Harrison’s quiet departure marks a muted end to his time at the search giant. He joined the company in January 2018, and while he didn’t specify what he was working on at the time, it was easy to guess that he was probably doing something with gaming: Harrison worked at Sony Computer Entertainment (now Sony Interactive Entertainment) for 15 years, was on the advisory board for the cloud gaming service Gaikai, and led Microsoft’s Xbox and Interactive Entertainment business in Europe from 2012 to 2015. And lo…