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