"Five Nights at Freddy's" (FNaF) is a popular horror video game created by Scott Cawthon. First released in August 2014, the game quickly gained attention thanks to its unique gameplay and mysterious storyline.

Story: In FNaF, you play as a night security guard working at a pizza restaurant called Freddy Fazbear's Pizza. Your job is to monitor the security cameras and make sure nothing strange happens during your 12am to 6am shift. The problem is that animatronic robots (such as Freddy Fazbear, Bonnie, Chica, and Foxy) often move around the restaurant at night and have the potential to attack you if you're not careful.

Gameplay: The game focuses primarily on managing resources (such as electricity to operate doors and lights) and using security cameras to monitor animatronics. The goal is to survive each night without being attacked by these characters.

Highlights:
- Atmosphere: The sound and lighting in the game are very important, creating a sense of tension and suspense.

- Mysterious storyline: The game has a deep and mysterious storyline, with many details hidden and must be gradually discovered through the game's parts and side documents.

- Multiple sequels: The success of the game has led to the development of many sequels, spin-offs, and even a movie.

FNaF stands out not only for its innovative design and gameplay, but also for its passionate fanbase and Scott Cawthon's creativity in expanding the game's world through sequels and related material.