Raph Koster is the CEO of Playable Worlds, Inc. He is a veteran game designer and creative executive who has worked at EA, Sony, and Disney as well as run his own company twice. The lead designer and director of massive titles such as Ultima Online and Star Wars Galaxies, he’s also contributed writing, art, music, and programming to many other titles. He is the author of the classic book A Theory of Fun for Game Design. In 2012, he was named an Online Game Legend at the Game Developers Conference Online.