You defeated Princess Kenny and recovered the Stick of Truth.

You defeated 20 enemies using Cartman's Ass.

You made friends with half of South Park.

You befriended your father.

You defeated the Grand Wizard Cartman in battle.

You collected 15 Chinpokomon.

You sold 300 junk items.

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

You shat your pants during a boss battle.

Over the course of the game, you've blocked 100 attacks.

You successfully blocked every enemy attack in a single (non-tutorial) battle.

Kill 75 enemies with the rifle.

Loot 200 enemies.