The world of professional online gaming has become a multi-billion dollar industry in the past few years. From "Counter-Strike" to "League of Legends" to "Fortnite" and numerous others, millions of fans root on their favorite players from around the world as they make their way through big-money tournaments.

Here are a few platforms to watch your favorite e-sport tournaments. While most platforms carry the most popular games, they also each have exclusive content.

Twitch

Currently, a wide variety of game content is available on Twitch. The platform covers the most important, most played and most-watched games around the globe.

Find it: https://www.twitch.tv/directory/esports

YouTube Gaming

This platform allows a space in which players offer their gameplay in a live format. Fans can join the already 9 million views of "Fortnite" content along with "Call of Duty" and "Minecraft" tutorials.

Find it: https://www.youtube.com/gaming/

Mixer

Along with producing titles for both PC and Xbox One, the Mixer platform allows observers to get real-time interaction with The Content Creators. Mixer is targeted to online players with features like Mixplay which allows interactions directly with the game that is streaming.

Find it: https://mixer.com/

Steam TV

From the company that developed "Counter-Strike: Global Offensive" and "Dota 2," Steam has created a platform for its community of players to perform screenplays and share game content. Steam TV focuses on communication between the content creator and viewers, but also has covered esports tournaments.

Find it: https://store.steampowered.com/app/353380/Steam_Link/