You start off aboard a ship, in the home sector of Sol, and must go to the navigation computer to choose a sector to enter - the number of Seiddab it contains is indicated. Once there, the action is a side-scrolling shoot 'em up on a looping Defender-style playfield, with rocks to avoid as well as the Seiddab. Leaving via the portal you used to enter takes you back to the navigational screen.
However, many sectors also contain Seiddab bases (which look like pylons). Enter one of these and another game section begins, this time an arcade adventure set within the base. Each star-base has its own way to be destroyed using the objects you'll find and manipulate, and you'll have to work this out as well as shooting any Seiddab you do find.
Martin Smith (63241)