Extreme Assault (PC)
Etreme Assault u.s cheat codes=type "oh dear" (small letters) in the main menu. After that you will have various cheats. Single player only. alt + 1 = full ammo alt + 2 = upgrade current weapon alt + 3 = full energy alt + 4 = indestructible alt + 5 = wow alt + 6 = mission compleate alt + 7 = deactivate enemies alt + 8 = heli mode alt + 9 = tank mode alt + 0 = speeeed!