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