What is a Megagame?
Megagames are a type of game originally created by the London-based group the Megagame Makers. Megagames aren't easily defined because different megagames can vary wildly in scope and functionality. But there are some common themes throughout most megagames that can be used to explain the concept.
As the name implies, megagames require a large number of players - very few megagames have fewer than 20 or so participants, and most have somewhere between 20 and 60 players, although numbers can go up into the hundreds. The games are played "live" in a single venue, and tend to be played with pen & paper/face-to-face experiences rather than involving technology. Megagames often use some written rules and physical components, like a board game, but they are used as a framework - giving economies, armies and other resources a very tangible feel, so that the players' decisions have visible impact. The focus of a megagame is player interaction, with players having to communicate with each other in order to manage information, broker deals and make hard decisions.
Megagames are as challenging to play as they are fun. They bring the imagination and freedom of Roleplaying games, the decision making and satisfying challenge of Board games, and mix it together with a simulation of a big crisis. Together, you have a very exciting day that might also teach you a few things...