All Characters in Multiplayer Mode
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."
Submitted by D.J. Leahy and Matt Audette
For all weapons, enter the password FATKNACKER.
Big Head Mode
For big head mode enter the password MEGANOGGIN at the Cheat menu.
To access these characters in multiplayer mode, enter one of the passwords below.
veggieheaven = Skinny
cheatingisbad = Mr. Mackey
elvislives = Bar Brady
outrage = Big Gay Al
hawking = Ned
slapupmeal = Starvin Marvin
phaert = Phillip
raft = Terrance
dorothysfriend = Mr. Garrison
lovemachine = Chef
checkataco = Wendy
fishnchips = Pip
kickme = Ike
allwoman = Mrs. Cartman
goodscience = Mephisto
staringfrog = Jimbo
majestic = Alien
By holding C-up and either C-left or C-right, and running at an angle you can move at an increased speed.
For god mode enter the password ASSMAN.
To choose your starting level enter the password THEEARTHMOVED. After activating this code, start a new game and pause it. You may now enter the Level Select menu.
Load Your Earned Characters
This allows you to load all of the characters you earned without entering all of the passwords. First, go to Story Mode, and choose load a game. Load the game, then once it starts quit it. Now all of your characters are available in multiplayer.
To unlock all codes at once, enter the code BOBBYBIRD at the Cheats menu.
Pen and Ink Mode
For Turok's famous "pen and ink" mode, enter the password PLANEARIUM.
For unlimited ammo, enter the password FATTERKNACKER.