Some whales travel from the Arctic Ocean to Bach to rock. The bad news is a whaler in the area attacked them. You must use your submarine to shoot nets and harpoons, and radioactive debris to save the whales.
Once you start the game, the whales will move from left to right along the bottom of the screen. The vessel will start to throw nets or harpoons, depending on the settings, to kill whales. You must be focused on the web, in any direction and shoot them. After several screens / harpoons were sent radioactive debris will flow to the right side of the screen. It's too high to harm the whales, but it can hurt you. It is also necessary to remove it. If your sub gets five times, the game is over. In a game with two players, one player-Sub and another whaler.