Full list of all 27 Superliminal achievements. It takes around 8-10 hours to unlock all of the achievements in the base game on Windows.
The base game contains 21 achievements, and there is 1 DLC pack containing 6 achievements.
Beat the game in under 30 minutes
Beat the game in under an hour
Find all blueprints
Find all secret chess pieces
Make the last move
Find the hidden trophy
Complete all constellations
Congratulations on doing something!
Pull all the fire alarms
Empty all fire extinguishers
Beat the game
An apple for a head
Clone an object way too many times
Place a soda can in a recycling bin
Drink all sodas
Find the nook in Optical
Pull enough fire alarms
Fail at throwing away trash
Put a soda can in the wrong place instead of recycling
Pull one fire alarm
Break a soda can
Upload a dream to the workshop
Play someone else's dream
Contribute an item to the Workshop
Import a 3D model into the game
Finish all challenges in Challenge Mode
Finish the game with developer commentary enabled