- Acting for Two: Due to the Loads and Loads of Characters in the game, there are plenty of examples; Matthew Curtis voices both Music Man and Nightmare Balloon Boy, Jena Rundus voices both Mangle and the Marionette, Stephanie Belinda Quinn voices Dee Dee note and Lefty, and Joe Gaudet voices Mr. Hippo, Rockstar Foxy and Funtime Foxy.
- Ascended Fanon:
- Possibly unintentional, but after so much fanart of anime-FNAF both genuinely and as a joke, it's finally in an actual game. You may start screaming.
- "Helpy" was originally a Fan Nickname for the chibi-Funtime Freddy that appeared in Freddy Fazbear's Pizzeria Simulator. This game makes it his official name. Also, though it's been Ascended Fanon since practically the first game, this game is the first to openly use the name "Phone Guy" for that character.
- He Also Did:
- While Joe Gaudet recently became famous because of his roles in UCN, he was the voice actor of Radar in Astroblast back in 2010.
- Ally Johnson (Rockstar Chica) had many roles before UCN, starring as Ava from The Walking Dead, and created DRYVE.
- Madison Brunoehler (Happy Frog) has more than enough experiences with acting before in her web series Madi2TheMax.
- Schedule Slip: Inverted as per the norm for the series; the game was originally going to be released in August 2018, but the release date was pushed forward to June 29th, and then pushed forward again to June 27th. Had Scott not promised not to release the game while Dawko was on holiday, it would've been pushed forward even further to June 22nd.
- What Could Have Been:
- In the early roster, Nightmare Freddy and Trash and the Gang were originally separate characters (Nightmare Freddy being separate from his Freddles and Trash and the Gang being separated into No.1 Crate, Bucket Bob and Mr. Can-Do). Candy Cadet and Adventure Endo-01 were also going to appear in the roster before being replaced by the withered animatronics. Candy Cadet was eventually Demoted to Extra as a decoration in the office that occasionally speaks, but Adventure Endo-01 is completely absent.
- Shown in Scott's Voices.com feedback, some of the actors auditioned as different animatronics before being given their final roles. Zach Hoffman, Eric D. Ward, Matthew Curtis and Darbi Logan (Nightmare Fredbear, Nightmare, Nightmare BB/Music Man and Withered Chica) also auditioned for Nightmarionne before Aleks Le was chosen. Tim Simmons (Nightmare Freddy) and Stephanie Belinda Quinn auditioned for Classic Freddy and Toy Bonnie before being recast, so these two animatronics do not speak.
Trivia / Ultimate Custom Night