The board game Battleship brought to the Gameboy in Game A. A naval shooter in Game B
 Game Play
In Game A, you can play the classic board game Battleship either against the game or a friend. You can choose grid size, whether or not you want to have your aircraft carrier launch fighter jets, whether or not you want an alarm to go off when you fire a near miss, and your (and the CPU's) commanding officer.
In Game B, you enter your fleet's submarine and try to sink the enemy fleet before they sink you or your fleet. You have machine guns and torpedoes at your disposal, and you can dive underwater to look at your sonar and escape enemy fire. You can earn upgrades to your movement speed, twin torpedoes, and power sonar. The enemy can either be the game or a friend with the game.