JAY DAUTCHER, MIKE GRIFFIN, TIFFANY ROMAIN and EUGENE LIMB Theories about humans and their relationships with technology are part of a lifeworld shared by many corporate ethnographers, although individuals’ practices for engaging with theory can vary considerably due to factors such as disciplinary training and workplace norms. Within the EPIC community the perception of a constrained relationship between theory and corporate ethnographic praxis has emerged as a matter of concern. This paper recounts our experiment with bringing theory into daily work by designing and playing a game that had us adopt the personas of theorists while engaging in rhetorical combat, competing to surface insights relevant to an ongoing technology development project. Each phase, from initial game design, through prototyping play, to the final event, supported our collective practice of theory, brought to light hidden assumptions about the role of theory in our work, and provided actionable value to our daily work activities....