League of Legends Champions Korea (LCK) is the primary competition for League of Legends esports in South Korea. Contested by ten teams, the league runs two seasons per year and serves as a direct route to qualification for the annual League of Legends World Championship. The LCK is administered in cooperation between Riot Games and KeSPA.

League of Legends (LoL), commonly referred to as League, is a 2009 multiplayer online battle arena video game developed and published by Riot Games. Inspired by Defense of the Ancients, a custom map for Warcraft III, Riot's founders sought to develop a stand-alone game in the same genre. Since its release in October 2009, League has been free-to-play and is monetized through purchasable character customization. The game is available for Microsoft Windows and macOS.