Here is the full list of all 27 The Entropy Centre achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Leave The Entropy Museum with all walls repaired
Find Astra a hat
Launch an entropy bot into another one
Visit all exhibits in The Entropy Museum
Pet 'E'
Complete Act 6
Complete Act 5
Complete Act 4
Complete Act 3
Complete Act 2
Complete Act 1
Rewind 3 items in the play area
Complete Act 7
Complete Act 8
Complete Act 9
Complete Act 10
Complete Act 11
Complete Act 12
Complete Act 13
Complete Act 14
Complete Act 15
Complete Act 16
Complete the game's campaign
Destroy 3 bots with one explosive cube
Relax at the beach with a drink
Read all terminal messages
Find Astra