This clip comes from the Half-Life sound library, the first-person shooter that popularised atmospheric, industrial sound design in the late 1990s. Creaking doors became a shorthand for the game's abandoned research facilities, and players later ripped and shared individual effects on soundboards for Counter-Strike and other mods. Because the squeak is short, clean and instantly recognisable as a closing door, editors still reuse it today for horror videos, game memes and haunted house edits, long after the original game.