League of Legends is a multiplayer online battle arena video game launched in 2007. In 2014, Twitch, a live streaming platform for gaming, was purchased by Amazon for $970 million and had over 100 million unique viewers. Professional esports for League of Legends and other games draw large crowds, with the League of Legends World Championship Season 3 finals selling out the KeyArena in Seattle. Major brands like Coca-Cola, Red Bull, and American Express have partnered with League of Legends developer Riot Games through sponsoring tournaments and collaborations.