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

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

Enable Ultra high Resolution
Enter the password MAX_RESOLUTION.

Roadkill Mines
Cactus Patch: Left-Right-Up-Fire Machine Gun
Cost: 2 to 6 Mines

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

Sky Hammer Mortar
Turtle Turnover: Down-Down-Down-Fire Machine Gun
Cost: 2 Shells

Bull's Eye Rockets
Stampede: Up-Down-Up-Fire Machine Gun
Cost: 5 Rockets

Interceptor Missiles
Halo Decoy: Up-Up-Down-Fire Machine Gun
Cost: 2 Missiles

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

View all Endings
Enter the password LONG_SLIDESHOW.

Unlock Levels
To unlock all levels, enter the password LEVEL_SHORTCUT.

Super Hard Difficulty
Enter the password I_AM_TOUGH_GUY.

Slow-Motion
Enter the password GO_REALLY_SLOW.

Remove all Enemies
Enter the password POPULATION_OUT.

Reduced Gravity
Enter the password A_MOON_GETAWAY.

Rapid-Fire Weapons
Enter the password FIRE_NO_LIMITS.

God Mode
For invincibility, enter the password LIVING_FOREVER.

Enhanced Missiles
Enter the password MISSILE_ATTACK.

Classified Secret Moves
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

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

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

All Vehicles (Except the Alien)
Enter the password GANGS_UNLOCKED.

Alien Vehicle
Enter the password GIMME_DA_ALIEN.

Code
Enter the password JTBT7CFD1LRMGW to open up all the stages and cars.