EXPOSURE TO OXYGEN-RICH ATMOSPHERE
If someone is outside of enviro-controlled buildings or vehicles on the planet's surface without a functioning filter mask, they will experience oxygen toxicity and die in a few minutes.
After 1D rounds of exposure (with no game effects), the person begins having breathing trouble; each round thereafter, throw END or less on 2D or suffer END loss equal to the amount by which the roll was missed. If the individual has managed to survive for 20 rounds, subsequent END throws are at DM +2.
During any round on which the END roll is missed, the person undergoes convulsions and can take no actions.
At half END, the victim is considered Weakened, making him or her unable to run, suffering the usual penalty in physical combat, and able to take only 1 action per round. At 0 END, the person falls unconscious and will lose 1 point from either STR or DEX each round thereafter until death results.
EXPOSED TO SUB-FREEZING TEMPERATURE
If someone is outside of enviro-controlled buildings or vehicles on the planet's surface, throw END or less each hour with the following DMs:
+1 at night
-1 at day
+0 at dawn or dusk
+2 if wearing no cold weather clothing
+0 with makeshift cold weather clothing
-2 if wearing Dostoevski cold weather clothing
+2 if wet or windy
+4 if immersed in water
-1 if walking or moderate activity
-3 if running, lifting, or heavy activity
Each failure results in 1D END loss (stun damage). At 0 END, the victim is unconscious, but rolls continue each hour, with further damage going to STR or DEX.
EXPOSED TO PRESSURE AT OCEAN BOTTOM
If someone is exposed to the full pressure of the ocean depths outside the Station, they take 1D damage to a random characteristic each round, no save.