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The Hunter Chopper is a Combine attack helicopter that appears in Half-Life 2, Valve's first-person shooter released in 2004, where it pursues Gordon Freeman through City 17 and the surrounding canals. Its alarm is part of the game's sound design, warning players that the helicopter has spotted them and is about to open fire. Because the siren is short, instantly recognisable to players, and easy to loop, it has been reused in gameplay videos, memes, and edits to signal an incoming threat, keeping it familiar long after the original game.
About this sound
The Hunter Chopper alarm from Half-Life 2, a siren that warns of the Combine helicopter hunting you down. Creators use it for chase scenes and danger alerts.
This is the short, looping alarm that plays when the Hunter Chopper in Half-Life 2 locks onto Gordon Freeman and starts its attack run. It is a sharp, electronic siren with a rising, urgent tone that cuts through gunfire and engine noise, instantly signalling that a powerful enemy helicopter is overhead and closing in. In gameplay it raises tension fast, turning a quiet street or rooftop into a scramble for cover, and in videos it does the same job, telling viewers in under two seconds that danger has arrived and something is about to go wrong.
