Vigilante 8 

All vehicles 
Enter "GANGS_UNLOCKED" as a password. Note: This does not unlock the UFO.
"Y" the Alien Enter "GIMME_DA_ALIEN" as a password.

Super Dreamland 64 level 
Enter "DDDDDDDDDDDDDD" as a password. Alternatively, successfully complete all 
of "Y" the Alien's missions in "Quest" mode to unlock the Nintendo 64 exclusive bonus level.

All vehicles and levels 
Enter "JTBT7CFD1LRMGW" as a password.

Level select 
Enter "LEVEL_SHORTCUT" as a password.

Invincibility 
Enter "LIVING_FOREVER" as a password.

Missile power-up 
Enter "MISSILE_ATTACK" as a password.

Quick firing weapons 
Enter "FIRE_NO_LIMITS" as a password.

Ultra-high resolution mode 
Enter "MAX_RESOLUTION" as a password.

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

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.

View ending sequences 
Enter "LONG_SLIDESHOW" as a password.