This sequel to 'Invasion of the Air-eaters' has the aliens of the title staging another invasion a century later. This time the war is fought over the entire inner solar system, using 240 counters that represent a variety of space- and ground-based units. From the box:'Turns are three months, planets move in orbit and spaceships move from planet to planet. Separate ground actions occur on maps of Mercury, Earth, Mars, the Venusian poles, Ganymede, Callisto, Europa, and Io -- all in the same scale. ... Rules cover production, technology, teleportation, combat, and movement.'Actual playing time will vary the box says three to six hours. This is Metagaming MetaGame #1 (product #5101). - BoardGameGeek