Microsoft

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Microsoft (マイクロソフト) is a United States-based multinational computer technology corporation that develops, manufactures, licenses, and supports a wide range of software products for computing devices and videogaming hardware.

Founded in 1975 by William Henry Gates III and Paul Allen, it first faced the gaming industry indirectly in 1998 by providing a custom version of Windows CE for the Sega Dreamcast, and became an active party in 2001 when they released the Xbox, a console supposed to challenge the Nintendo Gamecube and the Sony PlayStation 2. They later released the Xbox 360, in 2005, an improved version of the previous console, to survive the challenge against the Nintendo Wii and the Sony PlayStation 3. There is a number of Sonic games for the Xbox and the Xbox 360.

Microsoft also offers the Microsoft Live Arcade service.

Sonic the Hedgehog games for the following systems
	1998  Sonic Adventure     1999  Sonic Adventure International     2000  Sonic Shuffle     2001  Sonic Adventure 2 | Sonic Adventure 2 Birthday Pack | Sega Smash Pack Volume 1      Demos  Sonic Adventure Taikenban | Sonic Adventure 2: The Trial  Prototypes  Sonic Adventure | Sonic Shuffle | Sonic Adventure 2

	2003  Sonic Heroes     2004  Sonic Mega Collection Plus     2005  Shadow the Hedgehog | 2 in 1 Combo Pack: Sonic Heroes/Super Monkey Ball Deluxe | 2 in 1 Combo Pack: Sonic Mega Collection Plus/Super Monkey Ball Deluxe     2006  Sonic Riders      Prototypes  Sonic Heroes (Xbox E3 version)  Unreleased  Sonic Gems Collection | Sonic the Hedgehog Extreme

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2006  Sonic the Hedgehog     2008  Sonic Unleashed     2009  Sonic's Ultimate Genesis Collection     2010  Sonic & Sega All-Stars Racing | Sonic Free Riders     2011  Sonic Generations     2012  Sonic & All-Stars Racing Transformed      Demos  Sonic the Hedgehog (2006 Xbox Live demo) | Sonic Generations (Demo 1/2)  Prototypes  Sonic Unleashed prereleases | Sonic & Sega All-Stars Racing (prototype; 2009-12-01)