What started as a community of video gamers gathering at conventions to play has become a big business.
As eSports grows, media giants such as ESPN and Turner are broadcasting tournaments and competitions.
In 2014, Amazon acquired Twitch, the live streaming platform that continues to be the leader in online gaming broadcasts.
"League of Legends" has spawned a worldwide community called the League of Legends Championship Series, more commonly known as LCS or LOL eSports.