During play, press Esc. Now type in the following codes, then press Esc again

to activate.

CUDDLE       God mode for current car
HUGS         God mode for all friendly cars
KISS         Destroy targeted car
LOVE         Destroy all enemies on radar
IMLAME       Win mission
CARESS       Full ammo
SYRUP        Freeze all CPU players
NUKEME       Self-Destruct

Thanks to Revolution readers radish, Vipa, David Riendl, and GPezza!