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The best of the bunch in my opinion. There three levels of difficulty and a few more targets to shoot at. There seems to be much more happening that in the other titles, but like all Invader games, there's only so much for you to do.

Galactic Trooper, also for the 16K ZX-81, is in a similar vein. Again, you must be careful to read the instructions, as the graphics are a little confusing and they will not be explained again once the game has started.

The idea is to amass as high a score as possible by destroying a galactic attacking force and prevent it landing on earth. If a landing craft touches down, you lose your firing base.

The screen display shows the enemy mothership, worth 500 points, ranging back and forth above the ranks of drones; drones give you 20 points if you shoot them before they drop, 40 points if you catch them in mid-air. A mystery score is attached to the saucers, otherwise known as landing craft. You receive an extra ship if you reach a score of 10,000 points.


Unless you are an experienced player, you may not find that easy. Although it is easy to increase your score quickly at the start - just keep firing - stopping the saucers landing and putting an end to your activities is a good deal more difficult. Again, not a strikingly original game, but one which should appeal to addicts of the fire button.

Available from Romik Software, Berkshire.