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?
Team Dignitas Team Dignitas is an International e-Sports team which is headquartered in the United Kingdom. It was founded on 9 September 2003 as a fusion of the "Battlefield 1942" clans Legion Condor and Sweden Kompanix and it was acquired by the Philadelphia 76ers in September 2016. While the clan began as a pure Battlefield clan in the beginning, it has since expanded into a wider range of games. In July 2004, Team Dignitas was registered as a company: Team Dignitas Ltd. The Managing Director is Michael "ODEE" O'Dell. Team Dignitas "League of Legends" currently competes in the North American League of Legends Championship Series, having been merged with Apex Gaming under 76ers ownership. The team had previously been relegated from the league by Team Dragon Knights.
4Kings 4Kings or Four Kings was a professional computer game esports clan/team based in the United Kingdom. The team had players competing in "Return to Castle Wolfenstein", "Quake III", "Warcraft III", "Unreal Tournament" and "Counter-Strike". The most famous member of 4Kings is probably "Warcraft III" player Grubby. Philip Wride was a manager of the team.