Here is the full list of all 10 SOMA achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
They’re not us!
Reached the Omega Space Gun
Met the last person left alive
Changed body at Omicron
Escaped Theta
Failed at acquiring the DUNBAT
Crash-landed on peak Delta
Discovered Theta
Discovered Lambda
Talked to Catherine Chun