Weird things are happening on Planet Nebulus. Someone or something has begun building huge towers on the sea floor without a construction license. Your mission is to ascend each of the eight cylindrical towers, passing various obstacles along the way, and to trigger the tower's destruction mechanism to demolish the evil threat. Praised upon its original 1987 release for its graphical innovation, this is considered to be the most outstanding game from Hewson. Don't miss out on this classic favorite.