Lord Scylla, ruler of six galaxies, has declared eminent domain over ours. Zycon, the commandant of Scylla's Imperial Fleet, has already conquered or annihilated all human outposts and colonies, and recommends immediate surrender, tribute, and the submission of some representatives as laboratory specimens.

Standing in Zycon's way is your fast, deadly ship and skills as a pilot. This ROM cartridge game puts a joystick in each of your hands, and an Ion engine, hyper-drive, and twin Masor canons at your command. The game screen provides a view looking forward out of your craft, two Short Range Sensors showing incoming enemies ahead and behind you, and a power meter. Each hit by an enemy blast reduces your power and briefly scrambles your view. Four levels of play culminate in a campaign where you jump from sector to sector eradicating enemy ships in dogfights with up to four opponents. A Long Range Sensor screen shows the status of your ship's various systems, how many enemies are in each sector, and where to find space stations. To be recharged and repaired, you carefully maneuver your ship to the correct position and speed to receive a power pack from the space station.

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