League of Legends (abbreviated LoL or League) is a 2009 multiplayer online battle arena video game developed and published by Riot Games. League of Legends is often cited as the world’s largest esport, with an international competitive scene. The 2019 League of Legends World Championship had over 100 million unique viewers, peaking at a concurrent viewership of 44 million, with a minimum prize pool of US$2.5 million.

In League of Legends, players form a team of five and assume the role of a champion, characters with unique abilities, generally varying around a type of class, and battle against a team of player- or computer-controlled champions. In the main game mode, Summoner’s Rift, the goal is to destroy the opposing team’s Nexus, a structure that lies at the heart of their base and is protected by defensive structures.