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!

Other features include.

- Challenge menu, including 16 themed challenges

- From returning favorites and newcomers to the franchise

Voice acting - unlockable office skins

- Unlockable overworld animations

Ultimate Custom Night is a horror game developed and produced by Scott Gogh, a spin-off of the Teddy Bear's Five Nights in the Harem series. The game combines 50 mechanical dolls from the previous game, players must challenge and defeat more mechanical dolls to get a high score.

This game is a collection of 50 mechanical dolls from all parts of the series, the player can set which dolls to add and adjust the difficulty level of each. 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 specific scores to unlock transitions, most of which are in the anime genre.