Addictive, exciting, fast-moving, a very good game this.

Using either keyboard or joysticks you must manoeuvre around the mazes on various levels of the city of the Zerons until you find the volcanic plug on the lower level.

You plant a plasma bomb against this and then re-trace your steps to the surface before the subterranean metropolis is destroyed by a tide of molten lava.

Besides displaying the maze adjacent to you the screen shows the state of your life support systems and a map of the city level you are on, with a coloured cursor indicating proximity of a lift to take you to the next level.

You are able to destroy the Zerons with your Fire Blaster but this is not necessarily a good idea because, understandably, the more of them you kill the more annoyed the survivors get.

The only snag was dragging myself away from the computer!

D.J.