Computer games dominate millions of private computer screens. For half a century they have no longer been the exclusive business of laboratories, military advisors and subcultures. Nevertheless, no one has ever posed the most obvious of all questions: why do computer games exist? Computer games (as we know them) came unasked for and cannot be taken for granted, if only for this one simple reason. But what peculiar date and place brought such completely heterogeneous appliances, bodies and symbolisms together to form (long-prepared and yet sudden) this totally new kind of game? What type of knowledge is it that cuts across technologies, institutions and machines striving to shape today’s games? Pias’s archaeology of the computer game is not solely a survey of the numerous objects, apparatus and ensembles which have been crafted, constructed and installed only to reappear one day as commercial products. It is, simultaneously and exceedingly, also an epistemical reconstruction of game playing at and with computers and by computers themselves, an archaeology of the computer game which no longer relies on the individual’s freedom from »his« or »her« game. It is the economies of time, decision and regulation, embodied in hard- and software, that form the materiality of the games in which information societies think their own game.