Star Shield Down Steam price comparison

For centuries the Gorlakari Empire have tormented your people with continual raids on your star systems. Now a new threat has emerged where the Gorlakari have developed a multiple layered shield system of immense power. The technology is advancing quickly and there is no choice but to find their prototype ships and destroy them. Your star fighter must be used to eliminate all twenty of the increasingly more powerful Gorlakari StarShield Destroyers before it is too late.