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
Make the last move
Find all secret chess pieces
Beat the game in under an hour
Find the hidden trophy
Find all blueprints
Complete all constellations
Congratulations on doing something!
Empty all fire extinguishers
Pull all the fire alarms
Clone an object way too many times
An apple for a head
Break a soda can
Beat the game
Drink all sodas
Place a soda can in a recycling bin
Pull enough fire alarms
Find the nook in Optical
Fail at throwing away trash
Put a soda can in the wrong place instead of recycling
Pull one fire alarm
Upload a dream to the workshop
Contribute an item to the Workshop
Import a 3D model into the game
Play someone else's dream
Finish the game with developer commentary enabled
Finish all challenges in Challenge Mode