I wasn't sure it was League of Legends, but now upon searching again on Google, every trusted source can confirm this is the most played game worldwide, and it's understandable why... it's an easy and straightforward game, it doesn't require an advanced computer to be capable of running it, and it's overall noob-friendly in the beginning. They've really managed to make the most out of its potential since they launched this game in 2009! Good job to them for creating a recognizable brand out of a not-so-new concept.