Another "shoot the aliens before they shoot you" game. The aliens appear on the top of the screen and then they go round in a circle. Once one has been shot another appears to replace the dead one.

Fortunately the supply of alien is not inexhaustable, unfortunately when there is only one or two left in the circle they speed up a lot. As well as these aliens there is also a flying egg to be shot, which if it isn't turns into a bird which will crash on the bottom of the screen in a radioactive mess. This will also destroy you should you move into it. If you die, the screen shudders in a very effective way. An interesting variation on the 'Galaxians' theme.