All cheats enabled:
Enter BOBBYBIRD as a code.

Level select:
Enter THEEARTHMOVED as a code.

Invincibility:
Enter ASSMAN as a code.

All weapons:
Enter FATKNACKER as a code.

Unlimited ammunition:
Enter FATTERKNACKER as a code.

All characters in multi-player mode:
Enter OMGTKKYB as a code.

Officer Barbrady:
Enter ELVISLIVES as a code.

Mr. Mackey:
Enter CHEATINGISBAD as a code.

Phillip:
Enter PHAERT as a code.

Terrance:
Enter RAFT as a code.

Mr. Garrison:
Enter DOROTHYSFRIEND as a code.

Chef:
Enter LOVEMACHINE as a code.

Wendy:
Enter CHECKATACO as a code.

Pip:
Enter FISHNCHIPS as a code.

Ike:
Enter KICKME as a code.


Mrs. Cartman:
Enter ALLWOMAN as a code.

Mephisto:
Enter GOODSCIENCE as a code.

Jimbo:
Enter STARINGFROG as a code.

Ned:
Enter HAWKING as a code.

Big Gay Al:
Enter OUTRAGE as a code.


Alien:
Enter MAJESTIC as a code.


Starvin Marvin unlocked:
Enter SLAPUPMEAL as a code.

Skinny mode:
Enter VEGGIEHEAVEN as a code.

Big head mode:
Enter MEGANOGGIN as a code.

Pen and ink mode:
Enter PLANEARIUM as a code.


View credits:
Enter SCREWYOUGUYS as a code.