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.
Xbox One
With Perreault's success, Microsoft announced the Xbox backwards compatibility on the Xbox One in June 2017. Thirteen titles were initially released on October 24, 2017. Microsoft announced an additional 19 titles to be added to the Xbox One service during April 2018.