Paranoia is one of the keystones of horror. They really are all out to get you. Any smiling face could be a waxen mask concealing a horrible mess of slimy tentacles, or warp into the fanged maw of a werewolf, or be perfectly human but still betray you to the darkness. There are unknown armies moving in the shadows, cults and conspiracies that serve dark goals or dark masters. There are also groups who hunt the darkness, who oppose these cults – or who are cults themselves.