Microsoft Game Studios - In-house studios

* ACES Game Studio: Flight Simulator series, Combat Flight Simulator series and the upcoming Train Simulator 2
* Carbonated Games: Hexic, 7 Hand Poker, UNO, Aegis Wing
* Ensemble: Age of Empires series, Age of Mythology series, Halo Wars
* Hired Gun: Halo 2 for Windows Vista
* Lionhead: Black & White series, The Movies, Fable series
* Rare: Perfect Dark series, Kameo, Conker series, Banjo series, Viva Piñata
* Turn 10: Forza Motorsport series
* Wingnut Interactive: A new studio set up in conjunction with Peter Jackson (they will be producing alongside with Bungie Studios a new game based in the Halo universe)
* Massive Inc.: A studio primarily set up for in game advertising.

除了这些叫得出名的，MGS大楼里还养了不少闲杂人等……

下面是烟消云散的美好回忆：
Former studios

* Bungie: Became an independent studio on October 1, 2007
* Digital Anvil: Dissolved on January 31, 2006.
* Indie Built: Sold off to Take 2 in October, 2004.
* FASA Interactive: The studio was closed on September 12, 2007.

理性不过3页么……