While any game that has a clear winner or loser can be dubbed an e-sport, several titles dominate the market.
It is a fast-paced, competitive online game that blends the speed and intensity of an RTS with RPG elements. Two teams of powerful champions, each with a unique design and playstyle, battle head-to-head across multiple battlefields and game modes. At the 2017 Season World Championship, 24 teams were invited to play for a prize pool of $4,596,591.
It is a first-person shooter video game. Starting out in 2003, it first focused on games set in World War II, but over time, the series has seen games set in modern times, the midst of the Cold War, futuristic worlds, and outer space. The World League of this game hosts monthly events, which culminate in the World League Championships, in which 32 teams compete for a prize pool of $1.5 million.
It is a MOBA game in which two teams of five unique hero characters try to destroy the enemy's ancient structure inside the enemy base. Valve Corporation hosts an annual tournament called The International where the world's best players compete for prizes. The International 2017 broke the record for the largest prize pool in e-sports history at $24,787,916.
Other top e-sports games include Counter-Strike: Global Offensive, Overwatch, Heroes Of The Storm, and Starcraft.