According to The Daily Dot, Riot Games raked in $1.6 billion dollars last year alone thanks to League of Legends. The dollar figure came via a SuperData Research report that combines digital sales data from publisher, developers and payment providers and pairs it with "qualitative consumer insight".
By comparison, Valve's Dota 2 earned $238 million, certainly nothing to sneeze at, but a distant second to LoL in the MOBA genre. Other games outside the battle arena game type where LoL is king included:
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What about you? Have you contributed to the astounding success of League of Legends? Let us know in the comments.