Pause your game, then select "Cheats" from the menu and enter any of the codes below.
Password Effect
DOZER .. Bulldozer
NOBALLS  Decrease Gang Heat
FLYSTRT  Decreases Cop Heat
FPATCH . Fill Balls Meter
GRAYSH . Gray Suit Tony With Sunglasses
DONUT .. Increase Cop Heat
GOBALLS  Increase Gang Heat
AMMO ... Max Ammo
MEDIK .. Refill Health
RAINY .. Toggle Rain