Full Health and Armor
During game play, enter "R1," "R2," "L1," "X," "Left," "Down," "Right," "Up," "Left," "Down," "Right," "Up." This will give you $250,000, maximum health and maximum armor. It will also fully restore the vehicle you are in at the time.
Infinite Health
While in game play, enter "Down," "X," "Right," "Left," "Right," "R1," "Right," "Down," "Up," "Triangle." This will give you infinite health, although you can still be killed from explosions, drowning or falling from a height.
Jetpack
To get a jetpack, enter "Left," "Right," "L1," "L2," "R1," "R2," "Up," "Down," "Left," "Right."
Lower Wanted Level
During game play, enter "R1," "R1," Circle, "R2," "Up," "Down," "Up," "Down," "Up," "Down" to reduce your wanted level and subsequently reduce the number of law enforcement units in pursuit.
Increase Car Speed
To increase the speed of your vehicle during game play, enter "Up," "L1," "R1," "Up," "Right," "Up," "X," "L2," "X," "L1."