Unlockables - Twin Calibre
Try entering these codes during gameplay if you need help progressing in the game. If you want to keep these codes enabled continuously throughout the game they must be re-entered when you enter each level.
During gameplay press Up, Right, Down, Left, Up, Down, Right, Up, Left, Down.
Unlock Infinite Ammunition:
During gameplay press Left, Right, Up, Right, Down(2), Right, Up, Left, Down.
Added by: Sanzano Apr 21st 2008, ID#29887