Here is the full list of all 20 Predicate achievements.
Beat the tutorial.
Crush two enemies within two seconds.
As Ball recover from minimum health.
As Snake beat a boss without taking damage.
Use a custom palette.
Beat a boss with the white palette.
Set the polycount to minimum.
As Ball beat a stage without movement inputs.
Beat the tutorial in 6 minutes.
As snake beat a bigger Snake.
Beat The Wall with attacks turned off.
Beat two bosses with attacks turned off.
As Ball beat The Eye Swarm.
Beat the game.
Beat boss rush mode.
As Snake beat all bosses without losing 1 health.
As Ball beat all bosses on hard.
As Snake beat all bosses with attacks turned off.
Beat the game in 1 hour.
Beat the game without upgrades.