Biohazard is the Japanese name for the Resident Evil series, and this clip comes from its Nintendo DS title screen, where a voice announces the game as it loads. Short title-screen sounds like this have long circulated among Resident Evil fans, who rip and share them for edits, streams and fan videos. Its appeal is partly nostalgia for handheld horror and partly practical: at just over four seconds, it works as a quick, recognisable opener that immediately tells viewers which franchise a video is about.