[1] This game used two LaserDisc players simultaneously for the outer space background, while computer generated graphics were overlaid on top.

Zol serves as a diplomatic space port of tremendous importance of intergalactic relations, but its gravity is unstable, causing serious problems for spaceships trying to land or take off.

Investigations uncovered a gravitational quirk in one of Zol's giant craters, and the search for the source has begun.

And the source is found, a horrifying and unspeakable discovery, beneath the crater there is an alien life of unimaginable size—the great threat of humanity—Zolgear.

In the canceled Japanese real-time strategy game New Space Order, the Zolgear would have been a player-controllable unit (treated as a "planet buster" unit, which can reduce a targeted planet's population to zero) in the "Sacred Religious State" nation.