League of Legends is a free-to-play multiplayer online battle arena, real-time strategy video game developed and published by Riot Games for Microsoft Windows and OS X. Wikipedia. Initial release date: October 27, 2009. Developer: Riot Games. Genre: Multiplayer online battle arena. Mode: Multiplayer video game. Publisher: Riot Games. Designers: Steve Feak, Colt 'Ezreal' Hallam, Tom Cadwell, Rob Garrett, Christina Norman. Follow on:. Facebook:.