League of Legends (LoL) is a multiplayer online battle arena (MOBA) video game. It was developed and published by Riot Games, who initially released it in June 2011, as the "official" LoL game, but changed its name to League of Legends in August 2014. The game features two teams of five players each, who fight against one another in large 1v1 duels. There are also four champions (heroes) that can be played, each with unique attributes and abilities. The champions are chosen from a pool of over 120 possible units, collectively known as "champion skins".
Unlike traditional sports, in which athletes need to prepare themselves physically, LoL champions need to prepare their talents for battle. All champion skins follow a theme, which players often take inspiration from by cosplaying (dressing up as) their champions, while the skills and spells that each champion has can be practiced and refined via practice matches and ladder matches.