Lou Castle once founded the legendary Westwood Studios, and had worked with EA for a while on games like Boom Blox before moving on to browser-based gaming service InstantAction. Now that that service has shut its doors, what's a developer with an extensive game design background and experience in social and browser gaming to do? Go to Zynga, of course. Castle has joined the company as a VP of Studios, and will presumably oversee the various development studios at the social giant.

Castle says that InstantAction was on its way to turning itself around, and would have done so in "another six months or so," but that the cost of the operation was too much. Castle says InstantAction wanted to "bridge downloadable and browser-based games," and that "it's understandable that it took a lot of time and energy, but it's also understandable when someone is writing a lot of burn money every month and they don't want to do it anymore."

This article was originally published on Joystiq.

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