Here is the full list of all 10 The Looker achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Solve a puzzle in real life.
Complete the environmental puzzle.
Solved all pages of the Great Book.
Why did you do that?
Score 600 or higher in a certain challenge.
You have learned the ways of the SNéK.
Find all audio recordings.
Ahh! Scary noise! No!
Solve the wire puzzle.
Healed and ready to execute some puzzles.