Global Defense

Arcade translation of Sega's SDI. You pilot a satellite in outer space. Your job: To destroy alien attackers who are waging a nuclear war against planets in the solar system, including Earth and even the moon! What's unique about this title, is the satellite and your primary weapon move independently of each other. Position your satellite too far away from the action and the bullets take too long to hit your target. It's a good balance between dodging objects crucial to your survival and shooting down the enemy targets. If the planet takes too much damage, you lose. There are both Offensive and Defensive battle modes. There is also a 2-player mode where you and a friend can team up, one controlling the satellite and the other controlling the weapon making this a multiplayer game as well.