PC game League of Legends is an amazing success. Developer Riot Games revealed that the game has over 70 million registered users, 32 million monthly players, and 12 million daily players.
They claim it is the most played video game in the world right now, and they certainly have some impressive stats to back that up.
For reference, nearly three times as many people play League of Legends each month than World of Warcraft at the height of it's popularity. Nearly four times as many people play the game every day than daily players of Modern Warfare 3.