South Park

Enter MAJESTIC as a code.

Enter OMGTKKYB as a code.

To enable all characters in multiplayer mode, enter the password OMGTKKYB. That, as any South Park fan will know, stands for "Oh My God, They Killed Kenny! You Bastards."

Enter BOBBYBIRD as a code. Note: Enter ZBOBBYBIRD in the EU/PAL version of the game.

Enter FATKNACKER as a code.