This creaking door comes from Valve's Half-Life, the 1998 shooter whose GoldSrc engine also powered Counter-Strike, which is why the tag list mentions CS. Door sounds like this were everyday map audio, but editors later lifted them for memes, pairing plain creaks with door memes like FBI open up or Counter-Strike callouts such as bomb has been planted. Because the clip is under a second long, it works as a clean transition effect, and its retro game texture keeps it popular with gaming editors today.