Entry location: Go to the options menu and select "Game Status". Highlight any driver and press Circle (passcode), then enter "WMNNWLHTSCUCLH" as a passcode. This will unlock all hidden characters, levels, and 'Y' the Alien.
Enter "I_WILL_NOT_DIE" as a passcode.
Enter "GO_SIGHTSEEING" as a passcode.
Enter "REDUCE_GRAVITY" as a passcode.
View FMV sequences
Enter "SEE_ALL_MOVIES" as a passcode.
Enter "HARDEST_OF_ALL" as a passcode.
Same vehicles in two player mode
Enter "SAME_CHARACTER" as a passcode. This will make it so both players can choose the same vehicles in two player mode.
Monster truck tires
Enter "MONSTER_WHEELS" as a passcode. This will make your tires big.
More powerful missiles
Enter "DEADLY_MISSILE" as a passcode. This will make your homing missiles do more damage.
Wait until a level completes loading, then switch the game CD with an audio CD of your choice. Pause the game to select a new audio track. A prompt for the game CD will appear after the level is exited.
Enter the following actions while playing a game to active the special attack of the indicated weapon. Note: The required weapon must be in the inventory, but does not need to be currently active.
Interceptor Missiles (Halo Decoy), uses 2 missiles
Press Up(2), Down then shoot the machine gun to cause your opponent's homing missiles or special attacks to follow your missiles instead of your vehicle.
Interceptor Missiles (Turbo), uses 2 missiles
Press Up(3) then shoot the machine gun to speed up for a few seconds.
Bull's Eye Rockets (Stampede), uses 1-5 rockets
Press Up, Down, Up then shoot the machine gun to rapidly fire multiple non-homing rockets.
Bull's Eye Rockets (Boost Rocket), uses 2 rockets
Press Up, Down, Up, then shoot the machine gun. If an opponent is hit, he or she is taken for a sky ride.
Sky Hammer Mortar (Turtle Turnover), uses 2 shells
Press Down(3) then shoot the machine gun to flip your opponents' vehicles.
Sky Hammer Mortar (Crater Maker), uses 5 shells
Press Down(2), Up, then shoot the machine gun to drop a mega bomb that will leave a crater.
Bruiser Cannon (Cow Puncher), uses 2 shells
Press Down, Up, Down then shoot the machine gun to punch opponent vehicles back.
Bruiser Cannon (Scatter Blast), uses six shells
Press Down, Up(2), then shoot the machine gun to shoot six cannon shells simultaneously.
Roadkill Mines (Cactus Patch), uses 1-6 mines
Press Left, Right, Up then shoot the machine gun to rapidly deploy a group of mines.
Roadkill Mines (Magnetic Mine), uses two mines
Press Left, Right, Down, then shoot the machine gun to drop a mine that will attract nearby cars.
Directional Gun Burst
Uses five shells press down(2), up(2), then fire machine guns to shoot five shells at once
Uses 2 homing missles Press up(3) then fire machine guns to set off two missiles still in the holder for extra speed