is xbox one compatible with original xbox games
During Microsoft's E3 2017 press conference on June 11, 2017, Microsoft announced that roughly 50% of Xbox One users had played an Xbox 360 game on Xbox One through the system's backward-compatibility feature. Based on popular demand, Phil Spencer, Microsoft's Head of Xbox, announced that Xbox One consoles would be able to play select games made for the original Xbox console, first released in 2001. The compatibility will work on all consoles in the Xbox One family, including the Xbox One X, and will be available as a free update planned for the fall of 2017.
List of Xbox games compatible with Xbox One