Microsoft has clarified the details of an initiative first introduced a few weeks back, naming the games that qualify for the “upgrade” program taking effect when the Xbox One releases on November 22.

Through this program, players will be able to trade particular Xbox 360 games for the Xbox One versions, adding just another $10 to get the newer versions. Amazon and Best Buy are already on board, and GameStop is offering a similar initiative as well.

These titles include: Battlefield 4, Madden NFL 25, Need For Speed: Rivals, Call of Duty: Ghosts, NBA 2K14, FIFA 14 and Assassin’s Creed IV: Black Flag. Watch Dogs has also been listed by Amazon and Best Buy, but not confirmed by Microsoft just yet.

The deal will go through December 31, so if you want to upgrade, prepare to do it quickly.

Source: MCV