The game rewards strategy and careful attention to orbits, aiming, and gravity. Ammo is unlimited, but you can only fire one spread of Photon Torpedoes and just three Proximity Bombs at a time. Your Phaser has to recharge between uses. You start in a near circular orbit - it's best to not use thrust until you need it to correct your orbit - or flee from the alien's weapon.
ED-II adds a targeting marker that makes your ship much more deadly, as well as the new Proximity Bomb. December 2025: -added a marker ring to the alien weapon - stay out of its radius if possible - end sequence more dramatic - the orbit predictor is brighter and stops at the edge of the screen
