Proteus

The alien craft are armed with heavy laser cannons and are very intelligent. If you succeed in clearing them from a sector, you will be attacked by hunter craft which fire homing missiles at you.

Your craft are armed with a laser and (the famous Abacus) guided missiles. It can rotate or thrust at two speeds. In addition to destroying the transmitters, you are supposed to clear a path through the very dense debris, so that your battle fleet may advance safely.