Fire Fight Cheats

Press C + W + [Keypad Plus] during
game play. The word "Cheater" will be spoken to confirm
correct code entry. Press [F12] to select restore shields,
full weapons, or God mode cheat options. Select one of those options,
then press [Enter], [Esc] to activate that function.
To select a mission, open the mission menu and press [F12]
after highlighting a mission.