League of Legends
GamesDefinition
League of Legends is Riot Games' 5v5 MOBA, launched in 2009. It is the largest MOBA in the West and the second-largest globally after Dota 2. League's roles (Top, Jungle, Mid, ADC, Support) and competitive ecosystem (LCS, LEC, LCK, LPL, Worlds) shape MOBA culture. Riot's matchmaking, ranked system, and player-behavior research are case studies for the industry.
Example
"League is my main game — climbing from Plat to Diamond this split." The player's primary title is the MOBA.