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.
Find all audio recordings.
You have learned the ways of the SNéK.
Solve the wire puzzle.
Ahh! Scary noise! No!
Healed and ready to execute some puzzles.
Score 600 or higher in a certain challenge.
Why did you do that?