Five Nights at Freddy's: SL is a survival horror game developed by Scott Cawthon. The game follows the concept of the previous games in the series, but it introduces new mechanics and features. In this game, the player takes on the role of a technician hired to repair cartoons at Circus Baby's Pizza World. However, when the player enters the facility, they realize that something is not right.Five Nights at Freddy's: SL is divided into five nights, each with its own unique challenges. The game also features a custom night mode that allows players to set their own difficulty level. On each night, players must travel through a series of rooms, including the main control room, the Circus Gallery, the Balora Gallery, the Happy Hour Auditorium, and the Scoop Room. Each room has its own set of challenges and threats.

One of the main threats in Five Nights at Freddy's: SL continues to be the dolls themselves. A new series of dolls appear in the game, including Circus Baby, Ballora, Funtime Freddy, Funtime Foxy, and Ennard. these dolls are programmed to capture and kill the player as they move through a series of vents and paths through the facility. To avoid being caught by the dolls, the player must use a range of tools and strategies. The game has a series of cameras that allow the player to monitor the movement of the dolls. Players can also use audio cues to lure the dolls away from their location. another important aspect of Five Nights at Freddy's: SL is the use of repair tools. Players must use these tools to repair various systems throughout the facility, including the ventilation system, the power supply, and the dolls themselves. If any of these systems malfunction, the dolls become more aggressive and more likely to capture the player.

The most challenging aspect of Five Nights at Freddy's: SL is the game's audio system. The game has a series of audio cues that players can use to distract and misdirect the dolls. However, these audio cues also draw the dolls towards the player's location, so the player must use them strategically.