Full list of all 40 The Talos Principle achievements. It takes around 25-30 hours to unlock all of the achievements in the base game on Windows.
The base game contains 36 achievements, and there is 1 DLC pack containing 4 achievements.
Listen to all she has to say.
Collect all pieces of written information.
It is never too late to accept Elohim's forgiveness.
Reach the top.
Don't just peek. Do it.
Receive guidance from Elohim's messengers.
Expose the flaws in the code.
Restore a backup version of yourself.
Accept Elohim's wisdom.
Laugh at the pointlessness of existence.
Find a Messenger's abode.
See what the others have to say.
Tell the others what you think.
Try, fail, try again, fail again, eventually succeed.
Pick up a star.
Communicate with your double.
Do as you're told (for now).
Get everything on your own.
Do not allow the serpent to fill you with doubt.