Raph Koster has spent more than three decades shaping the way we think about games, virtual worlds, and player behavior. As the lead designer of Ultima Online and creative director of Star Wars Galaxies, he helped define the MMORPG genre and pioneered many of the systems that still influence game design today. He is also the author of the industry-defining book A Theory of Fun for Game Design, a work that has shaped generations of developers. Today, through Playable Worlds, Raph continues exploring how online worlds can become deeper, more meaningful, and more sustainable for the players who inhabit them.In this conversation, recorded in-studio at Off Base, Greg and Raph dive into the fundamentals of great game design—why games are fundamentally about  ...