Five Nights at Freddy's is a horror game, also referred to as FNAF, it is a game where you are in an office on night watch, it's your summer job, and you must survive five nights on a limited power supply, you must check your cameras and lights for the doors to make sure that there are none of the Animatronic Characters are coming for you, and if they are you must close your doors which costs power. Animatronics are best avoided. There is a Five Nights At Freddy's 2, which is apparently a prequel.