Earn the 'Legend' rank by becoming the top ranked stuntman. Then, select 'Extra' at the options menu to access all cheats.
Easy two wheel
To easily perform a two wheel stunt, such as in 'Clowning Around', just line up the driver side wheels and take a little speed to master the stunt. To do it for a long time just keep going left and right (like balancing).
Graphics modes
Enter GFXMODES as a code. Press L3 to access the 'Dream', 'RC Car', 'Puke Cam', 'All Combined', and 'Normal' graphics mode options.
Ice Wheels
At the main menu, go to extras and then go to cheats, then press sqaure and then enter the following code: IceAge.
MVX Spartan
Enter FASTRIDE as a code.
Nitro Addiction
At the main menu, go to extras and then go to cheats, then press sqaure and then enter the following code: TheDuke.
Slow-Mo Cool, Thrill Cam
At the main menu, go to extras and then go to cheats, then press sqaure and then enter the following code: Hollywood.
Touchable
At the main menu, go to extras and then go to cheats, then press sqaure and then enter the following code: Imtarex.
Unlock all
At the main menu, go to extras and then go to cheats, then press sqaure and then enter the following code: Kungfoopete.
Unlock Freaky Fast
At the main menu, go to extras and then go to cheats, then press sqaure and then enter the following code: Slingpoo.
Vision Switcher
At the main menu, go to extras and then go to cheats, then press sqaure and then enter the following code: Wearefrozen.