Raph Koster, CEO of Playable Worlds Inc., is a veteran game designer who has been professionally credited in almost every area of the game industry. He’s been the lead designer and director of massive titles such as Ultima Online and Star Wars Galaxies; a venture-backed entrepreneur heading his own studio; and he’s contributed design work, writing, art, soundtrack music, and programming to many more titles ranging from Facebook games to single-player games for handheld consoles.

Koster is widely recognized as one of the world’s top thinkers about game design, and is an in-demand speaker at conferences all over the world. His book, "A Theory of Fun for Game Design is one of the undisputed classics in the games field and was recently revised for a 10th anniversary edition. In 2012, he was named an Online Game Legend at the Game Developers Conference Online.

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