Submarine Ace is a free simulation game available on Android, where players take on the role of a submarine commander during an ongoing industrial-era conflict between two nations. As you navigate through various missions, the game emphasizes the strategic management of your submarine's systems, including operating levers, pressing buttons, and controlling critical instruments within the cockpit.

The game features a detailed submariner's handbook that aids players in understanding the mechanics of their submarine. Players will manage electric engines, charge batteries with diesel engines, and maintain oxygen levels while submerged. The game also incorporates elements like sonar for detecting enemies, sounders for ground detection, and the potential for hull damage from collisions and pressure changes, adding layers of complexity to the gameplay experience.