The common artistic medium of aesthetic striving games—the technical resources by which the game designer sculpts practical experience—are the goals, the rules, and the environment that these various parts animate into a system of constraints. The game designer crafts for players a very particular form of struggle, and does so by crafting both a temporary practical agency for us to inhabit and a practical environment for us to struggle against. In other words, the medium of the game designer is agency. If you want a slogan, try this one: games are the art of agency.
