Along the way, you'll unlock new skins for the office, as well as some cutscenes. The goal of the game is to try to survive the night with more and more characters on harder and harder difficulties, with each level added increasing your score at the end of the night. The twist: this time, the series brings back various animatronics from previous games, more than 50 in total! Many of these characters have returning mechanics, while others have whole new mechanics designed specifically for this mode.

True to its name, the game is an expansion of the traditional Custom Mode, allowing the player to set the difficulty of each animatronic individually, ranging from 0 to 20. Originally intended as free DLC for Freddy Fazbear's Pizzeria Simulator, the mode eventually grew so big that Scott Cawthon decided to release it as a standalone game.

Relased on June 27, 2018, Ultimate Custom Night is the second spin-off game, and the eighth game overall, in the Five Nights at Freddy's series.