Misplace- Start a Contest and enter your name as MISPLACE at the name entry screen (not the password screen). You can access name entry by pressing R at the bike selection screen.
Get Sick- Enter your name as SPIRAL and the screen will constatly spiral while you race. Enter again to deactivate
Magnify Mode- Enter your name as FLICK and the screen will be blurred while you race. Enter again to deactivate.
Dual Mode and Spectre Bike- Enter HSFDCCV611FV as a password.
Mirror ModeM- Enter HS3B9BQ9DGPL as a password.
No Panels- Enter your name as NOPANELS and the screen will be blurred while you race. Enter again to deactivate
Satellite View- Enter your name as SPYEYE at the name entry screen (NOT the password screen) which can be reached from the bike selection screen in Contest mode, and you will be able to play XG2 in overhead view.
Get the Venom Bike- If you want to race as Hotra Toxic with her super-fast Venom Bike, come in first on the Atomic Contest -- or, if you're too lazy, enter the following password: 68QCMH3H9HT.
Get the Wasp Superbike- Get the second superbike? Finish the Contest Mode on Critical Mass difficulty, and you'll be able to drive the Wasp. You can also enter the following password: 55Hz1MH3H9H1.
More Multi-Player Levels- Enable the Venom Bike and Wasp Superbike codes above then put in the following password: N31GG76CG9DZ.
Get the Spectre Superbike- Finish the Extreme Contest-Meltdown with a overall of 1st place. Or put in the following password: 3GP8ZKW76ZMW.
All Tracks- Enter 8KLSZKW76ZM7 as a password.
More Codes- Enter "Extreme Contest", then at the bike selection screen press R, then enter a code below:
Code/Effect
ROLLER/ Boulder Race
2064/ Jet Bike
XXX/ Turbo Mode
XCHARGE/ Infinite Weapons and shields
MISTAKE/ Infinite Weapons
NITROID/ Infinite Nitros
PIXIE/ Pixilated Graphics
LINEAR/ Wireframe Mode
JUGGLE/ ??
SPYEYE/ Overhead View
NEUTRON/ TRON Mode
SPIRAL/ Makes Screen Spiral
FLICK/ Magnification Mode
RA50/ Level Skip Use 'go' option at placing screen to advance