*The Global Cyber Game* This report presents a synthesis of the findings of the Defence Academy Cyber Inquiry. The Inquiry was an open source research programme formed in response to a strategic research question posed by the Ministry of Defence. The report gives an overview of the Cyber Inquiry's big-picture conclusions. http://www.da.mod.uk/publications/library/technology/20130508-Cyber_report_f... *Executive Summary*: This report presents a systematic way of thinking about cyberpower and its use by a variety of global players. The urgency of addressing cyberpower in this way is a consequence of the very high value of the Internet and the hazards of its current militarization. Cyberpower and cyber security are conceptualized as a ?'Global Game?' with a novel ?'Cyber Gameboard?' consisting of a nine-cell grid. The horizontal direction on the grid is divided into three columns representing aspects of information (i.e. cyber): connection, computation and cognition. The vertical direction on the grid is divided into three rows representing types of power: coercion, co-option, and cooperation. The nine cells of the grid represent all the possible combinations of power and information, that is, forms of cyberpower. The Cyber Gameboard itself is also an abstract representation of the surface of cyberspace, or C-space as defined in this report. C-space is understood as a networked medium capable of conveying various combinations of power and information to produce effects in physical or ?'flow space?,' referred to as F-space in this report. Game play is understood as the projection via C-space of a cyberpower capability existing in any one cell of the gameboard to produce an effect in F-space vis-a-vis another player in any other cell of the gameboard. By default, the Cyber Game is played either actively or passively by all those using network connected computers. The players include states, businesses, NGOs, individuals, non-state political groups, and organized crime, among others. Each player is seen as having a certain level of cyberpower when its capability in each cell is summed across the whole board. In general states have the most cyberpower. The possible future path of the game is depicted by two scenarios, /N-topia/ and /N-crash/. These are the stakes for which the Cyber Game is played. /N-topia/ represents the upside potential of the game, in which the full value of a globally connected knowledge society is realized. /N-crash/ represents the downside potential, in which militarization and fragmentation of the Internet cause its value to be substantially destroyed. Which scenario eventuates will be determined largely by the overall pattern of play of the Cyber Game. States have a high level of responsibility for determining the outcome. The current pattern of play is beginning to resemble traditional state-on-state geopolitical conflict. This puts the civil Internet at risk, and civilian cyber players are already getting caught in the crossfire. As long as the civil Internet remains undefended and easily permeable to cyber attack it will be hard to achieve the /N-topia/ scenario. Defending the civil Internet in depth, and hardening it by re-architecting will allow its full social and economic value to be realized but will restrict the potential for espionage and surveillance by states. This trade-off is net positive and in accordance with the espoused values of Western-style democracies. It does however call for leadership based on enlightened self-interest by state players.