Pentakill is a term from League of Legends, the multiplayer online battle arena game released by Riot Games in 2009, where it describes one player killing all five members of the opposing team within a short window. The game marks each multi-kill with a distinct announcer call, with Pentakill as the rarest and most celebrated in a standard match. Clips of the call spread through gameplay montages, streams and highlight reels, where it became shorthand for a perfect team fight. It remains popular because it instantly communicates a high-skill moment without needing any explanation.