Blizzard Entertainment's online collectible card game Hearthstone became played professionally quickly after its release in March 2014. The game is played as an esport, with high-level tournaments such as Blizzard's official World Championship featuring prize pool of up to $1 million,[1] and livestreamers can earn money streaming gameplay on Twitch.
- ^ Changes Coming to Hearthstone Competitive Tour for 2017 Hearthpwn, Retrieved October 26, 2016