Designed by the creator of Star of Africa, players travel across Mars reach the island city of Horz to find out the whereabouts of the weapon's blueprint, carved on a wall of an ancient temple. From there the race continues to the desert city of Kalat where the blueprint itself is hidden. The expeditions can proceed by three different routes: by radium canals, submarine routes, or gas tracks. The game is played without a die with cards corresponding to those routes (radium, sukellus, kaasu). All three different passageways available - radium canals, submarine routes, and gas tracks - have corresponding cards (radium, sukellus, kaasu). Movement on the board is determined by the numbers and letters on each card. The first place to find the weapon, wins.