Mattrick spent six years at Microsoft; the last three years saw Mattrick take the position of Microsoft's president of the Interactive Entertainment Business. Within that timeframe, Mattrick was responsible for increasing the Xbox 360's globally installed base by 700 per cent to more than 75 million consoles. Mattrick also oversaw consumer-based businesses and products, which included the Kinect entertainment products, and PC and mobile interactive entertainment. "In its short history, Zynga has defined entertainment and brought social gaming to the mainstream," Mattrick says. "I joined Zynga because I believe that Mark's pioneering vision and mission to connect the world through games is just getting started. Zynga is a great business that has yet to realize its full potential." On May 21, Mattrick was blessed with the honour of christening the Xbox One. He was also present at Microsoft's Xbox One E3 press conference in June.