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.
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Find a Messenger's abode.
That's what axes are for!
Stand on your own two shoulders.
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.
...but let's be honest, it works the same.
Use the connectors to win a prize!
A little curiosity never killed the cat.
Search for other lands.
Pick up a star.
Enter Elohim's temple.
Pass the initial checks.
Try, fail, try again, fail again, eventually succeed.
Accept Elohim's wisdom.
Receive guidance from Elohim's messengers.
Communicate with your double.
Don't just peek. Do it.
Laugh at the pointlessness of existence.
Strike a deal.
Do as you're told (for now).
Get everything on your own.
Expose the flaws in the code.
Do not allow the serpent to fill you with doubt.
It's not for everyone!
Restore a backup version of yourself.
Reach the top.
It is never too late to accept Elohim's forgiveness.
Bring the end of your generations.
Internalise the voice of doubt.
Collect all pieces of written information.
Listen to all she has to say.
Solve every mystery in every land, that you might aid those who walk in your footsteps.
Get your user profile.
Free Garrett.
Initiate the ascension process.
Rescue Admin from his prison cell.