Any observer of games will note that they tend to cluster into recognized styles, such as the first-person shooter (FPS), the real-time strategy game (RTS), the massively multiplayer online game (MMOG), and the platformer. A priori, the natural assumption is that these are similar to the sorts of genres with which we are familiar in other media: science fiction, the film musical, and so on. Yet game styles are defined by modalities of play, rather than thematic elements; perhaps they should be viewed as quite different from conventional notions of genre.Conventionally, genres are viewed as arising out of cultural conditions that make certain themes compelling to contemporaries. This paper argues that game styles, by contrast, arise from the...