Don Mattrick, Zynga's current CEO, will depart the company immediately after less than two years on the job. He had previously run Microsoft's Xbox business.
In 2010, Don Mattrick held negotiations about buying Zynga with the man he has now replaced, Mark Pincus.
The Xbox executive faces a Herculean task of tossing the social-gaming company a lifeline, and risks getting dragged down himself.
The gaming company cuts outlook after its says revamps of hit games, including Words With Friends, will take longer. But, it says, new efforts should prove fruitful.
Regina Dugan, currently vice president of engineering and leader of Google's Advanced Technology and Projects, shows interest in video games.
Microsoft dedicated its Xbox One press conference to assuring players that it's not the company that trotted out a controversial console last year. This time, games come first.
Commentary: By unbundling the Kinect sensor from Xbox One, Microsoft strips away the console's last differentiating element. The industry and gamers will suffer for it.
The founder and former CEO of the social games company has relinquished all responsibilities as chief product officer, signaling the end of Pincus' operational role at Zynga.
In advance of this week's big developer confab, Microsoft also appoints Nokia chief Stephen Elop, who figured as a possible CEO candidate, as head of its device group.
In a push to cut costs, become more efficient, and tread into the mobile market, the beleaguered game maker reveals some big changes with its earnings report.