Xbox
Released in 2001, the Xbox control pad was the first controller made for the original Xbox. The Xbox controller features two analog sticks, a pressure-sensitive directional pad, two analog triggers, a Back button, a Start button, two accessory slots and six 8-bit analog action buttons (A/Green, B/Red, X/Blue, Y/Yellow, and Black and White buttons). The standard Xbox controller (originally nicknamed the "Fatty" and later the "Duke") was originally the controller bundled with Xbox systems for all territories except Japan.
List of Xbox games compatible with Xbox 360
Microsoft launched the "Xbox Originals" program in December 2007 where Xbox 360 owners could purchase select original Xbox titles digitally if they did not own a game disc and could be found inside their own section in the Xbox Live Marketplace. Beginning in June 2009 the branding was phased out and the games were moved to the "Games on Demand" section of the store while Microsoft stating that they have "finished it's portfolio" of Xbox Originals.