It's been called the "scariest game in years". It's at the top of iOS and Android app stores, it has torn up the Steam charts on PC. It has racked up millions and millions of views (and screams) on YouTube. It has hundreds of earnest fan games, and dozens of rabid fan theories. The Five Nights at Freddy's hype train is incredible.

It's easy to get caught up in the jumpscares of Five Nights at Freddy's and leave it at that. But underneath those scares, there's a very disturbing story hiding in the background of the series -- and players are still hard at work at trying to figure out all the details.

If you've played Five Night's At Freddy's (or the sequel), then you've probably heard all sorts of rumours and theories about the game. That's because there's way more going on in Five Nights at Freddy's than the game lets on.