At its barest, a megagame is a game played by dozens of people (or more!), in person, in real time. Equal parts board game and role-playing game, a megagame is much more than the sum of its parts. It's an enormous, immersive story guided by the players' choices, where anything is possible, even replacing the pope with an alien or nuking Antarctica. New York based MegaGame Society (and friends!) will talk about the origins of megagames, what's happening now, and plans for the future.