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