Memory Required: 16K
A close copy of the original. Slightly better graphics than Space Intruder; for instance, the shelters erode away when hit, and the aliens are better drawn. On the other hand this is slower than the Quicksilva version, so it loses it interest pretty soon.
Another Invader copy which has dated badly. The graphics were more interesting than in Space Intruder, but generally far too slow to be much fun for long despite the machine code.