
It was released on June 27th, 2018 on Steam and Game Jolt.The game allows the player to choose from 50 characters from all six main Five Nights at Freddy's games and FNaF World, and set their difficulty levels for the night from a minimum of "0" to a maximum of "20". It is by some considered FFPS's Custom Night, even though it is its own independent game, having a Steam page. Ultimate Custom Night, often abbreviated UCN, is the eighth installment in the Five Nights At Freddy's franchise, and the successor of Freddy Fazbear's Pizzeria Simulator.
Of these extra nine, Dee Dee from FNaF World, has the ability to randomly spawn and summon either a character that isn't currently active or one of six that are unavailable to the player, with a new form of her named XOR being able to summon all of the extra six. In the final release, 59 characters from the franchise were included, with some appearing without the player's choice. To 6 a.m., with each hour in-game lasting 45 seconds. The objective is to survive from 12 a.m. The player is also able to select the office setting, choose power-ups that may help them during the night, and select 16 challenges available to them. The player can earn "Faz-Coins" to buy power-ups, plushies to stop certain animatronics, and a "Death Coin" to eliminate an animatronic of the player's choice from the current night.

It's implied that the other children's spirits have already moved on, but Golden Freddy refuses to do so.Ultimate Custom Night is a Survival Horror game created by Scott Cawthon. During the night, if Old Man Consequences is set to "1" and all other characters are inactive, then, after catching a fish, a scene from FNaF World will be shown, with Old Man Consequences talking to a bear sprite (possibly Golden Freddy), telling him to leave the "demon" (Afton) to his own demons and rest in peace. A rare screen also shows an obscured face of a small, grinning child thought to be the " vengeful spirit". The entity is widely regarded to be the spirit living inside Golden Freddy because, after unlocking every intermission cutscene, a cutscene of Golden Freddy, twitching and surrounded by darkness, is shown.
Ultimate Custom Night Series Is Canon
Although it was never confirmed if the Fazbear Frights series is canon or not, Cawthon confirmed that it's supposed to reveal mysteries from the previous games.In February 2018, after the release of Freddy Fazbear's Pizzeria Simulator, Cawthon announced in a Steam post that he would think about gaining help from larger publishers in making future games. In the following book, Blackbird, the epilogue confirms that the man is actually William Afton. This comes from the fifth book, Bunny Call, which has a story called "The Man in Room 1280" where a burned man is kept alive by a shadow child despite the fact that he should be dead and suffers nightmares. This time, the campaign will be left to move to individual player-configured nights or selected from a list of themed challenges.However, the anthology novel series Fazbear Frights implies that the game is actually Afton's repeating nightmare, and not hell or purgatory.
The game was due for release on June 29, 2018. As he was programming the characters in the game, he would update the "progress bar" on his website, along with a brief description of the characters on a Steam post. After realizing the size of the update, Cawthon decided to make it its own separate game.

