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 by learning the art of the shadows.
Awarded by learning the art of distraction.
Awarded for finding the glasses collectible.
Awarded for finding the pocket watch collectible.
Awarded for finding the top hat collectible.
Awarded for finding the camera collectible.
Awarded for finding all collectibles.
Awarded for finishing the first level.
Awarded for finishing the second level.
Awarded for finishing a level without taking down a guard.
Awarded for finishing a level undetected.
Awarded for taking down 10 guards in a game session.
Awarded for unlocking the secret mode.