Second sequel to Rescue Terra I. A screenshot of this unreleased game was shown in the May/June 1983 issue of Tilt magazine. Description: "You have traveled to Terra I and destroyed the computer system thus returning planetary control to the colonists. Terra I is now shipping Zenbar crystals to Earth's solar reactors for energy conservation. Solar Defense is a 4K game depicting action on one of Earth's orbiting solar reactors. The station is under heavy alien attack and you have all you can do to defend it. Help is on the way if you can hold on long enough."