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