To speed up your ride, go to the pause menu and enter this code: R3, L3, L3, R3, LEFT, CIRCLE, LEFT.
To increase Time Warp, pause the game and push these buttons: R1, L1, L2, R2, RIGHT, RIGHT, RIGHT.
To become invisible, pause the game, then press R1, L1, L1, R2, L1, L1, L2. A sound will confirm correct entry. To undo the code, simply reenter it.
To lessen the amount of Time Warp, enter this code at the pause menu: R2, L2, L1, R1, LEFT, LEFT, LEFT.
To make your ride a little lighter, pause the game and press these buttons: L1, R1, R1, L2, R2, R2. A sound will confirm correct entry. To undo the code, simply reenter it.
To make your ride transparent, go to the pause menu and press the following buttons: LEFT, UP, RIGHT, DOWN, RIGHT, UP, LEFT, L2.
Pause the game and hit: R3,R3,R3,R1,R1,R2,R2
To operate in a zero gravity environment, go to the pause menu and enter the following code: R1, R2, R1, R2, UP, UP, UP.
Beat the missions listed to get the corresponding prize: Super Buggy: Available at beginning of the game
Super Buggy Boost: Mission 3
D-5 Hondo: Training Mission 3
D-5 Hondo Oil Slick: Mission 8
Baja Truck: Mission 4
Baja Truck Bombs: Mission 7
ATV Monster: Mission 10
ATV Monster's Speed Burst: Mission 14
Du Monde: Mission 13
Du Monde Oil Slick: Mission 21
Sahara Special: Mission 17
Sahara Smoke Screen: Mission 18
Grenadier: Mission 24
Grenadier Bombs: Mission 25
Kavostov Halftrack: Mission 27
Kavostov Halftrack's Smoke Screen: Mission 29
Vietnam Map: Mission 9
Georgian Russia Winter Map: Mission 22