So the Dota 2 International 2015 was the biggest eSport prize pool ever ( $18,429,613.05 ) and it was just surpassed yesterday by the same game Dota 2, tournament International 2016. The prize pool will rise even more as the actual tournament dates come near. The current standing of the International 2016 is $18,742,120.
It is by far THE LARGEST eSPORTS PRIZE POOL EVER!!