Last year's "focus," if you can assign such a thing to the Game Developers' Conference, was probably Zynga and its Facebook games, but for 2011, there was one company that kept getting brought up in the hallways and various panels in San Francisco: Riot Games. Not only did the makers of free-to-play MOBA League of Legends clean up at last year's GDC Online awards, but last week, the Riot booth was constantly surrounded with developers, all wanting to get in on one of the quickest-growing companies around.

Riot CEO Marc Merrill kindly sat down to chat with Joystiq about the game and the company, and we talked about the recent acqusition by Chinese giant Tencent, why Riot is growing so fast, and what's next for the game affectionately dubbed LoL. And yes, LoL players, we asked about Magma Chamber and the Mac client.