All cars:
Enter GANGS_UNLOCKED as a password for all cars. Note: This does not unlock the UFO.

Y The Alien:
Enter GIMME_DA_ALIEN as a password. This character is normally unlocked after completing quest mode using all other characters.

All characters and levels:
Enter JTBT7CFD1LRMGW as a password.

Same vehicle in multi-player mode:
Enter MIX_MATCH_CARS as a password.

Ultra-high resolution mode:
Enter MAX_RESOLUTION as a password. Note: This code requires the memory expansion pak.

Interceptor Missile power-up:
Enter MISSILE_ATTACK as a password.

Invincibility:
Enter LIVING_FOREVER as a password.

Big wheels:
Enter MONSTER_WHEELS as a password.

Quick firing weapons:
Enter FIRE_NO_LIMITS as a password. Note: This does not effect the machine gun.

Low gravity:
Enter A_MOON_GETAWAY as a password.

No enemies:
Enter POPULATION_OUT as a password.

Slow motion mode:
Enter GO_REALLY_SLOW as a password.

Expert mode:
Enter I_AM_TOUGH_GUY as a password.

Level select:
Enter LEVEL_SHORTCUT as a password.

View ending sequences:
Enter LONG_SLIDESHOW as a password. View any character's ending to see all the game's endings in sequence.

Super Dreamland 64 level:
Enter DDDDDDDDDDDDDD as a password.