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.
Restore a backup version of yourself.
Reach the top.
See what the others have to say.
Listen to all she has to say.
Don't just peek. Do it.
Do as you're told (for now).
Get everything on your own.
Try, fail, try again, fail again, eventually succeed.
Expose the flaws in the code.
Accept Elohim's wisdom.
Find a Messenger's abode.
Tell the others what you think.
Pick up a star.
Receive guidance from Elohim's messengers.
Communicate with your double.
Laugh at the pointlessness of existence.
Do not allow the serpent to fill you with doubt.
It is never too late to accept Elohim's forgiveness.
Collect all pieces of written information.