Although Moon Shuttle is a little bit more than just another invasion game, it's highly unlikely that the program will ever create a big stir because invasion games, in general, have fallen to the wayside. However, for the true believers, Moon Shuttle is a welcome addition.


Based on the Nichibutsu coin-op, this program features five screens, only four of which are filled with invaders. The fifth screen, which appears before each of the others, is a series of asteroid belts through which the player must navigate his ship. The only problem is that with each successive appearance, more and more of the asteroid belts begin moving.


As stated before, there are four types of invaders: bomb launchers (which look like floating heads wearing sunglasses), expandos (syringes by any other name), man-o'-wars (loose brain matter), and blob men (sunbursts). Each has its own distinctive traits. The bomb launchers, for example, rotate while crossing the screen. The blob men split into two when fired upon.


Although the play-mechanic in Moon Shuttle may be a trifle old hat, the game itself is fairly addictive and well worth a look by anyone who enjoys repelling invaders.