Five Nights at Sonic's 3 Reburned is a single-player horror game in which players assume the role of a nightguard tasked with surviving against various animatronic and clone characters in a haunted facility. In this game, the storyline is set in 2027, focusing on a story unit where broken and unused robots and clones from previous Sonic and Mario-themed games are kept. The narrative explores the origins of these characters, their deterioration, and the chaos that ensues when they malfunction and turn hostile, including a possessed Boo and a vengeful Salvage Sonic. It stands out with its complex storyline involving multiple characters, hallucinations, and a series of mini-games that reveal deeper lore. The game features advanced survival mechanics, including managing limited power, navigating through a burning building, and escaping from deadly threats, all set within a dark, horror-themed environment.