Full weapons:
Enter "Contest" mode and press R at the bike selection
screen. Enter arsenal (case-sensitive) as a name. A sound will confirm
correct code entry.
Unlimited nitros:
Enter "Contest" mode and press R at the bike selection
screen. Enter nitroid (case-sensitive) as a name. A sound will confirm
correct code entry.
Fish-eye lens:
Enter "Contest" mode and press R at the bike selection
screen. Enter fisheye (case-sensitive) as a name. A sound will confirm
correct code entry.
Boulder race:
Enter "Contest" mode and press R at the bike selection
screen. Enter roller (case-sensitive) as a name. A sound will confirm
correct code entry.
Turbo mode:
Enter "Contest" mode and press R at the bike selection
screen. Enter xtreme (case-sensitive) as a name. A sound will confirm
correct code entry.
Transparent track:
Enter "Contest" mode and press R at the bike selection
screen. Enter ghostly (case-sensitive) as a name. A sound will confirm
correct code entry.
Slippery track:
Enter "Contest" mode and press R at the bike selection
screen. Enter banana (case-sensitive) as a name. A sound will confirm
correct code entry.
Magnification mode:
Enter "Contest" mode and press R at the bike selection
screen. Enter magnify (case-sensitive) as a name. A sound will confirm
correct code entry.
No gravity:
Enter "Contest" mode and press R at the bike selection
screen. Enter antigrav (case-sensitive) as a name. A sound will confirm
correct code entry.
Invisible mode:
Enter "Contest" mode and press R at the bike selection
screen. Enter stealth (case-sensitive) as a name. A sound will confirm
correct code entry.
Disable MIP mapping and textures:
Enter "Contest" mode and press R at the bike selection
screen. Enter uglymode (case-sensitive) as a name. A sound will confirm
correct code entry.
Wireframe mode:
Enter "Contest" mode and press R at the bike selection
screen. Enter wired (case-sensitive) as a name. A sound will confirm
correct code entry.
Quick race finish:
Enter RA50 as a name. A sound will confirm correct code entry.
Begin a race and quit during game play. The race will complete with a finishing
position the same as whatever place your bike was when the quit option was
selected.
Extreme Team racers:
Enter XGTEAM as a name. A sound will confirm correct code entry.
Return to the name entry screen and enter the first name of one of the game's
developers, from the credits. Some choices are Andy, Ash, Craig, Darren,
Giles, Greg, Joe, John, Jon, Justin, Lloyd, Sadie, Shawn, Simon, Steve,
and Omri. The faces of the developers will now appear on the bikes.
Fergus mode:
Enter FERGUS as a name and begin shoot 'em up mode. Fergus' face
will now appear on the drones.
Roach motorcycle:
Complete the Meltdown circuit at the intermediate difficulty level.
Alternatively, enter 51GG95 as a password for the Roach and all tracks.
Neon motorcyle:
Complete the Meltdown circuit at the expert difficulty level. Alternatively,
enter 61GGB5 as a password for the Roach, Neon, and all tracks.
Bonus track:
Complete the Meltdown circuit at the extreme difficulty level with a
bike other than the Roach or Neon and finish first on all tracks. A small
bonus track will be available in single and multiplayer modes. Alternatively,
enter 81GGD5 as a password for the Roach, Neon, and all tracks including
the bonus track.
Bike inspection:
Enter the bike selection screen. Press C-Left or C-Right
to speed up, slow down, and stop the slow rotation of the bikes. Press C-Up
or C-Down to tip the bikes to view the tops and bottoms.
Cheat codes from Bill's Cheat Pages
http://www.angelfire.com/ca2/billscheats/