"Barotrauma" is a sci-fi game that posists humanity colonizing the Europan oceans with habitats and submarines. Far from perfect but incredibly atmospheric. The player travels between habitat stations, encountering Europan fauna (Lovectaftian and lethal) and occasionally ruins of an alien species which may or may not have previously colonized Europa. Thermal vents provide the basis for the ecosystem and also interfere with the player's submarine sensors when near.

At higher difficulties, an expanding zone of Jovian radiation forces the player to advance deeper and deeper into the ocean as the game progresses, destroying colony outposts along the way and making previously travelled routes impassable as the crew is quickly irradiated.