Here is the full list of all 13 Subnautica: Below Zero achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Use the antidote.
Leave 4546B.
Construct an alien vessel.
Repair the bridge.
Construct a cold suit.
Ride a Snowfox.
Construct a spy pengling.
Disable Alterra communications.
Find Marguerit's home.
Construct a Seatruck
Encounter a sapient alien lifeform.
Locate your Drop Pod.
Install a jukebox.