The Shadow Master has consumed all of the resources of his own planet.
Now, he is heading to Earth to steal its resources. It is up to you to
strap yourself into a space vehicle and defend the planet. Travel to
seven worlds, as you undertake 16 missions that will decide the fate of
the planet. Along the way, you will have to destroy ceaseless hordes of
enemies. Do you have what it takes to save the planet from the SHADOW
MASTER?