In this fireside chat, Game Developer senior editor Bryant Francis interviews Raph Koster, CEO of Playable Worlds, Inc. who has worked at EA, Sony, and Disney, and served as lead designer and director for titles like Ultima Online and Star Wars Galaxies. They discuss his career as a top game designer, what’s changed in the field since he wrote his classic book A Theory of Fun for Game Design, and what it’s like to have run his own company twice.