In this interactive roll-and-write game, players draft dice and shoot torpedoes at their enemy submarine. The torpedoes are fired in the same formation as the pips shown on the dice. Players can modify their dice rolls in various ways after activating one or more of their submarine's systems, such as the engine or propeller. But these systems may not last long, as they are being targeted by the enemy. The first player to destroy all of their enemy's vital systems, without running out of spare torpedoes, is the winner. -description from designer