Reflection is the mental process that occurs when we encounter situations that cannot be effectively dealt with using previous experiences and solutions. For decades, it has been acknowledged as an important process in learning, and in recent years it has become a central focus of branches of interaction design. Games are highly appropriate vehicles for triggering and supporting reflection, but several of the dominant tropes of conventional game design directly work against reflection. In serious games, the promise of safe environments, the drive to pose problems with clear solutions and a preference for stealth learning complicate how directly we can design for reflection. In mainstream entertainment games, qualities such as immersion and the design traditions of designing for the everyplayer and quantifying motivation again run counter to a reflective agenda. Drawing on the critical and reflective design literature and on case studies of experimental games on the peripheries of mainstream game design, I propose reflective game design, a new alternative design agenda from which to design, deconstruct and make sense of play experiences.