You are at the helm of a submarine equipped with radar, sonar depth charge indicators, torpedoes, and fuel and temperature gauges. As commander of the submarine, you must sink the enemy ships before running out of fuel. Once your fuel level reaches zero, the game is over.

You are at the helm of a submarine equipped with radar, sonar depth charge indicators, torpedoes, and fuel and temperature gauges. As commander of the submarine, you must sink the enemy ships before running out of fuel. Once your fuel level reaches zero, the game is over.