DotA 2, League of Legends, Heroes of the Storm, or even SMITE -- there are several great MOBA games with thriving eSports scenes. I've picked DotA 2, I'm sure to the chagrin of many. DotA was the original MOBA, and it deserves some credit for that. It also is arguably more complex than other titles due to the way certain heroes scale differently than others, the ability to deny creeps, and the ability to use teleport scrolls to reach other towers. DotA also tends to have a higher technical ceiling, which can make it harder to master. It wouldn't be the Olympics if the best players weren't featured competing in the toughest of the MOBAs.