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