Major Nelson has dropped a couple more backward compatibility tidbits on Twitter this week. The original Prey from 2006 and Mafia II have been added to the program and are now playable on Xbox One.
This update brings the total Backward Compatible games playable on Xbox One to 473. You can check out the list of all 473 Backward Compatible Xbox & Xbox 360 games here.
If you already own the games digitally they should show up in the “Ready to Install” section on your Xbox One. If you own them on disc simply insert it into your Xbox One and the console will download the title.