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.
Reach the top.
Restore a backup version of yourself.
Get everything on your own.
Expose the flaws in the code.
Try, fail, try again, fail again, eventually succeed.
Find a Messenger's abode.
Tell the others what you think.
Don't just peek. Do it.
Accept Elohim's wisdom.
Pick up a star.
Receive guidance from Elohim's messengers.
Communicate with your double.
Laugh at the pointlessness of existence.
Do as you're told (for now).
See what the others have to say.
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.
Listen to all she has to say.