Backward compatibility
Backward compatibility on the Xbox 360 is achieved through software emulation of the original Xbox. Emulated games are rendered in 720p, 1080i, or 1080p HD resolution with anti-aliasing enabled rather than the Xbox standard of 480p(anti-aliasing is also applied when the output resolution is 480p.) However there are also games that do not perform well in emulation; these often exhibit a lower framerate on the Xbox 360,as well as various sound bugs and occasional gameplay glitches. A hard drive and the downloading of an emulation profile is needed in order to play original Xbox games. Updated emulation profiles are automatically obtained through Xbox Live, or alternatively they can be burned to a CD with files downloaded from Xbox.com, or by ordering a free update disc from Microsoft. A full list of backward-compatible games is maintained at Xbox.com.The current U.S. list includes 464 games as of the November 2007 update; fewer titles are backward compatible in European and Japanese markets, with 295 and 101 titles respectively. Microsoft originally stated that they intend to release more emulation profiles as they become available, with a goal of making the entire Xbox library playable on the Xbox 360. They have since made multiple statements indicating that this may never be complete though the rate of updates to the backwards compatibility list still continues steadily.At 2008’s CES, Albert Penello, the Xbox 360’s group marketing manager, said that “engineering work around bringing out new titles” is “winding down”