News Summary: Zynga rolls out new games, features

LET THE GOOD TIMES ROLL: Web game maker Zynga previewed some of its new games and unveiled a network designed to ensure its players have access to the same features whether they are competing on Facebook, mobile devices or the company's own website.

GLUM INVESTORS: Zynga's stock has been slumping because investors have become more skeptical about the company's long-term prospects.

WORRIES PERSIST: The vision that Zynga CEO Mark Pincus offered Tuesday didn't reassure Wall Street. Zynga Inc. shares fell nearly 5 percent to close at $5.77. That's well below Zynga's initial public offering price of $10 six months ago.