(November 2, 2015, 9:34 AM EST) -- SAN FRANCISCO — A federal judge in California on Oct. 28 granted preliminary approval of a $23 million securities class action settlement between shareholders and online video game maker Zynga Inc. and certain of its executive officers and directors (In re Zynga Inc. Securities Litigation, No. 12-4007, N.D. Calif.; 2015 U.S. Dist. LEXIS 145728)....