Car Speed Cheat
All cheats need to be entered during gameplay. A "Cheat Enabled" message pops up on the screen when the is entered successfully. The car speed cheat is enabled by entering "Up," "L1," "R1," "Up," "Right," "Up," "X," "L2," "X" and "L1."
Spawn Fast Cars
The game can also be made to more frequently spawn fast cars by entering "Right," "R1," "Up," "L2," "L2," "Left," "R1," "L1," "R1" and "R1." Faster cars makes the speed boost higher.
Car Suspension and Handling
With increased speed cars can often become unstable and difficult to control. To counter this enter "Square," "Square," "R2," "Left," "Up," "Square," "R2," "X," "X" and "X" for improved suspension and "Triangle," "R1," "R1," "Left," "R1," "L1," "R2" and "L1" for perfect handling.
Flying Cars
As fast as a car gets its still slowed down by the twists and turns of the road. To get from one place to another faster than normal enter "Square," "Down," "L2," "Up," "L1," "Circle," "Up," "X" and "Left" to make your car capable of flight.
Tank
Although normally slow the tank is "Grand Theft Auto's" ultimate in chaos and explosions. Press "L1," "L2," "L2," "Up," "Down," "Down," "Up," "R1," "R2" and "R2" to turn a car into a tank. Turning the gun turret around and firing backward greatly increases the tank's speed. Also, combined with the previous code, the tank can fly.