Five Nights at Freddy's ( FNaF ) is an American media franchise created by Scott Cawthon. The first game of the same name was released on August 8, 2014 and has since become a worldwide hit. The main series consists of nine survival horror video games taking place in locations connected to a fictional family pizza restaurant franchise named "Freddy Fazbear’s Pizza", after its mascot, the animatronic bear Freddy Fazbear. In most games, the player assumes the role of a night-time employee, who must utilize tools such as security cameras, lights, doors, and vents to defend themselves against hostile animatronic characters that inhabit the locations. The series' lore is gradually revealed through voice recordings, minigames, and easter eggs featured throughout the games.

The series of works are mainly produced by Scott Cawthon and generally run in PC games and mobile game modes. Scott Cawthon had developed a number of different children's mini-games before launching this game series, and the idea for Five Nights at Freddy's grew out of a negative reaction to Scott Cawthon's previous game, the family-friendly Chipper & Sons Lumber Co. Some critics, including Jim Sterling, lashed out, pointing out that the characters, intended to be cute, seemed to be unintentionally made to look like scary animal mechanical dolls. After getting out of the haze of being denied, Cawthon, who had previously developed games mainly for Christianity, decided to take advantage of this design feature to make a new game that was intended to scare players, and Five Nights at Freddy's was born.

Simple game controls, terrifying mechanical animations, and hidden mysteries have all become the popular elements of these games. The franchise also includes spin-off games and other media, such as a novel trilogy and an anthology series, comprising an all-encompassing fictional universe. The franchise maintains an active fanbase, known for its production of fan art and fangames, and merchandise for the games is available internationally.