Microsoft has been talking about giving its Xbox One backward compatibility, or the ability to play games from its older Xbox 360 console, for months—but today’s the day the feature finally becomes available.

That means if you were an Xbox 360 fan whose old console has been gathering dust since upgrading to the new Xbox One, you can play at least some of your old games on your new hardware. Microsoft has a list of about 100 games that are compatible as of today, including Halo: Reach, Call of Duty: Black Ops 2, and Fallout 3. Probably best of all, if you get the Xbox One Gears of War: Ultimate Edition and play it, you’ll also get the rest of the Gears of War catalogue on Xbox One at no extra cost.

Backward compatibility comes as part of a bigger update to the entire Xbox One dashboard, which Microsoft is calling the “New Xbox One Experience.” The gist of it: the interface is vertical now instead of horizontal. So that’s nice. There are a host of other little fixes, optimizations, and changes, with full list here. But definitely the best selling point for an Xbox One this year is the ability to finally consider getting rid of your Xbox 360.