Some big games have already been released for backwards compatibility including:

Left 4 Dead Portal 2 Call of Duty: Black Ops Fallout 3 South Park: The Stick of Truth Gears of War 1-3 Mass Effect

In the newest update, Fallout: New Vegas was made available to play on your Xbox One. New Vegas first released in 2010 for the 360. 

To play Fallout: New Vegas, you can purchase it from the Xbox store on your console or web browser, or you can insert your Fallout: New Vegas disk into the Xbox One. Then you will be set to go.

Other games that were made available for backwards compatibility this week are:

Blood Knights Comic Jumper Crystal Quest I Am Alive Joe Danger: Special Edition Red Faction: Battlegrounds Dungeons & Dragons: Chronicles of Mystara

More Xbox 360 titles will be made available for backwards compatibility when the game is ready. Until then, re-live your favorite games from the last generation and pick up those achievements that you couldn’t get the first playthrough.