Killtrocity comes from Halo Reach, the 2010 first person shooter developed by Bungie for Xbox 360. In the Halo series the multiplayer announcer, voiced by Jeff Steitzer, calls out medal names as players chain kills together within a short time window. Killtrocity is the medal for six such kills, following Double Kill, Triple Kill, Overkill and Killtacular. Clips of the call later spread through gameplay videos, montages and soundboards, where the distinctive delivery became shorthand for a dominant streak even outside Halo matches and competitive play communities online today.