: The update added several new options for players to test their skills:

The file you are referring to is likely related to the Five Nights at Freddy's 4: Halloween Edition content update released by Scott Cawthon on . It introduced significant visual and gameplay additions to the original Five Nights at Freddy's 4 . Halloween Edition Key Features

: Blind Mode, Mad Freddy, Insta-Foxy, and All Nightmare mode. Cheats : House Map and Fast Nights.