Ultimate Custom Night is a free-to-play horror puzzle game with a first-person view in the Five Nights at Freddy's universe. You have to confront 50 different animatronics that you need to track down and use everything you can: a generator, ventilation, heater, music box and many other things. The complexity of animatronics, as before, is set on a scale from 1 to 20. The higher the value, the angrier the character. At the same time, you can choose from all the characters from the previous parts, as well as from many new ones. In addition, there are 16 different challenges, different office options that can be purchased with coins, and small story cutscenes that are also available for purchase.