Twisted Metal : Head On cheats, codes, hints

Unlockable Levels

Greece Death
Match Greece Mini Game
Paris DeathMatch
Paris Mini Game
Roman Ruins DeathMatch
Level Roman Ruins Mini Game
Tokyo DeathMatch
Level Tokyo Streets Mini Game
Transylvania
Beat Transylvania in Story Mode
Transylvania Deathmatch
Beat Transylvania's Minigame

Unlockables Characters

Crimson
Fury Monaco
Hammerhead
Tokyo
Mr. Slam
Los Angeles
Axel
Beat Russia Mini Game

In Game Cheats
Hold L1&R1&L2&R2 during gameplay then press the button combination. Do the same thing to turn it off.
Code Effect

Triangle, Triangle, Down, Down
Infinite Weapons
Up, Down, Left, Right, Right, Left, Down, Up
Invulnerability
X, X, Up, Up
Killer Weapons
X, Triangle, X, Triangle
Mega Gun
Left, Left, Up, Down, Left, Right
Radial Blast
Triangle, X, Square, Circle
Trade Weapons for Health