A remake of the much feared third deck of Citadel station, from System Shock. In the original there were "invisible mutants" roaming the corridors, looking for a hacker to feed on. They weren't completely invisible, but they were hard enough to see that they often caught you by surprise. Not to mention they hurt a lot and were difficult to kill. Thankfully, no mutants here, just some bots or friends to go kill.
This is a direct port of the Unreal map, with a Domination version added.