Rain v1

code/game/gamemodes/dynamic/dynamic_rulesets_events.dm

@@ -777,4 +777,14 @@
 	weight = 5
 	repeatable = TRUE
 	repeatable_weight_decrease = 3
-	occurances_max = 3
+	occurances_max = 3
+
+/datum/dynamic_ruleset/event/oxygen_rain
+	name = "Oxygen Rain"
+	typepath = /datum/round_event/oxygen_rain
+	requirements = list(0,0,0,0,0,0,0,0,0,0)
+	high_population_requirement = 0
+	weight = 1 //This is a rare occurence.
+	repeatable = FALSE
+	occurances_max = 1
+	map_whitelist = list("LayeniaStation.dmm")

hyperstation/code/datums/weather/oxygen_rain.dm

@@ -0,0 +1,152 @@
+/datum/weather/oxygen_rain
+	name = "oxygen rain"
+	desc = "The weather of Layenia can be quite unpredictable... Given the low temperature outside the station, oxygen condenses into liquid droplets."
+
+	telegraph_duration = 400
+	telegraph_message = "<span class='boldwarning'>Oxygen clouds condense above and around the station...</span>"
+
+	weather_message = "<span class='userdanger'><i>Liquid oxygen pours down around you! It's freezing!</i></span>"
+	weather_overlay = "oxygen_rain"
+	weather_duration_lower = 600
+	weather_duration_upper = 1500
+
+	end_duration = 100
+	end_message = "<span class='boldannounce'>The downpour gradually slows to a light shower before fading away...</span>"
+
+	area_type = /area/layenia/cloudlayer
+	target_trait = ZTRAIT_STATION
+
+	immunity_type = "storm" // temp
+
+	barometer_predictable = TRUE
+
+	var/datum/looping_sound/active_outside_oxygenrain/sound_ao = new(list(), FALSE, TRUE)
+	var/datum/looping_sound/active_inside_oxygenrain/sound_ai = new(list(), FALSE, TRUE)
+	var/datum/looping_sound/weak_outside_oxygenrain/sound_wo = new(list(), FALSE, TRUE)
+	var/datum/looping_sound/weak_inside_oxygenrain/sound_wi = new(list(), FALSE, TRUE)
+
+/datum/weather/oxygen_rain/telegraph()
+	. = ..()
+	var/list/inside_areas = list()
+	var/list/outside_areas = list()
+	var/list/eligible_areas = list()
+	for (var/z in impacted_z_levels)
+		eligible_areas += SSmapping.areas_in_z["[z]"]
+	for(var/i in 1 to eligible_areas.len)
+		var/area/place = eligible_areas[i]
+		if(place.outdoors)
+			outside_areas += place
+		else
+			inside_areas += place
+		CHECK_TICK
+
+	sound_ao.output_atoms = outside_areas
+	sound_ai.output_atoms = inside_areas
+	sound_wo.output_atoms = outside_areas
+	sound_wi.output_atoms = inside_areas
+
+	sound_wo.start()
+	sound_wi.start()
+
+/datum/weather/oxygen_rain/start()
+	. = ..()
+	sound_wo.stop()
+	sound_wi.stop()
+
+	sound_ao.start()
+	sound_ai.start()
+
+/datum/weather/oxygen_rain/wind_down()
+	. = ..()
+	sound_ao.stop()
+	sound_ai.stop()
+
+	sound_wo.start()
+	sound_wi.start()
+
+/datum/weather/oxygen_rain/end()
+	. = ..()
+	sound_wo.stop()
+	sound_wi.stop()
+
+/datum/weather/oxygen_rain/weather_act(mob/living/L)
+	//This is liquid oxygen after all. (-90C)
+	L.adjust_bodytemperature(-rand(5,10))
+
+
+
+
+/datum/looping_sound/active_outside_oxygenrain
+	mid_sounds = list(
+		'sound/weather/oxygenrain/outside/active_mid1.ogg'=1,
+		'sound/weather/oxygenrain/outside/active_mid1.ogg'=1,
+		'sound/weather/oxygenrain/outside/active_mid1.ogg'=1
+		)
+	mid_length = 80
+	start_sound = 'sound/weather/oxygenrain/outside/active_start.ogg'
+	start_length = 130
+	end_sound = 'sound/weather/oxygenrain/outside/active_end.ogg'
+	volume = 60
+
+/datum/looping_sound/active_inside_oxygenrain
+	mid_sounds = list(
+		'sound/weather/oxygenrain/inside/active_mid1.ogg'=1,
+		'sound/weather/oxygenrain/inside/active_mid2.ogg'=1,
+		'sound/weather/oxygenrain/inside/active_mid3.ogg'=1
+		)
+	mid_length = 80
+	start_sound = 'sound/weather/oxygenrain/inside/active_start.ogg'
+	start_length = 130
+	end_sound = 'sound/weather/oxygenrain/inside/active_end.ogg'
+	volume = 20
+
+/datum/looping_sound/weak_outside_oxygenrain
+	mid_sounds = list(
+		'sound/weather/oxygenrain/outside/weak_mid1.ogg'=1,
+		'sound/weather/oxygenrain/outside/weak_mid2.ogg'=1,
+		'sound/weather/oxygenrain/outside/weak_mid3.ogg'=1
+		)
+	mid_length = 80
+	start_sound = 'sound/weather/oxygenrain/outside/weak_start.ogg'
+	start_length = 130
+	end_sound = 'sound/weather/oxygenrain/outside/weak_end.ogg'
+	volume = 50
+
+/datum/looping_sound/weak_inside_oxygenrain
+	mid_sounds = list(
+		'sound/weather/oxygenrain/inside/weak_mid1.ogg'=1,
+		'sound/weather/oxygenrain/inside/weak_mid2.ogg'=1,
+		'sound/weather/oxygenrain/inside/weak_mid3.ogg'=1
+		)
+	mid_length = 80
+	start_sound = 'sound/weather/oxygenrain/inside/weak_start.ogg'
+	start_length = 130
+	end_sound = 'sound/weather/oxygenrain/inside/weak_end.ogg'
+	volume = 30
+
+
+
+
+/datum/round_event_control/oxygen_rain
+	name = "Oxygen Rain"
+	typepath = /datum/round_event/oxygen_rain
+	max_occurrences = 1
+
+/datum/round_event/oxygen_rain
+
+/datum/round_event/oxygen_rain/setup()
+	startWhen = 3
+	endWhen = startWhen + 1
+	announceWhen	= 1
+
+/datum/round_event/oxygen_rain/start()
+	SSweather.run_weather(/datum/weather/oxygen_rain)
+
+/datum/round_event/oxygen_rain/announce()
+	priority_announce("[station_name()]: Oxygen Rain Placeholder",
+	sound = 'sound/misc/notice2.ogg',
+	sender_override = "Kinaris Meteorology Division")
+	for(var/V in GLOB.player_list)
+		var/mob/M = V
+		if((M.client.prefs.toggles & SOUND_MIDI) && is_station_level(M.z))
+			M.playsound_local(M, pick('sound/ambience/aurora_caelus_new.ogg','sound/ambience/aurora_caelus.ogg'), 40, FALSE, pressure_affected = FALSE) //ogg is "The Fire is Gone" by Heaven Pierce Her, used in the videogame ULTRAKILL. All respects and credits to the equivalent artists who worked on it.

tgstation.dme

@@ -3049,6 +3049,7 @@
 #include "hyperstation\code\datums\ruins\lavaland.dm"
 #include "hyperstation\code\datums\traits\good.dm"
 #include "hyperstation\code\datums\traits\neutral.dm"
+#include "hyperstation\code\datums\weather\oxygen_rain.dm"
 #include "hyperstation\code\game\objects\railings.dm"
 #include "hyperstation\code\game\objects\items\cosmetics.dm"
 #include "hyperstation\code\game\objects\items\storage\big_bag.dm"