Battle Shark is a 1977Nintendo developed arcade game. It's a shooting light gun game that has a machine, gun-like controller. The goal of the game is to shoot down a torpedo boat and cause it to explode. The game machine has a 16mm-movie projector that projects the images on the arcade screen. If the player gets a score of 8 or over, he'll be given a free game. Each game will give the player 70 seconds.