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
Drink all sodas
Fail at throwing away trash
Clone an object way too many times
Pull enough fire alarms
Put a soda can in the wrong place instead of recycling
Place a soda can in a recycling bin
Break a soda can
Find the nook in Optical
Pull one fire alarm
An apple for a head
Pull all the fire alarms
Empty all fire extinguishers
Find all blueprints
Find all secret chess pieces
Beat the game in under 30 minutes
Beat the game in under an hour
Congratulations on doing something!
Find the hidden trophy
Make the last move
Complete all constellations
Finish the game with developer commentary enabled
Finish all challenges in Challenge Mode
Contribute an item to the Workshop
Import a 3D model into the game
Play someone else's dream
Upload a dream to the workshop