Survive the horde on the roof

Clear out the cinema

Kill special enemies: Grenadier, Thug, Wrestler, Infected, Suicider, Screamer, Butcher, Floater.

Completed the mission "The Man Who Would Be Jack"

You collected all of the Chinpokomon.

You defeated Princess Kenny and recovered the Stick of Truth.

You defeated 20 enemies using Cartman's Ass.

Completed the mission "The Once and Future Slab"

You've spent $500.

You've farted on every buddy in the game.

You have collected half of the available costume sets.

You befriended your father.

You've unlocked all of the upgrades for a New Kid ability.