The Hunter Chopper is a Combine attack helicopter in Half-Life 2, Valve's 2004 first-person shooter and sequel to the original Half-Life. It patrols the skies around City 17 and the canals, hunting the player with rotor wash, searchlights and mounted guns, and its mechanical rotor sound became one of the game's most recognisable audio cues. Fans later lifted short clips like this one for soundboards, gameplay edits and meme videos, where the sound still works as shorthand for an incoming aerial threat, even for viewers who have never played the game.