A sixteen screen fast-action classic arcade battle between alien forces from the planet Alpha and a lone Federation battle cruiser with it's supply consort. As commander of the battle cruiser, your survival depends on your ability to out-wit and out-gun the Alpha. If you survive the first two stages of the battle, you will be forced to negotiate an asteroid belt in order to reach your supply ship. You must then manoeuvre your craft into position for docking, in order to take on fresh supplies of ammunition and fuel.
Once the supplies are on board, you are ready to do battle once more but each time you return to the fight you will find the Alpha even more tenacious.