Unlock everything:
Press Left(2), Right, Square, Up, L2(2), R1 at the main menu.
All cars and tracks:
Press Right(2), Left, Square, Up, L2(2), R1 at the main menu.
Bonus cars:
Select the San Francisco Drag Race and use the Dodge Concept Viper to set a new time record. Then, enter SOUNDMAX as a name at the high score screen. The Jaguar XK-R "SoundMAX SPX", Jaguar XK-R "Analog Devices", and the Aston Martin DB7 "SoundMAX SPX" will be unlocked.
G4 TV car:
Select the San Francisco Drag Race and set a new time record. Then, enter PLWCBF as a name at the high score screen. The G4 TV Viper will now be unlocked.
Alternate replay views:
Press Select during replays to change the camera effects.
Ending bonuses:
Win all races in story mode to unlock the San Francisco tracks in single race and cop chase modes, as well as the Chevrolet Corvette L-88, Jaguar XK-R, Lotus Espirit V8, and Lotus Elise.