Something I made in a game called Barotrauma called an Alien submarine. This is an attack deep diver class submarine made for long periods of combat against abyssal creatures and other submarines from pirates, separatists, or even the coalition. The lore of this submarine was that it was found by the Europan Coalition during an excavation of a large set of alien ruins where they find this incomplete submarine in a ancient dry dock, after careful studying and a long time of reconstruction by a team of engineers they managed to reconstruct the submarine into operational status but had used a lot of their technology to fix major systems and adapt it for human use. this submarine is armed with the latest tech the coalition has to offer and is armed to the teeth, however due to it's weight it is propelled by three engines.

credits go to the wonderful mods made by people on the workshop and Undertow Games for making Barotrauma