Connections between Fluxus indeterminacy, collaboration and open-endedness are connected to game art and its creative and sometimes subversive moves. Beginning with Marcel Duchamp’s interest in games and continuing to John Cage’s interest in chance operations along with various Fluxus artist’s conceptions, the author moves through techniques and issues that underpin digital game development and its relation to Fluxus principles. Questions are raised and answered: What is a game? Why game art? Collective action through networks and Open Source strategies are explored. Mods, patches, scores and chance and the ways in which they subvert existing games or integrate the creative capacity of game designer with player are discussed and sometimes shown.