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