Backwards compatibility for the current generation of consoles had been a lost cause, and those with large libraries of Xbox 36 and PS3 games had accepted that old software would remain just that. When backwards compatibility actually hit the Xbox One a few months after the announcement it was a pretty limited service. We had a smattering of first-party titles, some games from the arcade, and a very long wish list. It isn't the first Call of Duty game to make it's way to backwards compatibility, but it's been one of the most requested titles since the beginning. The inclusion of the game in Xbox live's big sale is just gravy.

Source: Forbes April 11, 2017 19:07 UTC