Vigilante 8: Second Offense 

Password screen 
Enter the options screen, select "Game Status", highlight one of the characters, then press L + R. -From: PinheadGun@aol.com

Ultra rez option 
Enter "GO_MAX_REZ" as a password. Note: This code requires the 4MB RAM expansion pak. -From: PinheadGun@aol.com

Invincibility 
Enter "ELBICNIVNI" as a password.

All characters 
Enter "LLA_KCOLNU" as a password to unlock all characters. Note: Their quests will not be completed. -From: HangOveR99@aol.com

All characters have maximum stats 
Enter "LLA_DORTOH" as a password to upgrade all vehicles. -From: HangOveR99@aol.com

Rapid fire 
Enter "RAPID_FIRE" as a password to remove the delay when shooting weapons. -From: PinheadGun@aol.com

Super missiles 
Enter "BLAST_FIRE" as a password to increase the damage from missiles. -From: PinheadGun@aol.com

Faster cars 
Enter "MORE_SPEED" as a password. -From: PinheadGun@aol.com

Heavier cars 
Enter "GO_RAMMING" as a password to increase your car's weight and ramming ability. -From: PinheadGun@aol.com

Lighter cars 
Enter "HI_CEILING" as a password to decrease your car's weight and hover higher than normal.

Fast action 
Enter "QUICK_PLAY" as a password to enable a random fast action arcade feature. -From: PinheadGun@aol.com

Attract enemies 
Enter "UNDER_FIRE" as a password to have three enemies attack simultaneously. -From: PinheadGun@aol.com

Slow-motion mode 
Enter "GO_SLOW_MO" as a password. -From: PinheadGun@aol.com

No enemies in arcade mode 
Enter "HOME_ALONE" as a password. -From: PinheadGun@aol.com

No gravity 
Enter "NO_GRAVITY" as a password to reduce gravity to the point that your car will almost float when a bump is hit. -From: PinheadGun@aol.com

High suspensions 
Enter "JACK_IT_UP" as a password. -From: PinheadGun@aol.com

Big wheels 
Enter "GO_MONSTER" as a password. -From: PinheadGun@aol.com

No wheel attachment icons 
Enter "DRIVE_ONLY" as a password to disable wheel attachment icons from spawning. -From: PinheadGun@aol.com

View all ending sequences 
Enter "LONG_MOVIE" as a password to view all endings in one continuous sequence. -From: PinheadGun@aol.com

Same cars in multi-player 
Enter "MIXED_CARS" as a password to allow more than one person to select the same car in multi-player mode. -From: PinheadGun@aol.com

Disable all codes 
Enter "NO_CODE" as a password. -From: dcomeau@ns.sympatico.ca

Bonus characters 
Complete the following tasks to unlock each character in the game:

Coyotes

Lord Clyde: Complete all objectives in quest mode with Nina Loco, Molo, and Dallas 13. 
Obake: Complete all objectives in quest mode with Lord Clyde. 
Boogie: Complete all objectives in quest mode with Obake. Note: You cannot play Quest Mode with Boogie. 
Vigilantes

Houston: Complete all objectives in quest mode with Sheila, John Torque, and The Flying All-Star Trio. 
Convoy: Complete all objectives in quest mode with Houston. 
Dave's Cultsmen: Complete all objectives in quest mode with Convoy. Note: You cannot play Quest Mode with Dave's Cultsmen. 
Drifters

Chassey Blue: Complete all objectives in quest mode with Astronaunt Bob O, Garbage Man, and Agent R. Chase. 
Padre Destino: Complete all objectives in quest mode with Chassey Blue. 
Dusty Earth: Complete all objectives in quest mode with Padre Destino. Note: You cannot play Quest Mode with Dusty Earth. 
Special attacks 
Interceptor Missiles 

Attack 1: Up, Up, Down, Machine Gun 
Attack 2: Up, Up, Up, Machine Gun 
Attack 3: Up, Up, Right, Machine Gun 

Bull's Eye Rockets 

Attack 1: Up, Down, Down, Machine Gun 
Attack 2: Up, Down, Up, Machine Gun 
Attack 3: Up, Down, Right, Machine Gun 

Sky Hammer Mortar 

Attack 1: Down, Down, Down, Machine Gun 
Attack 2: Down, Down, Up, Machine Gun 
Attack 3: Down, Down, Right, Machine Gun 

Bruiser Cannon 

Attack 1: Down, Up, Down, Machine Gun 
Attack 2: Down, Up, Up, Machine Gun 
Attack 3: Down, Up, Right, Machine Gun 

Roadkill Mines 

Attack 1: Left, Right, Down, Machine Gun 
Attack 2: Left, Right, Up, Machine Gun 
Attack 3: Left, Right, Right, Machine Gun 

Brimstone Burner 

Attack 1: Right, Left, Down, Machine Gun 
Attack 2: Right, Left, Up, Machine Gun 
Attack 3: Right, Left, Right, Machine Gun