Here is the full list of all 11 Prison Chainball Massacre achievements.
Finish the tutorial.
You disabled blood, you pansy.
Become black.
Change the color of your outfit.
Unlock all chainballs.
Unlock all bonuses.
Reach 10 kills with a basketball while being black.
Reach Inmate #100.
Reach x10 combo.
Have 10 golden enemies at screen at once.
Reach wave 10