Super ZX80 Invasion
is a fixed screen shoot 'em up most similar to Space Invaders
. The player controls a laser gun at the bottom of the screen that can be moved left and right and has to shoot down the aliens that move around above him while at the same time avoiding being shot by them. Unlike the original Space Invaders there are no shields to hide behind and no flying saucer. Once all aliens have been killed a new wave appears. The player has five lives and when they're all out the game restarts. The ZX80 version has both 1K and 2K versions of the game. The difference between them is that the 2K version can have more aliens (20 instead of 12) on the screen and that it keeps track of number of waves completed.