Killtrocity is part of Halo's long-running multi-kill medal system, voiced by announcer Jeff Steitzer, whose lines have defined the series since Halo: Combat Evolved in 2001. Halo Reach, released in 2010, kept the escalating chain from Double Kill through to Killpocalypse, with Killtrocity sitting at six kills. Online, the clip spread through montage culture and soundboards alongside other shooter callouts like Enemy Spotted and bomb has been planted, becoming shorthand for a dominant play even outside Halo videos.