Full list of all 33 Thief Simulator achievements. It takes around 20-25 hours to unlock all of the achievements in the base game on Windows.
The base game contains 29 achievements, and there are 4 DLC packs containing 4 achievements.
Finish story
Finish 10 thefts without beeing seen
Disable 10 control panels
Break a window with a brick
Steal items worth 50000
Break 10 windows
Steal Bolthorn Family MkV
Steal Vulcan Spectre
Break 10 dishes
Steal Bolthorn 86 Classic
Steal items worth 20000
Steal items worth 5000
Steal 5 cars
Steal 10 paintings
Steal Aisan Cougar
Steal Kubra GTS
Steal items worth 100000
Steal 5 consoles
Break 10 toilets
Steal 5 TVs
Steal 10 toasters
Steal 5 construction yellow boxes
Steal the forklift
Steal the skid loader
Steal and sell 8 candy bags on BlackBay
Steal and sell 4 creepy dolls on BlackBay
Steal and sell 7 pumpkins on BlackBay
Steal santa sleigh car
Steal 6 big toy boxes
Find 5 Faberge Egg replicas in Richie R.
Sell all presents on BlackBay
Buy a cloaking device on ng+
Sell 5 VHS on BlackBay