While in the game, press ENTER and type one of the following codes. Then press ENTER again to activate the cheat function.

MPTRAITOR: Traitor Mode
MPBACK2LIFE: Zombie Mode
MPMEEPMEEP: Turbo Mode
MPLEMONBUTTERCREMEZ: High On Sweetz Level (When Current Level Completed)
MPRIORIO: Trouble In The Tropics Level (When Current Level Completed)