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.
Steal 6 big toy boxes
Steal santa sleigh car
Break 10 dishes
Steal 10 toasters
Steal the skid loader
Steal 5 construction yellow boxes
Steal the forklift
Steal 5 consoles
Steal and sell 8 candy bags on BlackBay
Break 10 toilets
Steal and sell 7 pumpkins on BlackBay
Steal and sell 4 creepy dolls on BlackBay
Break a window with a brick
Break 10 windows
Steal 5 cars
Steal Kubra GTS
Steal items worth 100000
Finish story
Steal Aisan Cougar
Steal Vulcan Spectre
Steal items worth 50000
Steal Bolthorn Family MkV
Disable 10 control panels
Steal 10 paintings
Steal Bolthorn 86 Classic
Steal items worth 20000
Finish 10 thefts without beeing seen
Steal 5 TVs
Steal items worth 5000
Find 5 Faberge Egg replicas in Richie R.
Sell all presents on BlackBay
Buy a cloaking device on ng+
Sell 5 VHS on BlackBay