Narratology is the study of narrative structure and function. It seeks to understand the basic components of stories, how they are arranged and structured, the different media used to tell stories, the various purposes stories serve, and how stories evolve over time and place. The document defines narratology as including narrative arcs, universal causal patterns called narremes that advance the story, and themes that provide meaning beyond just representing events. Narratology is important for game design as it allows games to model storytelling conventions from other media and provide gamers with a narrative to follow through the game.