League of Legends is a beast. An unassailable success that every other games developer or publisher is trying to figure out. Based on hours of play, it's the most played video game in the world, notching upwards of 1 billion hours logged every month. Millions of people jump online every day to battle it out in Riot Games' hit multiplayer title. And League of Legends' annual tournament doled out a cool million in cash this summer, after a championship round that 8 million viewers tuned in for.