Grand Theft Auto 3 trainer - use the following key combos to enable the corresponding effect:
Tab + 1: Gives All Weapons
Tab + 2: Gives Extra Money
Tab + 3: Gives Full Health
Tab + 4: Higher Wanted Level
Tab + 5: Lower Wanted Level
Tab + 6: Tank
Tab + 7: Destroy All Cars
Tab + 8: Change Costume
Tab + 9: Crazy Pedestrians
Tab + 0: All Pedestrians Attack You
Tab + q: Peds Fight Each Other
Tab + w: Time Advances Quicker
Tab + e: Very Fast Game Clock
Tab + r: 100% Armor
Tab + t: Mad Weather
Tab + y: Clear Weather
Tab + u: Cloudy Weather
Tab + i: Rainy Weather
Tab + o: Toggles Foggy Weather
Tab + p: Invisible Cars
Tab + a: Flying Car
Tab + s: Improves Car Handling
Tab + d: Toggle Gore Mode
Tab + g: (Un)Freeze Mission Timer
Tab + h: Infinite Health
Tab + j: Infinite Ammo
Tab + k: Get rid of police