Exit Now: Horror Hotel: Online

As first-person horror video games try to simulate real life, this game does the opposite -- real life trying to simulate a horror video game.  That's something that the live version doesn't give you, which makes this a rather unique experience.  (Including the video-game trope of often frustratingly having no actual control over the player avatar during "cutscenes".)  The area of the space is amazing.  Make sure to watch this in a dark room with headphones for the full effect.