The Combine Overwatch is the broadcast system used by the Combine, the alien regime occupying Earth in Valve's Half-Life 2, released in 2004. Its announcements, voiced through loudspeakers across City 17, relay orders, warnings and propaganda to citizens under Combine control. Clips from these broadcasts circulated among Half-Life fans and later became popular in gaming videos and memes, where the flat, institutional tone is used to parody authority, surveillance and dystopian bureaucracy. The sound remains recognisable because it immediately evokes the game's oppressive atmosphere.