The Demogorgon is the predatory creature introduced in the first season of Stranger Things, released in 2016. The young characters name it after a monster from Dungeons & Dragons, using the game as a reference for the unfamiliar threat. Its distinctive creature noises became part of the series’ horror identity and later circulated through fan edits, gaming videos, reaction clips, and soundboards. The effect remains recognizable because it quickly communicates supernatural danger, even when used outside scenes connected to the Upside Down.