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 obtain a high score.

Welcome to the ultimate FNaF mashup, where you'll once again be trapped alone in your office against killer electronic animation! With 50 optional electronic animation characters spanning seven five-night periods 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