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The 2015 NA LCS season was the third year of the North American League of Legends Championship Series. It saw an expansion of the league from eight to ten teams, as well as the introduction of championship points and the regional finals gauntlet to better determine which teams should qualify for the World Championship. The season was divided into spring and summer splits, each consisting of a regular season and playoff stage. The top six teams from the regular season advanced to the playoff stage, with the top two teams receiving a bye to the semifinals. Regular season games and the spring playoffs were played in the Riot Games Studios in Los Angeles, California, while the summer finals were held at Madison Square Garden.
The three teams that qualified for the 2015 World Championship were Counter Logic Gaming (summer champions), Team SoloMid (most championship points) and Cloud9 (regional finals winner).