Ultimate Custom Night (UCN) is a free-to-play survival horror game by Scott Cawthon, serving as a massive mashup of the Five Nights at Freddy's (FNaF) series, where players survive against 50 selectable animatronics in a customizable office. It's a "greatly expanded" version of the "Custom Night" modes from previous games, allowing players to set the difficulty (0-20) for each character and use various tools like heaters, A/C, and laser traps to survive. The game features a challenge menu, unlockable content, and voice acting, and is known for its high difficulty and replayability.
