@bythedreadwolf You can't totally turn aliens and vampires off. Aliens are part of the scientist career and need to be spawned for specific events and tasks related to the career, they also need to be spawned on Sixam. And vampires need at least the Grand Master vampire to be functional in game. I think you can safely delete them in other cases but for all I mentioned, you actually can't remove them totally. At best, I think it's possible for a modder to modify the way they spawn a bit. But nothing going any further than that because that would break the game.