In 2222 AD, three exploratory ships left Earth in search of new worlds. They disappeared shortly after reaching the planet Voltegus. Less than a week later, a Volegian battle fleet materialized in Mars orbit, attacking anything in their path, and headed on a direct path for the planet Earth.
An early and passable stab at making an R-Type clone for the G/MD. Not much of a challenge to jaded shooter fans, but a good start for newbies and decent enough for the casual gamer.