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