The world was attacked by carnivorous Flutter Drones and so a network of towers was built with a powerful scanner weapon. The menace was defeated, the towers decayed, but now the drones are back and only you and the one working tower - scanner 13 - can destroy them. But first, you must discover how to work it!

This is described as a graphic adventure game but is actually more arcade oriented. Written in Basic, it nevertheless produces good sound and colourful, effective graphics. The response to the player is good, screen display and error-trapping is excellent.

The scenario was given after a first time load, along with a page of "advice" on controls. There are three skill levels and nine contrls (effectively seven because two controls are to repeat scenario and advice screens).

Much of the fun is in deciphering the displays, although once mastered, there is plenty of action in trying to destroy the drones, air mines, etc, without being annihilated yourself (and you only have a limited amount of energy!)

R.E.