Microsoft has added three new games to Xbox One backward compatibility.
The original Assassin's Creed, Codemasters racer GRID 2 and jetpack shooter Dark Void are all now available on the service, arriving shortly after last week's additions Alan Wake, Pac-Man and Castlevania: Symphony of the Night. Halo Wars, which was also added to the service last week, remains exclusively available to Xbox One preview members.
Both digital and disc versions are compatible, so if you have the original Xbox 360 disc pop it into your Xbox One to get the game downloading. Alternatively, if you own any of them digitally, head to the Ready To Install section of My Games & Apps to install them.