Zarxas

A platform game from Beoid Varasse and pulbished in 1987. On each screen, there are several beacons to collect, but you have to collect each beacon in a particular order. In addition, there are several aliens who will climb ladders and ropes to catch you, although you can shoot holes in the platforms to prevent them from doing this. However, they always try to take the shortest route to you, and evading them is often very difficult. Comes with a built in level editor.