Killer 7 GameCube Cheats

       Unlock Killer 8
Clear the game and unlock Killer 8 mode, where the changes include:

    * Enemy critical spots are invisible
    * Enemy explosions do five times normal damage
    * Clue and map icons are hidden on the map menu

Unlock Hopper 7
Unlock Hopper 7 mode by clearing Killer 8 mode. Hopper 7 only plays through the first stage.