Question: are all xbox 360 games backwards compatible with xbox one

Answer: No, Not all Xbox 360 games will be supported; 104 Xbox 360 games were available for the feature's public launch on November 12, 2015 with Xbox One preview program members getting early access. Microsoft stated that publishers will only need to provide permission to the company to allow the repackaging, and they expect the list to grow significantly over time. Unlike the emulation of original Xbox games on the Xbox 360, the Xbox One does not require game modification, since it emulates an exact replica of its predecessor's environment -- both hardware and software operating systems. The downloaded game is a repackaged version of the original that identifies itself as an Xbox One title to the console. At Gamescom, Microsoft revealed it has plans to ensure ``all future Xbox 360 Games with Gold titles will be playable on Xbox One.'' On December 17, 2015 Microsoft made another sixteen Xbox 360 games compatible with Xbox One, including titles such as Halo: Reach, Fable III and Deus Ex: Human Revolution. On January 21, 2016, Microsoft made another ten Xbox 360 games compatible, including The Witcher 2: Assassins of Kings and Counter-Strike: Global Offensive. On May 13, 2016, Microsoft made Xbox 360 titles with multiple discs compatible, starting with Deus Ex: Human Revolution Director's Cut.