An International e-Sports team which is headquartered in the United Kingdom competes  in what developed and published by Riot Games for Microsoft Windows and macOS?
League of Legends League of Legends (abbreviated LoL) is a multiplayer online battle arena video game developed and published by Riot Games for Microsoft Windows and macOS. The game follows a freemium model and is supported by microtransactions, and was inspired by the "" mod, "Defense of the Ancients".
OpenBet OpenBet is a sportsbook and gaming software company based in Chiswick, London in the United Kingdom, with offices in Athens,Greece, Sydney, Australia and Montreal, Canada. It supplies bookmakers, national lotteries and other government-backed betting organisations in regulated markets.