At the extras menu press: Down, Right, Down, Right, Up, Down, Up, Left. To unlock
all single and multiplayer levels, options, and content.
Full Health And Armor
While playing, pause the game and press: R(2), Black, White, Black, R, L, Black.
All Multi-player Mode Skins
At the extras menu, press Down, Left, Up, Left,
Right, Down, Left, Up to unlock all multi-player
At the extras menu, press Right, Left, Right, Left, Down(2), Up(2) to unlock paintball mode.