A megagame is a large-scale game with elements of board gaming, role playing and conflict gaming, with a number of players from around 10 up to a hundred. The scenario of the game is placed in eastern Sweden and the participants play various local, regional and national roles. During the game, climate change will be simulated for the period 2020 to 2100, based on forecasts from the Swedish Meteorological and Hydrological Institute (SMHI). The consequences of the changed climate will present the participants with difficult choices. The goals of the players may conflict with political decisions taken in Stockholm and in Brussels. The objectives of the research project are: • to develop a game that creates awareness of how serious climate change is, and how it affects us • to develop a university course in which students develop, organise and participate in a megagame • to study the behaviour of those playing the game with respect to communication, decision-making and conflict management