Vigilante 8

Enter the password GIMME_DA_ALIEN.

Enter the password: JTBT7CFD1LRMGW to unlock all Characters, stages, and cars.

Successfully complete 'Y' the Alien's quest and you will be able to play in Super Dreamland 64, a colorful fantasy world.

Cow Puncher: Down-Up-Down-Fire Machine Gun
Cost: 2 Shells

To let multiple players use the same car, enter the password MIX_MATCH_CARS.

The following are the secret moves labeled as classified (and thus undocumented) in the manual:
Interceptor Missiles Halo Decoy: Up-Up-Down-Fire Machine Gun Cost: 2 Missiles
Bull's Eye Rockets Stampede: Up-Down-Up-Fire Machine Gun Cost: 5 Rockets
Sky Hammer Mortar Turtle Turnover: Down-Down-Down-Fire Machine Gun Cost: 2 Shells
Bruiser Cannon Cow Puncher: Down-Up-Down-Fire Machine Gun Cost: 2 Shells
Roadkill Mines Cactus Patch: Left-Right-Up-Fire Machine Gun Cost: 2 to 6 Mines

The following are the secret moves labeled as classified (and thus undocumented) in the manual.

Enter the code on the passcode screen:

Some of them are not revealed in the instruction manual, here are the codes to enter. It is a set of directional codes that you enter with the stick or the pad (I prefer the stick)

Afterburner
Use this to give you a boost of speed. You must have Interceptor missiles to use this. It takes 2 missiles everytime you use it. Enter Up,Up,Up, then fire the Machine Gun. (Z at default)

Halo
Use this as a decoy to ward off guided shots, like other Interceptor Missiles. This also takes 2 missiles to use, and you enter Up,Up,Down then fire the machine gun. (Z)

Stampede
This uses Bullseye rockets, this move fires 5 of them in quick succession, Enter Up, Down, Up, then fire the machine gun

Roadrunner
This uses 2 Bullseye rockets, and if you hit a car with it, it will attach itself to it and cause the car to lose control, if not, it will hit a structure or object and can destroy them too. Enter Up,Down,Down, Fire Machine Gun.

Cow Puncher
Uses 2 Bruiser Cannon shots, can send a car flying if it connects, enter Down,Up,Down, Fire machine gun

Buckshot
Belches 6 Bruiser Cannon shots at once, great at close range, enter Down,Up,Up, Fire Machine Gun

Turtle Turnover
Uses 2 Skyhammer Mortar shots, sends a green projectile that can turn a car completely upside down, good on stalled or still targets, bad on moving ones, enter
Down,Down,Down, Fire Machine gun

Crater Maker
Uses 2-5 Sky hammer shots, 5 if you have 5 or more, and 4 or less if you have less than 5, enter Down,Down,Up, Fire Machine Gun Can make a huge crater when it impacts. The crater will fill back up slowly.

Gravitational Mine
Uses 2 Mines, enter Left,Right,Down, Fire Machine Gun.Anyone that gets near it will be pulled in, and not likely to get out. The afterburner may get you out if you are pulled in. It lasts for about 5 seconds before the mine disappears.

Cactus Patch
Uses 6 Mines, lays a red flashing mine that will split when someone gets near it. It will lay the 6 mines in a group that can cause heavy damage if you drive over it. It is just 6 neatly placed mines. Great against tailgaters. Enter Left,Right,Up,then fire the machine gun to activate

After you enter the directional codes, you then must fire the machine gun (Z at default)

Complete Quest Mode with all the other 12 characters in the game. You can now play as ''Y'' and his vehicle (a flying saucer).