controller/subsystem/persistence/proc/LoadPanicBunker()
+	var/bunker_path = file("data/bunker_passthrough.json")
+	if(fexists(bunker_path))
+		var/list/json = json_decode(file2text(bunker_path))
+		GLOB.bunker_passthrough = json["data"]
+		for(var/ckey in GLOB.bunker_passthrough)
+			if(daysSince(GLOB.bunker_passthrough[ckey]) >= CONFIG_GET(number/max_bunker_days))
+				GLOB.bunker_passthrough -= ckey
+
+/datum/controller/subsystem/persistence/proc/SavePanicBunker()
+	var/json_file = file("data/bunker_passthrough.json")
+	var/list/file_data = list()
+	file_data["data"] = GLOB.bunker_passthrough
+	fdel(json_file)
+	WRITE_FILE(json_file,json_encode(file_data))
diff --git a/code/controllers/subsystem/persistence/poly_parrot.dm b/code/controllers/subsystem/persistence/poly_parrot.dm
new file mode 100644
index 0000000000..64743e9623
--- /dev/null
+++ b/code/controllers/subsystem/persistence/poly_parrot.dm
@@ -0,0 +1,11 @@
+/**
+ * Persists poly messages across rounds
+ */
+/datum/controller/subsystem/persistence/LoadGamePersistence()
+	. = ..()
+	LoadPoly()
+
+/datum/controller/subsystem/persistence/proc/LoadPoly()
+	for(var/mob/living/simple_animal/parrot/Poly/P in GLOB.alive_mob_list)
+		twitterize(P.speech_buffer, "polytalk")
+		break //Who's been duping the bird?!
diff --git a/code/controllers/subsystem/persistence/recent_votes_etc.dm b/code/controllers/subsystem/persistence/recent_votes_etc.dm
new file mode 100644
index 0000000000..f1b902d6ab
--- /dev/null
+++ b/code/controllers/subsystem/persistence/recent_votes_etc.dm
@@ -0,0 +1,107 @@
+/**
+ * Stores recently played gamemodes, maps, etc.
+ */
+/datum/controller/subsystem/persistence
+	var/list/saved_modes = list(1,2,3)
+	var/list/saved_dynamic_rules = list(list(),list(),list())
+	var/list/saved_storytellers = list("foo","bar","baz")
+	var/list/average_dynamic_threat = 50
+	var/list/saved_maps
+
+/datum/controller/subsystem/persistence/SaveServerPersistence()
+	. = ..()
+	CollectRoundtype()
+	if(istype(SSticker.mode, /datum/game_mode/dynamic))
+		var/datum/game_mode/dynamic/mode = SSticker.mode
+		CollectStoryteller(mode)
+		CollectRulesets(mode)
+	RecordMaps()
+
+/datum/controller/subsystem/persistence/LoadServerPersistence()
+	. = ..()
+	LoadRecentModes()
+	LoadRecentStorytellers()
+	LoadRecentRulesets()
+	LoadRecentMaps()
+
+/datum/controller/subsystem/persistence/proc/CollectRoundtype()
+	saved_modes[3] = saved_modes[2]
+	saved_modes[2] = saved_modes[1]
+	saved_modes[1] = SSticker.mode.config_tag
+	var/json_file = file("data/RecentModes.json")
+	var/list/file_data = list()
+	file_data["data"] = saved_modes
+	fdel(json_file)
+	WRITE_FILE(json_file, json_encode(file_data))
+
+/datum/controller/subsystem/persistence/proc/CollectStoryteller(var/datum/game_mode/dynamic/mode)
+	saved_storytellers.len = 3
+	saved_storytellers[3] = saved_storytellers[2]
+	saved_storytellers[2] = saved_storytellers[1]
+	saved_storytellers[1] = mode.storyteller.name
+	average_dynamic_threat = (mode.max_threat + average_dynamic_threat) / 2
+	var/json_file = file("data/RecentStorytellers.json")
+	var/list/file_data = list()
+	file_data["data"] = saved_storytellers + average_dynamic_threat
+	fdel(json_file)
+	WRITE_FILE(json_file, json_encode(file_data))
+
+/datum/controller/subsystem/persistence/proc/CollectRulesets(var/datum/game_mode/dynamic/mode)
+	saved_dynamic_rules[3] = saved_dynamic_rules[2]
+	saved_dynamic_rules[2] = saved_dynamic_rules[1]
+	saved_dynamic_rules[1] = list()
+	for(var/r in mode.executed_rules)
+		var/datum/dynamic_ruleset/rule = r
+		saved_dynamic_rules[1] += rule.config_tag
+	var/json_file = file("data/RecentRulesets.json")
+	var/list/file_data = list()
+	file_data["data"] = saved_dynamic_rules
+	fdel(json_file)
+	WRITE_FILE(json_file, json_encode(file_data))
+
+/datum/controller/subsystem/persistence/proc/RecordMaps()
+	saved_maps = saved_maps?.len ? list("[SSmapping.config.map_name]") | saved_maps : list("[SSmapping.config.map_name]")
+	var/json_file = file("data/RecentMaps.json")
+	var/list/file_data = list()
+	file_data["maps"] = saved_maps
+	fdel(json_file)
+	WRITE_FILE(json_file, json_encode(file_data))
+
+/datum/controller/subsystem/persistence/proc/LoadRecentModes()
+	var/json_file = file("data/RecentModes.json")
+	if(!fexists(json_file))
+		return
+	var/list/json = json_decode(file2text(json_file))
+	if(!json)
+		return
+	saved_modes = json["data"]
+
+/datum/controller/subsystem/persistence/proc/LoadRecentRulesets()
+	var/json_file = file("data/RecentRulesets.json")
+	if(!fexists(json_file))
+		return
+	var/list/json = json_decode(file2text(json_file))
+	if(!json)
+		return
+	saved_dynamic_rules = json["data"]
+
+/datum/controller/subsystem/persistence/proc/LoadRecentStorytellers()
+	var/json_file = file("data/RecentStorytellers.json")
+	if(!fexists(json_file))
+		return
+	var/list/json = json_decode(file2text(json_file))
+	if(!json)
+		return
+	saved_storytellers = json["data"]
+	if(saved_storytellers.len > 3)
+		average_dynamic_threat = saved_storytellers[4]
+	saved_storytellers.len = 3
+
+/datum/controller/subsystem/persistence/proc/LoadRecentMaps()
+	var/json_file = file("data/RecentMaps.json")
+	if(!fexists(json_file))
+		return
+	var/list/json = json_decode(file2text(json_file))
+	if(!json)
+		return
+	saved_maps = json["maps"]
diff --git a/code/controllers/subsystem/persistence/secret_satchels.dm b/code/controllers/subsystem/persistence/secret_satchels.dm
new file mode 100644
index 0000000000..fa2a445317
--- /dev/null
+++ b/code/controllers/subsystem/persistence/secret_satchels.dm
@@ -0,0 +1,79 @@
+/**
+ * Secret satchel persistence - allows storing of items in underfloor satchels that's loaded later.
+ */
+/datum/controller/subsystem/persistence
+	var/list/satchel_blacklist 		= list() //this is a typecache
+	var/list/new_secret_satchels 	= list() //these are objects
+	var/list/old_secret_satchels 	= list()
+
+/datum/controller/subsystem/persistence/LoadGamePersistence()
+	. = ..()
+	LoadSatchels()
+
+/datum/controller/subsystem/persistence/SaveGamePersistence()
+	. = ..()
+	CollectSecretSatchels()
+
+/datum/controller/subsystem/persistence/proc/LoadSatchels()
+	var/placed_satchel = 0
+	var/path
+
+	var/json_file = file("data/npc_saves/SecretSatchels[SSmapping.config.map_name].json")
+	var/list/json = list()
+	if(fexists(json_file))
+		json = json_decode(file2text(json_file))
+
+	old_secret_satchels = json["data"]
+	var/obj/item/storage/backpack/satchel/flat/F
+	if(old_secret_satchels && old_secret_satchels.len >= 10) //guards against low drop pools assuring that one player cannot reliably find his own gear.
+		var/pos = rand(1, old_secret_satchels.len)
+		F = new()
+		old_secret_satchels.Cut(pos, pos+1 % old_secret_satchels.len)
+		F.x = old_secret_satchels[pos]["x"]
+		F.y = old_secret_satchels[pos]["y"]
+		F.z = SSmapping.station_start
+		path = text2path(old_secret_satchels[pos]["saved_obj"])
+
+	if(F)
+		if(isfloorturf(F.loc) && !isplatingturf(F.loc))
+			F.hide(1)
+		if(ispath(path))
+			var/spawned_item = new path(F)
+			spawned_objects[spawned_item] = TRUE
+		placed_satchel++
+	var/free_satchels = 0
+	for(var/turf/T in shuffle(block(locate(TRANSITIONEDGE,TRANSITIONEDGE,SSmapping.station_start), locate(world.maxx-TRANSITIONEDGE,world.maxy-TRANSITIONEDGE,SSmapping.station_start)))) //Nontrivially expensive but it's roundstart only
+		if(isfloorturf(T) && !isplatingturf(T))
+			new /obj/item/storage/backpack/satchel/flat/secret(T)
+			free_satchels++
+			if((free_satchels + placed_satchel) == 10) //ten tiles, more than enough to kill anything that moves
+				break
+
+/datum/controller/subsystem/persistence/proc/CollectSecretSatchels()
+	satchel_blacklist = typecacheof(list(/obj/item/stack/tile/plasteel, /obj/item/crowbar))
+	var/list/satchels_to_add = list()
+	for(var/A in new_secret_satchels)
+		var/obj/item/storage/backpack/satchel/flat/F = A
+		if(QDELETED(F) || F.z != SSmapping.station_start || F.invisibility != INVISIBILITY_MAXIMUM)
+			continue
+		var/list/savable_obj = list()
+		for(var/obj/O in F)
+			if(is_type_in_typecache(O, satchel_blacklist) || (O.flags_1 & ADMIN_SPAWNED_1))
+				continue
+			if(O.persistence_replacement)
+				savable_obj += O.persistence_replacement
+			else
+				savable_obj += O.type
+		if(isemptylist(savable_obj))
+			continue
+		var/list/data = list()
+		data["x"] = F.x
+		data["y"] = F.y
+		data["saved_obj"] = pick(savable_obj)
+		satchels_to_add += list(data)
+
+	var/json_file = file("data/npc_saves/SecretSatchels[SSmapping.config.map_name].json")
+	var/list/file_data = list()
+	fdel(json_file)
+	file_data["data"] = old_secret_satchels + satchels_to_add
+	WRITE_FILE(json_file, json_encode(file_data))
diff --git a/code/controllers/subsystem/persistence/trophies.dm b/code/controllers/subsystem/persistence/trophies.dm
new file mode 100644
index 0000000000..770ca99125
--- /dev/null
+++ b/code/controllers/subsystem/persistence/trophies.dm
@@ -0,0 +1,84 @@
+/**
+ * Stores trophies in curator display cases
+ */
+/datum/controller/subsystem/persistence
+	var/list/saved_trophies = list()
+
+/datum/controller/subsystem/persistence/LoadGamePersistence()
+	. = ..()
+	LoadTrophies()
+
+/datum/controller/subsystem/persistence/SaveGamePersistence()
+	. = ..()
+	CollectTrophies()
+
+/datum/controller/subsystem/persistence/proc/LoadTrophies()
+	if(fexists("data/npc_saves/TrophyItems.sav")) //legacy compatability to convert old format to new
+		var/savefile/S = new /savefile("data/npc_saves/TrophyItems.sav")
+		var/saved_json
+		S >> saved_json
+		if(!saved_json)
+			return
+		saved_trophies = json_decode(saved_json)
+		fdel("data/npc_saves/TrophyItems.sav")
+	else
+		var/json_file = file("data/npc_saves/TrophyItems.json")
+		if(!fexists(json_file))
+			return
+		var/list/json = json_decode(file2text(json_file))
+		if(!json)
+			return
+		saved_trophies = json["data"]
+	SetUpTrophies(saved_trophies.Copy())
+
+/datum/controller/subsystem/persistence/proc/SetUpTrophies(list/trophy_items)
+	for(var/A in GLOB.trophy_cases)
+		var/obj/structure/displaycase/trophy/T = A
+		if (T.showpiece)
+			continue
+		T.added_roundstart = TRUE
+
+		var/trophy_data = pick_n_take(trophy_items)
+
+		if(!islist(trophy_data))
+			continue
+
+		var/list/chosen_trophy = trophy_data
+
+		if(!chosen_trophy || isemptylist(chosen_trophy)) //Malformed
+			continue
+
+		var/path = text2path(chosen_trophy["path"]) //If the item no longer exist, this returns null
+		if(!path)
+			continue
+
+		T.showpiece = new /obj/item/showpiece_dummy(T, path)
+		T.trophy_message = chosen_trophy["message"]
+		T.placer_key = chosen_trophy["placer_key"]
+		T.update_icon()
+
+/datum/controller/subsystem/persistence/proc/CollectTrophies()
+	var/json_file = file("data/npc_saves/TrophyItems.json")
+	var/list/file_data = list()
+	file_data["data"] = remove_duplicate_trophies(saved_trophies)
+	fdel(json_file)
+	WRITE_FILE(json_file, json_encode(file_data))
+
+/datum/controller/subsystem/persistence/proc/remove_duplicate_trophies(list/trophies)
+	var/list/ukeys = list()
+	. = list()
+	for(var/trophy in trophies)
+		var/tkey = "[trophy["path"]]-[trophy["message"]]"
+		if(ukeys[tkey])
+			continue
+		else
+			. += list(trophy)
+			ukeys[tkey] = TRUE
+
+/datum/controller/subsystem/persistence/proc/SaveTrophy(obj/structure/displaycase/trophy/T)
+	if(!T.added_roundstart && T.showpiece)
+		var/list/data = list()
+		data["path"] = T.showpiece.type
+		data["message"] = T.trophy_message
+		data["placer_key"] = T.placer_key
+		saved_trophies += list(data)
diff --git a/code/game/area/Space_Station_13_areas.dm b/code/game/area/Space_Station_13_areas.dm
index edd2047bd6..2c2cc46344 100644
--- a/code/game/area/Space_Station_13_areas.dm
+++ b/code/game/area/Space_Station_13_areas.dm
@@ -41,6 +41,7 @@ NOTE: there are two lists of areas in the end of this file: centcom and station
 	power_environ = FALSE
 	valid_territory = FALSE
 	outdoors = TRUE
+	persistent_debris_allowed = FALSE
 	ambientsounds = SPACE
 	blob_allowed = FALSE //Eating up space doesn't count for victory as a blob.
 	considered_hull_exterior = TRUE
diff --git a/code/game/area/areas.dm b/code/game/area/areas.dm
index b9415f3cf8..ff177898cb 100644
--- a/code/game/area/areas.dm
+++ b/code/game/area/areas.dm
@@ -24,6 +24,10 @@
 	var/clockwork_warp_allowed = TRUE
 	/// Message to display when the clockwork warp fails
 	var/clockwork_warp_fail = "The structure there is too dense for warping to pierce. (This is normal in high-security areas.)"
+	/// Persistent debris alowed
+	var/persistent_debris_allowed = TRUE
+	/// Dirty flooring allowed
+	var/dirt_buildup_allowed = TRUE
 
 	/// If mining tunnel generation is allowed in this area
 	var/tunnel_allowed = FALSE
diff --git a/code/game/objects/effects/decals/cleanable.dm b/code/game/objects/effects/decals/cleanable.dm
index 34996177af..5a6d5e54e9 100644
--- a/code/game/objects/effects/decals/cleanable.dm
+++ b/code/game/objects/effects/decals/cleanable.dm
@@ -1,6 +1,13 @@
 /obj/effect/decal/cleanable
 	gender = PLURAL
 	layer = ABOVE_NORMAL_TURF_LAYER
+	/// Is this kind of cleanable decal persistent
+	var/persistent = FALSE
+	/// Can we stack multiple in one tile?
+	var/persistence_allow_stacking = FALSE
+	/// Are we deleted by turf changes?
+	var/wiped_by_floor_change = FALSE
+
 	var/list/random_icon_states = null
 	var/blood_state = "" //I'm sorry but cleanable/blood code is ass, and so is blood_DNA
 	var/bloodiness = 0 //0-100, amount of blood in this decal, used for making footprints and affecting the alpha of bloody footprints
@@ -29,9 +36,21 @@
 
 	addtimer(CALLBACK(src, /datum.proc/_AddElement, list(/datum/element/beauty, beauty)), 0)
 
+/**
+ * A data list is passed into this.
+ * This should return null to skip saving, or the type of data to save. Type must be /cleanable.
+ */
+/obj/effect/decal/cleanable/proc/PersistenceSave(list/data)
+	return type
+
+/**
+ * Loads from a data list.
+ */
+/obj/effect/decal/cleanable/proc/PersistenceLoad(list/data)
+	return
+
 /obj/effect/decal/cleanable/proc/replace_decal(obj/effect/decal/cleanable/C) // Returns true if we should give up in favor of the pre-existing decal
-	if(mergeable_decal)
-		qdel(C)
+	return mergeable_decal
 
 /obj/effect/decal/cleanable/attackby(obj/item/W, mob/user, params)
 	if(istype(W, /obj/item/reagent_containers/glass) || istype(W, /obj/item/reagent_containers/food/drinks))
diff --git a/code/game/objects/effects/decals/cleanable/gibs.dm b/code/game/objects/effects/decals/cleanable/gibs.dm
index 7df0153ddc..4b63cbecc8 100644
--- a/code/game/objects/effects/decals/cleanable/gibs.dm
+++ b/code/game/objects/effects/decals/cleanable/gibs.dm
@@ -6,6 +6,7 @@
 	random_icon_states = list("gib1", "gib2", "gib3", "gib4", "gib5", "gib6")
 	mergeable_decal = FALSE
 	bloodiness = 0				//This isn't supposed to be bloody.
+	persistent = TRUE
 	var/body_colors = "#e3ba84"	//a default color just in case.
 	var/gibs_reagent_id = /datum/reagent/liquidgibs
 	var/gibs_bloodtype = "A+"
@@ -31,6 +32,10 @@
 	flesh.color = body_colors
 	add_overlay(flesh)
 
+/obj/effect/decal/cleanable/blood/gibs/PersistenceSave(list/data)
+	. = ..()
+	return /obj/effect/decal/cleanable/blood/gibs/old
+
 /obj/effect/decal/cleanable/blood/gibs/ex_act(severity, target)
 	return
 
@@ -159,6 +164,10 @@
 	. = ..()
 	update_icon()
 
+/obj/effect/decal/cleanable/blood/gibs/slime/PersistenceSave(list/data)
+	. = ..()
+	return type
+
 /obj/effect/decal/cleanable/blood/gibs/slime/update_icon()
 	add_atom_colour(body_colors, FIXED_COLOUR_PRIORITY)
 	cut_overlays()
@@ -198,6 +207,10 @@
 	. = ..()
 	update_icon()
 
+/obj/effect/decal/cleanable/blood/gibs/synth/PersistenceSave(list/data)
+	. = ..()
+	return type
+
 //IPCs
 /obj/effect/decal/cleanable/blood/gibs/ipc
 	desc = "They look sharp yet oozing."
@@ -209,6 +222,10 @@
 	. = ..()
 	update_icon()
 
+/obj/effect/decal/cleanable/blood/gibs/ipc/PersistenceSave(list/data)
+	. = ..()
+	return type
+
 /obj/effect/decal/cleanable/blood/gibs/ipc/update_icon()
 	add_atom_colour(blood_DNA_to_color(), FIXED_COLOUR_PRIORITY)
 	cut_overlays()
diff --git a/code/game/objects/effects/decals/cleanable/humans.dm b/code/game/objects/effects/decals/cleanable/humans.dm
index fa16a95faf..6d051b6c8c 100644
--- a/code/game/objects/effects/decals/cleanable/humans.dm
+++ b/code/game/objects/effects/decals/cleanable/humans.dm
@@ -8,12 +8,18 @@
 	bloodiness = BLOOD_AMOUNT_PER_DECAL
 	color = BLOOD_COLOR_HUMAN //default so we don't have white splotches everywhere.
 	beauty = -100
+	persistent = TRUE
+	var/fixed_color = FALSE
 
 /obj/effect/decal/cleanable/blood/replace_decal(obj/effect/decal/cleanable/blood/C)
+	if(C.fixed_color)
+		qdel(C)
+		return FALSE
 	if (C.blood_DNA)
 		blood_DNA |= C.blood_DNA
+	qdel(C)
 	update_icon()
-	..()
+	return FALSE
 
 /obj/effect/decal/cleanable/blood/transfer_blood_dna()
 	..()
@@ -24,7 +30,22 @@
 	update_icon()
 
 /obj/effect/decal/cleanable/blood/update_icon()
-	color = blood_DNA_to_color()
+	. = ..()
+	if(!fixed_color)
+		add_atom_colour(blood_DNA_to_color(), FIXED_COLOUR_PRIORITY)
+
+/obj/effect/decal/cleanable/blood/PersistenceSave(list/data)
+	. = ..()
+	data["color"] = color
+
+/obj/effect/decal/cleanable/blood/PersistenceLoad(list/data)
+	. = ..()
+	if(data["color"])
+		fixed_color = TRUE
+		add_atom_colour(data["color"], FIXED_COLOUR_PRIORITY)
+	name = "dried blood"
+	desc = "Looks like it's been here a while. Eew"
+	bloodiness = 0
 
 /obj/effect/decal/cleanable/blood/old
 	name = "dried blood"
@@ -38,6 +59,7 @@
 
 /obj/effect/decal/cleanable/blood/splats
 	random_icon_states = list("gibbl1", "gibbl2", "gibbl3", "gibbl4", "gibbl5")
+	persistence_allow_stacking = TRUE
 
 /obj/effect/decal/cleanable/blood/splatter
 	random_icon_states = list("splatter1", "splatter2", "splatter3", "splatter4", "splatter5")
@@ -48,16 +70,43 @@
 	random_icon_states = null
 	beauty = -50
 
+/obj/effect/decal/cleanable/blood/tracks/PersistenceSave(list/data)
+	. = ..()
+	data["dir"] = dir
+
+/obj/effect/decal/cleanable/blood/tracks/PersistenceLoad(list/data)
+	. = ..()
+	if(data["dir"])
+		setDir(text2num(data["dir"]))
+
 /obj/effect/decal/cleanable/trail_holder //not a child of blood on purpose
 	name = "blood"
 	icon_state = "ltrails_1"
 	desc = "Your instincts say you shouldn't be following these."
 	random_icon_states = null
 	beauty = -50
+	persistent = TRUE
+	persistence_allow_stacking = TRUE
 	var/list/existing_dirs = list()
+	var/fixed_color = FALSE
+
+/obj/effect/decal/cleanable/trail_holder/PersistenceSave(list/data)
+	. = ..()
+	data["dir"] = dir
+	data["color"] = color
+
+/obj/effect/decal/cleanable/trail_holder/PersistenceLoad(list/data)
+	. = ..()
+	if(data["dir"])
+		setDir(text2num(data["dir"]))
+	if(data["color"])
+		fixed_color = TRUE
+		add_atom_colour(data["color"], FIXED_COLOUR_PRIORITY)
 
 /obj/effect/decal/cleanable/trail_holder/update_icon()
-	color = blood_DNA_to_color()
+	. = ..()
+	if(!fixed_color)
+		add_atom_colour(blood_DNA_to_color(), FIXED_COLOUR_PRIORITY)
 
 /obj/effect/cleanable/trail_holder/Initialize()
 	. = ..()
@@ -84,8 +133,19 @@
 	var/entered_dirs = 0
 	var/exited_dirs = 0
 	blood_state = BLOOD_STATE_BLOOD //the icon state to load images from
+	persistent = TRUE
+	persistence_allow_stacking = TRUE
 	var/list/shoe_types = list()
 
+/obj/effect/decal/cleanable/blood/footprints/PersistenceSave(list/data)
+	. = ..()
+	data["dir"] = dir
+
+/obj/effect/decal/cleanable/blood/footprints/PersistenceLoad(list/data)
+	. = ..()
+	if(data["dir"])
+		setDir(text2num(data["dir"]))
+
 /obj/effect/decal/cleanable/blood/footprints/Crossed(atom/movable/O)
 	if(ishuman(O))
 		var/mob/living/carbon/human/H = O
@@ -143,7 +203,7 @@
 		return
 	if(color != C.color)
 		return
-	..()
+	return ..()
 
 /obj/effect/decal/cleanable/blood/footprints/can_bloodcrawl_in()
 	if((blood_state != BLOOD_STATE_OIL) && (blood_state != BLOOD_STATE_NOT_BLOODY))
diff --git a/code/game/objects/effects/decals/cleanable/misc.dm b/code/game/objects/effects/decals/cleanable/misc.dm
index 044c5c6e86..0f7d7c185d 100644
--- a/code/game/objects/effects/decals/cleanable/misc.dm
+++ b/code/game/objects/effects/decals/cleanable/misc.dm
@@ -12,6 +12,8 @@
 	icon_state = "ash"
 	mergeable_decal = FALSE
 	beauty = -50
+	persistent = TRUE
+	persistence_allow_stacking = TRUE
 
 /obj/effect/decal/cleanable/ash/Initialize()
 	. = ..()
@@ -38,6 +40,8 @@
 	icon = 'icons/obj/shards.dmi'
 	icon_state = "tiny"
 	beauty = -100
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/glass/Initialize()
 	. = ..()
@@ -53,10 +57,33 @@
 	name = "dirt"
 	desc = "Someone should clean that up."
 	icon_state = "dirt"
+	alpha = 127
 	canSmoothWith = list(/obj/effect/decal/cleanable/dirt, /turf/closed/wall, /obj/structure/falsewall)
 	smooth = SMOOTH_FALSE
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	beauty = -75
+	mergeable_decal = TRUE
+	persistent = TRUE
+	wiped_by_floor_change = TRUE
+
+/obj/effect/decal/cleanable/dirt/Initialize(mapload)
+	. = ..()
+	alpha = CONFIG_GET(number/dirt_alpha_starting)
+
+/obj/effect/decal/cleanable/dirt/proc/dirty(strength = 1)
+	if(alpha < 255)
+		alpha += strength
+		if(alpha > 255)
+			alpha = 255
+
+/obj/effect/decal/cleanable/dirt/PersistenceSave(list/data)
+	. = ..()
+	data["alpha"] = alpha
+
+/obj/effect/decal/cleanable/dirt/PersistenceLoad(list/data)
+	. = ..()
+	if(data["alpha"])
+		alpha = text2num(data["alpha"])
 
 /obj/effect/decal/cleanable/dirt/Initialize()
 	. = ..()
@@ -94,6 +121,8 @@
 	light_color = LIGHT_COLOR_GREEN
 	icon_state = "greenglow"
 	beauty = -300
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/greenglow/Initialize(mapload)
 	. = ..()
@@ -122,6 +151,8 @@
 	icon_state = "molten"
 	mergeable_decal = FALSE
 	beauty = -150
+	persistent = TRUE
+	persistence_allow_stacking = TRUE
 
 /obj/effect/decal/cleanable/molten_object/large
 	name = "big gooey grey mass"
@@ -136,6 +167,7 @@
 	icon_state = "vomit_1"
 	random_icon_states = list("vomit_1", "vomit_2", "vomit_3", "vomit_4")
 	beauty = -150
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/vomit/on_attack_hand(mob/user, act_intent = user.a_intent, unarmed_attack_flags)
 	if(ishuman(user))
@@ -151,6 +183,10 @@
 			reagents.trans_to(H, reagents.total_volume)
 			qdel(src)
 
+/obj/effect/decal/cleanable/vomit/PersistenceSave(list/data)
+	. = ..()
+	return /obj/effect/decal/cleanable/vomit/old
+
 /obj/effect/decal/cleanable/vomit/old
 	name = "crusty dried vomit"
 	desc = "You try not to look at the chunks, and fail."
@@ -166,12 +202,16 @@
 	icon = 'icons/effects/tomatodecal.dmi'
 	random_icon_states = list("tomato_floor1", "tomato_floor2", "tomato_floor3")
 	beauty = -100
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/plant_smudge
 	name = "plant smudge"
 	gender = NEUTER
 	icon = 'icons/effects/tomatodecal.dmi'
 	random_icon_states = list("smashed_plant")
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/egg_smudge
 	name = "smashed egg"
@@ -179,6 +219,8 @@
 	gender = NEUTER
 	icon = 'icons/effects/tomatodecal.dmi'
 	random_icon_states = list("smashed_egg1", "smashed_egg2", "smashed_egg3")
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/pie_smudge //honk
 	name = "smashed pie"
@@ -186,6 +228,8 @@
 	gender = NEUTER
 	icon = 'icons/effects/tomatodecal.dmi'
 	random_icon_states = list("smashed_pie")
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/chem_pile
 	name = "chemical pile"
@@ -193,6 +237,8 @@
 	gender = NEUTER
 	icon = 'icons/obj/objects.dmi'
 	icon_state = "ash"
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/shreds
 	name = "shreds"
@@ -200,6 +246,8 @@
 	icon_state = "shreds"
 	gender = PLURAL
 	mergeable_decal = FALSE
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/shreds/ex_act(severity, target)
 	if(severity == 1) //so shreds created during an explosion aren't deleted by the explosion.
@@ -222,6 +270,8 @@
 	desc = "The herpes of arts and crafts."
 	icon = 'icons/effects/atmospherics.dmi'
 	gender = NEUTER
+	mergeable_decal = TRUE
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/glitter/pink
 	name = "pink glitter"
@@ -247,3 +297,5 @@
 	icon = 'icons/effects/blood.dmi'
 	icon_state = "xfloor1"
 	random_icon_states = list("xfloor1", "xfloor2", "xfloor3", "xfloor4", "xfloor5", "xfloor6", "xfloor7")
+	mergeable_decal = TRUE
+	persistent = TRUE
diff --git a/code/game/objects/effects/decals/cleanable/robots.dm b/code/game/objects/effects/decals/cleanable/robots.dm
index 2765330977..8f8f27c3c6 100644
--- a/code/game/objects/effects/decals/cleanable/robots.dm
+++ b/code/game/objects/effects/decals/cleanable/robots.dm
@@ -11,6 +11,7 @@
 	bloodiness = BLOOD_AMOUNT_PER_DECAL
 	mergeable_decal = FALSE
 	beauty = -50
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/robot_debris/Initialize(mapload, list/datum/disease/diseases)
 	. = ..()
@@ -52,6 +53,7 @@
 	blood_state = BLOOD_STATE_OIL
 	bloodiness = BLOOD_AMOUNT_PER_DECAL
 	beauty = -100
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/oil/Initialize()
 	. = ..()
@@ -61,8 +63,10 @@
 /obj/effect/decal/cleanable/oil/streak
 	random_icon_states = list("streak1", "streak2", "streak3", "streak4", "streak5")
 	beauty = -50
+	persistent = TRUE
 
 /obj/effect/decal/cleanable/oil/slippery
+	persistent = FALSE
 
 /obj/effect/decal/cleanable/oil/slippery/Initialize()
 	AddComponent(/datum/component/slippery, 80, (NO_SLIP_WHEN_WALKING | SLIDE))
diff --git a/code/game/objects/effects/decals/crayon.dm b/code/game/objects/effects/decals/crayon.dm
index 8cfdad0432..387b8c167d 100644
--- a/code/game/objects/effects/decals/crayon.dm
+++ b/code/game/objects/effects/decals/crayon.dm
@@ -5,6 +5,8 @@
 	icon_state = "rune1"
 	plane = ABOVE_WALL_PLANE //makes the graffiti visible over a wall.
 	gender = NEUTER
+	persistent = TRUE
+	persistence_allow_stacking = TRUE
 	mergeable_decal = FALSE
 	var/do_icon_rotate = TRUE
 	var/rotation = 0
@@ -29,3 +31,35 @@
 	if(main)
 		paint_colour = main
 	add_atom_colour(paint_colour, FIXED_COLOUR_PRIORITY)
+
+/obj/effect/decal/cleanable/crayon/PersistenceSave(list/data)
+	. = ..()
+	if(icon != initial(icon))	// no support for alticons yet, awful system anyways
+		return null
+	data["icon_state"] = icon_state
+	data["paint_color"] = paint_colour
+	if(do_icon_rotate)
+		data["rotation"] = rotation
+	data["name"] = name
+	if(pixel_x != initial(pixel_x))
+		data["pixel_x"] = pixel_x
+	if(pixel_y != initial(pixel_y))
+		data["pixel_y"] = pixel_y
+
+/obj/effect/decal/cleanable/crayon/PersistenceLoad(list/data)
+	. = ..()
+	if(data["name"])
+		name = data["name"]
+	if(do_icon_rotate && data["rotation"])
+		var/matrix/M = matrix()
+		M.Turn(text2num(data["rotation"]))
+		transform = M
+	if(data["paint_color"])
+		paint_colour = data["paint_color"]
+		add_atom_colour(paint_colour, FIXED_COLOUR_PRIORITY)
+	if(data["icon_state"])
+		icon_state = data["icon_state"]
+	if(data["pixel_x"])
+		pixel_x = data["pixel_x"]
+	if(data["pixel_y"])
+		pixel_y = data["pixel_y"]
diff --git a/code/game/turfs/open.dm b/code/game/turfs/open.dm
index 493e88d442..7e00b1cf63 100644
--- a/code/game/turfs/open.dm
+++ b/code/game/turfs/open.dm
@@ -1,5 +1,12 @@
 /turf/open
 	plane = FLOOR_PLANE
+	/// Does dirt buildup happen on us?
+	var/dirt_buildup_allowed = FALSE
+	/// Dirt level.
+	var/dirtyness = 0
+	/// Dirt level to spawn dirt. Null to use config.
+	var/dirt_spawn_threshold
+	/// Slowdown applied to mobs on us.
 	var/slowdown = 0 //negative for faster, positive for slower
 
 	var/postdig_icon_change = FALSE
diff --git a/code/game/turfs/simulated/chasm.dm b/code/game/turfs/simulated/chasm.dm
index 5e8f55feed..9490d728fe 100644
--- a/code/game/turfs/simulated/chasm.dm
+++ b/code/game/turfs/simulated/chasm.dm
@@ -9,6 +9,7 @@
 	canSmoothWith = list(/turf/open/floor/fakepit, /turf/open/chasm)
 	density = TRUE //This will prevent hostile mobs from pathing into chasms, while the canpass override will still let it function like an open turf
 	bullet_bounce_sound = null //abandon all hope ye who enter
+	dirt_buildup_allowed = FALSE
 
 /turf/open/chasm/Initialize()
 	. = ..()
diff --git a/code/game/turfs/simulated/dirtystation.dm b/code/game/turfs/simulated/dirtystation.dm
index e29d75a248..add8467ceb 100644
--- a/code/game/turfs/simulated/dirtystation.dm
+++ b/code/game/turfs/simulated/dirtystation.dm
@@ -8,6 +8,9 @@
 //Making the station dirty, one tile at a time. Called by master controller's setup_objects
 
 /turf/open/floor/proc/MakeDirty()
+	if(CONFIG_GET(flag/persistent_debris_only))
+		return
+
 	if(prob(66))	//fastest possible exit 2/3 of the time
 		return
 
@@ -38,7 +41,7 @@
 		return
 
 		//Construction zones. Blood, sweat, and oil.  Oh, and dirt.
-	var/static/list/engine_dirt_areas = typecacheof(list(/area/engine,			
+	var/static/list/engine_dirt_areas = typecacheof(list(/area/engine,
 														/area/crew_quarters/heads/chief,
 														/area/ruin/space/derelict/assembly_line,
 														/area/science/robotics,
diff --git a/code/game/turfs/simulated/floor.dm b/code/game/turfs/simulated/floor.dm
index ddec9750d9..6a4ddea63b 100644
--- a/code/game/turfs/simulated/floor.dm
+++ b/code/game/turfs/simulated/floor.dm
@@ -5,6 +5,7 @@
 	name = "floor"
 	icon = 'icons/turf/floors.dmi'
 	baseturfs = /turf/open/floor/plating
+	dirt_buildup_allowed = TRUE
 
 	footstep = FOOTSTEP_FLOOR
 	barefootstep = FOOTSTEP_HARD_BAREFOOT
@@ -137,6 +138,9 @@
 	burnt = 1
 
 /turf/open/floor/proc/make_plating()
+	for(var/obj/effect/decal/cleanable/C in src)
+		if(C.wiped_by_floor_change)
+			qdel(C)
 	return ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 
 /turf/open/floor/ChangeTurf(path, new_baseturf, flags)
diff --git a/code/game/turfs/simulated/floor/plating.dm b/code/game/turfs/simulated/floor/plating.dm
index 35ee06a584..ad3cf86864 100644
--- a/code/game/turfs/simulated/floor/plating.dm
+++ b/code/game/turfs/simulated/floor/plating.dm
@@ -61,6 +61,9 @@
 			to_chat(user, "<span class='notice'>You begin reinforcing the floor...</span>")
 			if(do_after(user, 30, target = src))
 				if (R.get_amount() >= 2 && !istype(src, /turf/open/floor/engine))
+					for(var/obj/effect/decal/cleanable/decal in src)
+						if(decal.wiped_by_floor_change)
+							qdel(decal)
 					PlaceOnTop(/turf/open/floor/engine, flags = CHANGETURF_INHERIT_AIR)
 					playsound(src, 'sound/items/deconstruct.ogg', 80, 1)
 					R.use(2)
@@ -78,6 +81,9 @@
 			to_chat(user, "<span class='notice'>You begin adding glass to the floor...</span>")
 			if(do_after(user, 5, target = src))
 				if (G.get_amount() >= 2 && !istype(src, /turf/open/transparent/glass))
+					for(var/obj/effect/decal/cleanable/decal in src)
+						if(decal.wiped_by_floor_change)
+							qdel(decal)
 					PlaceOnTop(/turf/open/transparent/glass, flags = CHANGETURF_INHERIT_AIR)
 					playsound(src, 'sound/items/deconstruct.ogg', 80, 1)
 					G.use(2)
@@ -95,6 +101,9 @@
 			to_chat(user, "<span class='notice'>You begin adding reinforced glass to the floor...</span>")
 			if(do_after(user, 10, target = src))
 				if (RG.get_amount() >= 2 && !istype(src, /turf/open/transparent/glass/reinforced))
+					for(var/obj/effect/decal/cleanable/decal in src)
+						if(decal.wiped_by_floor_change)
+							qdel(decal)
 					PlaceOnTop(/turf/open/transparent/glass/reinforced, flags = CHANGETURF_INHERIT_AIR)
 					playsound(src, 'sound/items/deconstruct.ogg', 80, 1)
 					RG.use(2)
@@ -110,6 +119,9 @@
 			var/obj/item/stack/tile/W = C
 			if(!W.use(1))
 				return
+			for(var/obj/effect/decal/cleanable/decal in src)
+				if(decal.wiped_by_floor_change)
+					qdel(decal)
 			if(istype(W, /obj/item/stack/tile/material))
 				var/turf/newturf = PlaceOnTop(/turf/open/floor/material, flags = CHANGETURF_INHERIT_AIR)
 				newturf.set_custom_materials(W.custom_materials)
diff --git a/code/game/turfs/simulated/floor/reinf_floor.dm b/code/game/turfs/simulated/floor/reinf_floor.dm
index 42b4707b50..f8c6ff1ce2 100644
--- a/code/game/turfs/simulated/floor/reinf_floor.dm
+++ b/code/game/turfs/simulated/floor/reinf_floor.dm
@@ -43,6 +43,9 @@
 			return TRUE
 		if(floor_tile)
 			new floor_tile(src, 2)
+		for(var/obj/effect/decal/cleanable/C in src)
+			if(C.wiped_by_floor_change)
+				qdel(C)
 		ScrapeAway(flags = CHANGETURF_INHERIT_AIR)
 	return TRUE
 
diff --git a/code/game/turfs/simulated/lava.dm b/code/game/turfs/simulated/lava.dm
index 2f223f2c40..e7471478fb 100644
--- a/code/game/turfs/simulated/lava.dm
+++ b/code/game/turfs/simulated/lava.dm
@@ -6,6 +6,7 @@
 	gender = PLURAL //"That's some lava."
 	baseturfs = /turf/open/lava //lava all the way down
 	slowdown = 2
+	dirt_buildup_allowed = FALSE
 
 	light_range = 2
 	light_power = 0.75
diff --git a/code/game/turfs/simulated/reebe_void.dm b/code/game/turfs/simulated/reebe_void.dm
index 14aa02065d..3f3bf31f9b 100644
--- a/code/game/turfs/simulated/reebe_void.dm
+++ b/code/game/turfs/simulated/reebe_void.dm
@@ -6,6 +6,7 @@
 	planetary_atmos = TRUE
 	bullet_bounce_sound = null //forever falling
 	tiled_dirt = FALSE
+	dirt_buildup_allowed = FALSE
 
 /turf/open/indestructible/reebe_void/Initialize(mapload)
 	. = ..()
diff --git a/code/game/turfs/space/space.dm b/code/game/turfs/space/space.dm
index 765c88842e..9c9639e57c 100644
--- a/code/game/turfs/space/space.dm
+++ b/code/game/turfs/space/space.dm
@@ -3,6 +3,7 @@
 	icon_state = "0"
 	name = "\proper space"
 	intact = 0
+	dirt_buildup_allowed = FALSE
 
 	temperature = TCMB
 	thermal_conductivity = OPEN_HEAT_TRANSFER_COEFFICIENT
diff --git a/code/modules/antagonists/clockcult/clock_structures/ratvar_the_clockwork_justicar.dm b/code/modules/antagonists/clockcult/clock_structures/ratvar_the_clockwork_justicar.dm
index 73ae89a19b..28901ea0b2 100644
--- a/code/modules/antagonists/clockcult/clock_structures/ratvar_the_clockwork_justicar.dm
+++ b/code/modules/antagonists/clockcult/clock_structures/ratvar_the_clockwork_justicar.dm
@@ -30,6 +30,7 @@
 	var/mutable_appearance/alert_overlay = mutable_appearance('icons/effects/clockwork_effects.dmi', "ratvar_alert")
 	notify_ghosts("The Justiciar's light calls to you! Reach out to Ratvar in [get_area_name(src)] to be granted a shell to spread his glory!", null, source = src, alert_overlay = alert_overlay)
 	INVOKE_ASYNC(SSshuttle.emergency, /obj/docking_port/mobile/emergency.proc/request, null, 10, null, FALSE, 0)
+	SSpersistence.station_was_destroyed = TRUE
 
 /obj/structure/destructible/clockwork/massive/ratvar/Destroy()
 	GLOB.ratvar_awakens--
diff --git a/code/modules/mapping/map_config.dm b/code/modules/mapping/map_config.dm
index d18ca1e1e3..1f4b558e21 100644
--- a/code/modules/mapping/map_config.dm
+++ b/code/modules/mapping/map_config.dm
@@ -18,6 +18,8 @@
 	var/map_name = "Box Station"
 	var/map_path = "map_files/BoxStation"
 	var/map_file = "BoxStation.dmm"
+	/// Persistence key: Defaults to ckey(map_name). If set to "NO_PERSIST", this map will have NO persistence.
+	var/persistence_key
 
 	var/traits = null
 	var/space_ruin_levels = 4
@@ -99,6 +101,16 @@
 	map_path = json["map_path"]
 
 	map_file = json["map_file"]
+
+	persistence_key = ckey(map_name)
+
+	var/json_persistence_key = json["persistence_key"]
+	if(json_persistence_key)
+		if(json_persistence_key == "NO_PERSIST")
+			persistence_key = null
+		else
+			persistence_key = json_persistence_key
+
 	// "map_file": "BoxStation.dmm"
 	if (istext(map_file))
 		if (!fexists("_maps/[map_path]/[map_file]"))
diff --git a/code/modules/mob/living/carbon/human/human_defines.dm b/code/modules/mob/living/carbon/human/human_defines.dm
index 341aa6a30f..a82151cc1d 100644
--- a/code/modules/mob/living/carbon/human/human_defines.dm
+++ b/code/modules/mob/living/carbon/human/human_defines.dm
@@ -15,6 +15,7 @@
 
 	block_parry_data = /datum/block_parry_data/unarmed/human
 	default_block_parry_data = /datum/block_parry_data/unarmed/human
+	causes_dirt_buildup_on_floor = TRUE
 
 	//Hair colour and style
 	var/hair_color = "000"
diff --git a/code/modules/mob/living/carbon/human/human_movement.dm b/code/modules/mob/living/carbon/human/human_movement.dm
index 509633c0d5..440400f889 100644
--- a/code/modules/mob/living/carbon/human/human_movement.dm
+++ b/code/modules/mob/living/carbon/human/human_movement.dm
@@ -100,3 +100,8 @@
 	if(dna.species.space_move(src))
 		return TRUE
 	return ..()
+
+/mob/living/carbon/human/dirt_buildup(strength)
+	if(!shoes || !(shoes.body_parts_covered & FEET))
+		return	// barefoot advantage
+	return ..()
diff --git a/code/modules/mob/living/living_defines.dm b/code/modules/mob/living/living_defines.dm
index d4ccc63b34..742d4d8624 100644
--- a/code/modules/mob/living/living_defines.dm
+++ b/code/modules/mob/living/living_defines.dm
@@ -63,6 +63,8 @@
 	//Allows mobs to move through dense areas without restriction. For instance, in space or out of holder objects.
 	var/incorporeal_move = FALSE //FALSE is off, INCORPOREAL_MOVE_BASIC is normal, INCORPOREAL_MOVE_SHADOW is for ninjas
 								 //and INCORPOREAL_MOVE_JAUNT is blocked by holy water/salt
+	/// Do we make floors dirty as we move?
+	var/causes_dirt_buildup_on_floor = FALSE
 
 	var/list/roundstart_quirks = list()
 
diff --git a/code/modules/mob/living/living_movement.dm b/code/modules/mob/living/living_movement.dm
index 0cdfe9dbf2..9e093d391e 100644
--- a/code/modules/mob/living/living_movement.dm
+++ b/code/modules/mob/living/living_movement.dm
@@ -101,7 +101,30 @@
 
 	if(lying && !buckled && prob(getBruteLoss()*200/maxHealth))
 		makeTrail(newloc, T, old_direction)
+	if(causes_dirt_buildup_on_floor && (movement_type & GROUND))
+		dirt_buildup()
 
+/**
+ * Attempts to make the floor dirty.
+ */
+/mob/living/proc/dirt_buildup(strength = 1)
+	var/turf/open/T = loc
+	if(!istype(T) || !T.dirt_buildup_allowed)
+		return
+	var/area/A = T.loc
+	if(!A.dirt_buildup_allowed)
+		return
+	var/multiplier = CONFIG_GET(number/turf_dirty_multiplier)
+	strength *= multiplier
+	var/obj/effect/decal/cleanable/dirt/D = locate() in T
+	if(D)
+		D.dirty(strength)
+	else
+		T.dirtyness += strength
+		if(T.dirtyness >= (isnull(T.dirt_spawn_threshold)? CONFIG_GET(number/turf_dirt_threshold) : T.dirt_spawn_threshold))
+			D = new /obj/effect/decal/cleanable/dirt(T)
+			D.dirty(T.dirt_spawn_threshold - T.dirtyness)
+			T.dirtyness = 0		// reset.
 
 /mob/living/Move_Pulled(atom/A)
 	. = ..()
diff --git a/code/modules/power/singularity/narsie.dm b/code/modules/power/singularity/narsie.dm
index 8bf20fddc6..5b5292a020 100644
--- a/code/modules/power/singularity/narsie.dm
+++ b/code/modules/power/singularity/narsie.dm
@@ -78,6 +78,7 @@
 	set_security_level("delta")
 	SSshuttle.registerHostileEnvironment(src)
 	SSshuttle.lockdown = TRUE
+	SSpersistence.station_was_destroyed = TRUE
 	sleep(600)
 	if(resolved == FALSE)
 		resolved = TRUE
diff --git a/config/config.txt b/config/config.txt
index 72df74beb1..c7bb36af0e 100644
--- a/config/config.txt
+++ b/config/config.txt
@@ -11,6 +11,7 @@ $include dynamic_config.txt
 $include plushies/defines.txt
 $include job_threats.txt
 $include policy.txt
+$include persistence.txt
 $include respawns.txt
 
 # You can use the @ character at the beginning of a config option to lock it from being edited in-game
diff --git a/config/game_options.txt b/config/game_options.txt
index bc5fdf940e..3c53d9fecb 100644
--- a/config/game_options.txt
+++ b/config/game_options.txt
@@ -668,4 +668,10 @@ ALLOW_CUSTOM_SKINTONES
 
 ## Enables the FoV component, which hides objects and mobs behind the parent from their sight, unless they turn around, duh.
 ## Camera mobs, AIs, ghosts and some other are of course exempt from this. This also doesn't influence simplemob AI, for the best.
-#USE_FIELD_OF_VISION
\ No newline at end of file
+#USE_FIELD_OF_VISION
+
+## Default turf threshold to get dirt
+TURF_DIRT_THRESHOLD 100
+
+## Default alpha of dirt on spawn
+DIRT_ALPHA_STARTING 127
diff --git a/config/persistence.txt b/config/persistence.txt
new file mode 100644
index 0000000000..7d65a150e2
--- /dev/null
+++ b/config/persistence.txt
@@ -0,0 +1,14 @@
+### Whether or not cleanable object persistence is on
+PERSISTENT_DEBRIS
+
+### Whether or not ONLY persistent cleanable objects should be spawned, for supported objects
+PERSISTENT_DEBRIS_ONLY
+
+### Max objects to store, total
+PERSISTENT_DEBRIS_GLOBAL_MAX 10000
+
+### Max objects to store per type, total
+PERSISTENT_DEBRIS_TYPE_MAX 2000
+
+### Wipe objects on nuke for the above
+PERSISTENT_DEBRIS_WIPE_ON_NUKE
diff --git a/tgstation.dme b/tgstation.dme
index 04cadaef0e..3d2c19866a 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -292,6 +292,7 @@
 #include "code\controllers\configuration\entries\fail2topic.dm"
 #include "code\controllers\configuration\entries\game_options.dm"
 #include "code\controllers\configuration\entries\general.dm"
+#include "code\controllers\configuration\entries\persistence.dm"
 #include "code\controllers\configuration\entries\plushies.dm"
 #include "code\controllers\configuration\entries\policy.dm"
 #include "code\controllers\configuration\entries\resources.dm"
@@ -340,7 +341,6 @@
 #include "code\controllers\subsystem\pai.dm"
 #include "code\controllers\subsystem\parallax.dm"
 #include "code\controllers\subsystem\pathfinder.dm"
-#include "code\controllers\subsystem\persistence.dm"
 #include "code\controllers\subsystem\profiler.dm"
 #include "code\controllers\subsystem\radiation.dm"
 #include "code\controllers\subsystem\radio.dm"
@@ -363,6 +363,13 @@
 #include "code\controllers\subsystem\vis_overlays.dm"
 #include "code\controllers\subsystem\vore.dm"
 #include "code\controllers\subsystem\vote.dm"
+#include "code\controllers\subsystem\persistence\_persistence.dm"
+#include "code\controllers\subsystem\persistence\cleanable_debris.dm"
+#include "code\controllers\subsystem\persistence\panic_bunker.dm"
+#include "code\controllers\subsystem\persistence\poly_parrot.dm"
+#include "code\controllers\subsystem\persistence\recent_votes_etc.dm"
+#include "code\controllers\subsystem\persistence\secret_satchels.dm"
+#include "code\controllers\subsystem\persistence\trophies.dm"
 #include "code\controllers\subsystem\processing\chemistry.dm"
 #include "code\controllers\subsystem\processing\circuit.dm"
 #include "code\controllers\subsystem\processing\fastprocess.dm"