News Corp. (NWS, News, Press Releases: 18.40 +0.17 +0.93%, yield: 0.74, cap: N/A, 1yr target: 0.00) has acquired Irata Labs , a San Francisco social games developer that builds games and other applications for social networks such as Twitter and Facebook. Irata is best known for creating Spymaster, an espionage game that lets players use [...]