Added proper gas turfs for atmos, remapped atmos turfs.

code/__defines/atmos.dm

@@ -8,6 +8,8 @@
 #define MOLES_PHORON_VISIBLE 0.7 // Moles in a standard cell after which phoron is visible.
 #define MOLES_O2STANDARD     (MOLES_CELLSTANDARD * O2STANDARD) // O2 standard value (21%)
 #define MOLES_N2STANDARD     (MOLES_CELLSTANDARD * N2STANDARD) // N2 standard value (79%)
+#define MOLES_O2ATMOS (MOLES_O2STANDARD*50)
+#define MOLES_N2ATMOS (MOLES_N2STANDARD*50)
 
 // These are for when a mob breathes poisonous air.
 #define MIN_TOXIN_DAMAGE 1

code/game/turfs/flooring/flooring_premade.dm

@@ -45,6 +45,42 @@
 	icon_state = "reinforced"
 	initial_flooring = /decl/flooring/reinforced
 
+/turf/simulated/floor/reinforced/airless
+	oxygen = 0
+	nitrogen = 0
+
+/turf/simulated/floor/reinforced/airmix
+	oxygen = MOLES_O2ATMOS
+	nitrogen = MOLES_N2ATMOS
+
+/turf/simulated/floor/reinforced/nitrogen
+	oxygen = 0
+	nitrogen = MOLES_O2ATMOS + MOLES_N2ATMOS
+
+/turf/simulated/floor/reinforced/oxygen
+	oxygen = MOLES_O2ATMOS + MOLES_N2ATMOS
+	nitrogen = 0
+
+/turf/simulated/floor/reinforced/phoron
+	oxygen = 0
+	nitrogen = 0
+	phoron = MOLES_O2ATMOS + MOLES_N2ATMOS
+
+/turf/simulated/floor/reinforced/carbon_dioxide
+	oxygen = 0
+	nitrogen = 0
+	carbon_dioxide = MOLES_O2ATMOS + MOLES_N2ATMOS
+
+/turf/simulated/floor/reinforced/n20
+	oxygen = 0
+	nitrogen = 0
+
+/turf/simulated/floor/reinforced/n20/New()
+	..()
+	sleep(-1)
+	if(!air) make_air()
+	air.adjust_gas("sleeping_agent", MOLES_O2ATMOS + MOLES_N2ATMOS)
+
 /turf/simulated/floor/cult
 	name = "engraved floor"
 	icon = 'icons/turf/flooring/cult.dmi'