Extermination comes from Halo multiplayer, where the in-game announcer awards the medal when a single player eliminates the entire enemy team before anyone respawns. The callout became familiar to players through repeated matches and was later lifted into gameplay montages, kill compilations and streaming highlights shared online. Because it marks a rare, clean sweep rather than an ordinary kill, it still works as shorthand for total dominance in a round. Fans recognise the voice instantly, even outside Halo, and reuse it to crown the decisive moment in a clip.