Use the following codes while playing the game:
MMGHOST: no collision mode.
MMLEVITATE: no clipping mode.
MMTRIGGERHAPPY: refill ammo.
MMFAITHNOMORE: god mode.
MMFERRARI: grant new buggy choice.
MMACTIVATE: complete all mission objectives.
MMJUSTICE: destroy all enemies.
MMPARANOID: grant a buggy booster pack.