Barotrauma

Barotrauma is a 2D co-op survival horror submarine simulator set beneath the irradiated, icy surface of Jupiter’s moon Europa. You and your crew travel through a dangerous underwater world, completing missions for humanity’s last remnants, exploring the ruins of an alien civilization, and fleeing or fighting alien sea monsters. The game combines teamwork, ragdoll physics and the threat of betrayal aboard your submarine.

Europa and its factions

Explore a procedurally generated world and discover what lies in Europa’s depths. You can make allies or rivals among the world’s four factions: faction and reputation systems let you choose who to support, help their cause and gain benefits, or face the consequences of your choices. Procedurally generated missions and multiple game modes provide varied ways to play.

Crew and cooperation

A submarine can carry up to 16 players, with bots available to supplement the crew in singleplayer or multiplayer. Six classes have different skills and duties: Captain, Engineer, Mechanic, Medic, Security Officer and Assistant. Each class has three specialization talent trees; you gain experience and unlock talents to shape your character.

You can work together to meet your goals or face betrayal if a traitor is aboard. Play with friends, strangers or rivals, and communicate as you navigate, operate the submarine and respond to danger.

Run the submarine

Operate systems and equipment including sonar, the nuclear reactor, weapons, engines and pumps. You can also master the submarine’s wiring, crafting and medical systems. Gather materials to make equipment, weapons, medicines and other supplies for the crew’s survival.

Create and mod

Built-in editors let you create submarines, characters, procedural animations and monsters, including creations to rival the standard ones. You can share and discover mods through Steam Workshop. Most game data is exposed in XML, and the game’s source code is publicly available on GitHub for modding.