Killtastrophe comes from Halo Reach, released in 2010 as the prequel to the original Halo trilogy, developed by Bungie. It is part of the long running multi kill medal system voiced by announcer Jeff Steitzer, whose lines have defined Halo multiplayer since 2001. Earning it requires eight opponents to fall within seconds of each other, making it rarer than Killtacular or Killtrocity. Clips of the call spread through early YouTube montages and forums, and it remains a shorthand for overwhelming skill in shooters.