Extreme Assault Cheats
Type oh dear at the main menu to enable the codes:
[ALT] + 1 - Full ammo
[ALT] + 2 - Upgrade current weapon
[ALT] + 3 - Full energy
[ALT] + 4 - Invincibility
[ALT] + 5 - ???
[ALT] + 6 - Complete mission
[ALT] + 7 - Deactivate enemies
[ALT] + 8 - Helicopter mode
[ALT] + 9 - Tank mode
[ALT] + 0 - Speed