"Two rival space outpost's try to knock over the opponent's space fleet, but there is a new angle! Missiles must rebound off of back or sides of game board to hit targets. Play area measures 15 3/4 x 13 1/4 x 2 1/2 inches high. Plastic. Imported. For 2 Players. ... For ages 5 years to Adult" —description from the Sears Christmas Catalog 1983, page 585 Each player takes turns firing spring loaded cannon at the other player's ships. A BB would arc across the tilted play area and land on the opponent's side, hopefully hitting their ship. If hit, the ship would flip over revealing an explosion sticker. While the official rules encouraged alternating one shot at a time, shots could be fired rapidly, with only your BB supply the limiting factor. As your opponent also fired it would replenish. Similar to Epoch's 1974 Torpedo game, but with a self recycling ball mechanism that removes the fuss and set up of that game. —user summary