Invincibility
Enter ASSMAN as a code

All Cheats Enabled
Enter BOBBYBIRD as a code

Level Select
Enter THEEARTHMOVED as a code

All Weapons
Enter FATKNACKER as a code

Infinite Ammo
Enter FATTERKNACKER as a code

All characters in Multiplayer Mode
Enter OMGTKKYB as a code

Unlock Terrance
Enter RAFT as a code

Unlock Phillip
Enter PHAERT as a code

Unlock Starvin Marvin
Enter SLAPUPMEAL as a code

Unlock Mr. Garrison
Enter DOROTHYSFRIEND as a code

Unlock Mr. Mackey
Enter CHEATINGISBAD as a code

Unlock Chef
Enter LOVEMACHINEas a code

Unlock Wendy
Enter CHECKATACO as a code

Unlock Pip
Enter FISHNCHIPS as a code

Unlock Ike
Enter KICKME as a code

Unlock Mrs. Cartman
Enter ALLWOMAN as a code

Unlock Mephisto
Enter GOODSCIENCE as a code

Unlock Jimbo
Enter STARINGFROG as a code

Unlock Ned
Enter HAWKING as a code

Unlock Big Gay
Enter OUTRAGE as a code

Unlock Barbrady
Enter ELVISLIVES as a code

Unlock Alien
Enter MAJESTICas a code

Unlock Skinny
Enter VEGGIEHEAVEN as a code

View Credits
Enter SCREWYOUGUYS as a code

Pen & Ink Mode
Enter PLANEARIUMas a code

Big Head Mode
Enter MEGANOGGIN as a code

Infinite guns (PAL version??)

On front screen go to password and enter:CHESSYPOOFSROCK