Here is the full list of all 12 COLD DEPTH achievements.
Crash in a vessel
Get 10 points on the basketball scoreboard
Replace cores in reactors with new ones
Die by elevator.
Cold to death.
Die from gas.
Connect the toy core to the reactor.
Rest 3 times
Upgrade your body to the upgrade station.
Disintegrate the 10 items in the squat wastebasket.
Use excrement.
Use the toilet 10 times.