yeah MS has 20 I think Sony has 17 I believe
is this list complete?
United States
343 Industries Halo series
Connected Experiences Responsible for cloud service on Xbox, servers and online features
Good Science Studio Kinect Adventures, Kinect Fun Labs
Kids and Lifestyle Entertainment Next generation fitness project - Original IP
Leap Experience Pioneers Unannounced Game - Original IP
Platform Next Studios Unannounced Game - Original IP
Microsoft Studios Mobile Gaming ilomilo
Microsoft Studios Redmond Publishing Overseeing multiple projects in conjunction with development studios based in the Americas
Team Dakota Project Spark
Turn 10 Studios Forza Motorsport series
Twisted Pixel Games The Gunstringer, LocoCycle, 'Splosion Man series
Xbox Entertainment Studios Various interactive television projects
Xbox Live Productions South Park Let's Go Tower Defense Play!, South Park: Tenorman's Revenge, Avatar Kinect
Europe
Lionhead Studios Fable series, Black & White series, Unannounced MMO-like New IP
Lift London Multiple AAA Cloud Based gaming projects (4+)
Microsoft Studios EMEA Publishing Overseeing projects in conjunction with development studios based in Europe, Middle East and Asia
Press Play Max: The Curse of Brotherhood[31]
Rare Ltd. Banjo-Kazooie series, Viva Piñata, Kameo: Elements of Power, Grabbed by the Ghoulies, Kinect Sports
Soho Productions Kinect Sesame Street TV, Upload Studios
Canada
BigPark Joy Ride series, Kinect Sports: Season Two
Black Tusk Studios Gears of War series
http://en.wikipedia.org/wiki/Microsoft_Studios