Here is the full list of all 13 Shadow Burglar achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Awarded for finishing the second level.
Awarded for finishing a level undetected.
Awarded for finding the camera collectible.
Awarded for finding the top hat collectible.
Awarded for finding the glasses collectible.
Awarded for finishing the first level.
Awarded for finishing a level without taking down a guard.
Awarded by learning the art of distraction.
Awarded by learning the art of the shadows.
Awarded for finding the pocket watch collectible.
Awarded for finding all collectibles.
Awarded for taking down 10 guards in a game session.
Awarded for unlocking the secret mode.