User Summary An action game in isometric 3D. The player must travel along a highway, avoiding or blasting enemies, while pushing a special weapon which must be used against the alien base at the end of the road. The game box says: "THE ALIENS have invaded earth. There's only one road left to travel, before they reach their final goal - total world domination. Your mission, to halt their advance. And ultimately destroy their alien stronghold, 'Zone Zero'. Under your control are five Vortons. And the 'Lasertron' - the world's most advanced weapon system, which must be taken to Zone Zero to complete your mission. Fail. And face the deadly consequences as the future of earth rests in your hands. So prepare for battle... Prepare yourself for the Highway Encounter."