Welcome to the ultimate FNaF mashup, where you'll once again be trapped alone in your office, fending off killer electronic animations! With 50 optional e-animated characters spanning seven five-night sessions in Freddy's game, the customization options are virtually endless. Mix and match any kind of character you like, set the difficulty to 0-20, and get right into the action! At your desk, you'll need to manage two side doors, two vents, and two air hoses, all leading directly into your office.

To complete the extreme challenge this time, you'll also need to master other tools, heating, air conditioning, global octavos, generators and other tools. As if all that wasn't enough, you'll also need to set up laser traps in the vents, collect Faz-Coins, buy items from the prize counter, and as always, keep a close eye on not one, but two, Pirate's Cove curtains!

The game's story elements, according to most inferences, this as William Afton (i.e., the man in purple) in the "pizza restaurant simulator" after being destroyed by fire, the soul trapped in a suspected "pizza restaurant" space, constantly killed by their own creation of mechanical dolls and their mutant species. The words of the mechanical dolls reveal that they are emerging because of a "person who should not be killed", while the end screen of the game after being killed by the mechanical dolls will occasionally appear a bizarre child smiling, so it can be inferred that the soul of a child killed by William. And after breaking the highest difficulty, players will see the shaking gold Freddy, prompting most people to deduce that the child is possessed in the gold Freddy girl Cassidy, that she refused to forgive William Afton, so create this space without a real ending to William Afton suffer, want to know what happened next? Join us to explore the mystery of the game!

The game is a collection of 50 mechanical dolls from various parts of the series, players can set their own to join which dolls and adjust the respective difficulty level. The game also prepared a number of challenges for players to play, but also allows players to use props to play. Players need to manipulate doors, surveillance systems and vents, while also paying attention to the surrounding temperature, noise, electricity, pipelines, etc. Players can also choose to properly enable music. Players can also choose to properly enable music boxes, generators, air conditioning, etc.

Each character has a different attack method, so players must use the corresponding method to defend. In addition, a character named "Dee Dee" will also randomly join other characters in the night to increase the difficulty of the night. Players can adjust their difficulty to get high scores, and get a specific score to unlock transitions, most of which are of the anime genre.