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.
Internalise the voice of doubt.
Strike a deal.
Do not allow the serpent to fill you with doubt.
Solve every mystery in every land, that you might aid those who walk in your footsteps.
Laugh at the pointlessness of existence.
Communicate with your double.
Collect all pieces of written information.
Listen to all she has to say.
Expose the flaws in the code.
See what the others have to say.
Bring the end of your generations.
Restore a backup version of yourself.
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.
A little curiosity never killed the cat.
It's not for everyone!
Do as you're told (for now).
Get everything on your own.
Try, fail, try again, fail again, eventually succeed.
Stand on your own two shoulders.
Find a Messenger's abode.
That's what axes are for!
Enter the Land of Faith.
Successfully engage in co-op mode with yourself.
Use the power of air to your advantage.
Tell the others what you think.
Run the sand through your robot hands.
Search for other lands.
Accept Elohim's wisdom.
...but let's be honest, it works the same.
Use the connectors to win a prize!
Pick up a star.
Enter Elohim's temple.
Pass the initial checks.
Rescue Admin from his prison cell.
Initiate the ascension process.
Free Garrett.
Get your user profile.