A megagame plays out much like a model UN with a larger focus on military and covert operations simulated by the control team. Teams compete for scarce resources and information, using whatever limited funds and abilities they have at their disposal, all while pursuing the larger goals laid out by the megagame in question. The most well-known megagame today is Watch the Skies!, a near-future simulation where the earth’s governments must react to and prepare for the appearance of extraterrestrials whose motivations and abilities are unknown.

The term “megagame” was coined around 1980 by Andy Callan, an innovative wargamer and historian; he was also a founding member of Wargame Developments. The concept of the megagame was then adapted by the famous military historian, and co-founder of Wargame Developments–author, publisher, wargamer, and TV personality, Paddy Griffith. Paddy organized the first megagames; the first players included many of the people who currently make up Megagame Makers. Together, those early players learned a great deal from those initial games with Paddy.