Zynga CEO Mark Pincus speaks during the Zynga Unleashed event at the company’s headquarters in San Francisco, California October 11, 2011. Social games company Zynga is betting an entirely new slate of games based on bingo, casinos and hidden objects will draw in fresh players as rivals circle its dominant position in games on Facebook. REUTERS/Stephen Lam (UNITED STATES – Tags: BUSINESS SCIENCE TECHNOLOGY)