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