Submarine Commander is a naval simulation game for the Atari 2600 where players take control of a submarine with the mission to patrol the waters and engage enemy targets. As the commander, users navigate their sub through varying ocean depths to avoid detection while using periscope views to locate and destroy enemy ships and submarines. The game falls under the action and simulation genres and challenges players with fuel management and strategy to balance between aggression and stealth. Realistic sound effects and period-accurate visuals enhance the gameplay experience, providing a tactical wartime submarine simulation.