This is one of the nicest original machines we have seen in a long time. It has a solid cabinet all around. The cabinet art and control panel are in very good to excellent condition. The seller told me that this was in a home for most of its life. It has all the original hardware. The monitor has been fully rebuilt with new capacitors and flyback. It is nice and bright with great colors. New light bulbs.

Defend the human population from swarms of attacking aliens. Extremely popular, even though, because of its difficulty, it was deemed a flop at a 1981 Chicago arcade machine trade show. The attract mode for the game was programmed in just five hours.