Video: Game Changer: Zynga revolutionizes social gaming

Publish Date: 01-16-2012 08:58 PM -0800

Social gaming company Zynga is behind popular games such as "Farmville" and "Words With Friends." NBC's Kate Snow traveled to the company's headquarters in San Francisco for a behind-the-scenes look at how Zynga develops games that more than 150 million people play every month. (Rock Center)