A slick version of that old favourite, Galaxians.

The one, or two, players can choose from three levels of difficulty: slow, fast and very fast. There are ten screen presentations each with a different swarm of alien beings bent on your destruction. Your spaceship, armed with three missile batteries, resides at the baseline of screen display and is moved left or right by joystick control. Unfortunately, there is no repeat-fire facility when pressing the stick button.

The instructions tell us that the spaceship's centre missile is fired first, followed by two outer wing missiles. I found this happened only occasionally - mostly the centre missile alone would fire off. It was also possible for my ship to receive a direct hit but not blow up. Hyperblast's graphics are agreeable, with the action set against a scrolling starry universe, speckled with colour.

I should point out that this game is a fairly standard version of the invader type, so if something similar lies in your software library you may want to look elsewhere. On the other hand, if you enjoy downing aliens by the barrel-load, Hyperblast is for you. Joystick needed.