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