Toward a Theory of Play: A Logical Perspective on Games and Interaction Johan van Benthem, Eric Pacuit, Olivier Roy Abstract: The combination of logic and game theory provides a fine-grained perspective on information and interaction dynamics, a 'Theory of Play'. In this paper we lay down the main components of such a theory, drawing on recent advances in the logical dynamics of actions, preferences, and information. We then show how this fine-grained perspective has already shed new light on the long-term dynamics of information exchange, as well as on the much-discussed question of extensive game rationality.