Submarine Sim MMO is a free 3D multiplayer submarine battle adventure game developed by Cyclops Games for Android devices. The game is a new version of the original Submarine Simulator 3D, with improved features and gameplay. In this game, you battle against a rogue warlord's navy that has set up port in the remote islands off Russia's Kamchatka Peninsula. Sink cruisers, destroyers, weapon-carrying cargo tankers, and drug-running fish boats in this exciting simulation game.

One of the exciting features of the game is the ability to outwit competing submarines in multiplayer mode for salvage and gold bars. The game features six modern submarines that you can command, and you can restock your torpedo supply by salvaging them from ships and submarines you sink. Explore the seafloor for crates of ammo, repair equipment, and gold bars, and use your periscope with homing torpedoes to blow up enemy vessels.

Overall, Submarine Sim MMO is an exciting game that offers a thrilling simulation experience. However, the game is still in beta version, and the multiplayer logic is still being perfected. The game developers are constantly updating the game to fix any bugs or problems, and they encourage players to send them feedback to make the game better.