Four more Xbox 360-era Halo games are available to play on Xbox One now, as Microsoft today added a handful of titles to the growing backwards compatibility list. Previously, they were playable only as part of Halo: The Master Chief Collection.

The latest additions to the program are Halo 4, Halo: Combat Evolved Anniversary, Halo 3 ODST Campaign Edition, and Halo 3. They’re listed at the top of the current list, which periodically expands as Microsoft enables support for additional games.

The backwards compatibility program already included Halo: Reach, Halo: Spartan Assault, and Halo Wars, so the latest additions tend to the bulk of the franchise library. Microsoft has previously revealed it expects to bring original Xbox games to the program, perhaps as early as this fall. It’s unclear what features and titles will be available, but Microsoft plans to share those details “closer to availability.”

The backward compatibility program is a free service for Xbox One owners that allows them to play select Xbox 360 games, provided they already own them on disc or have purchased them digitally. As digital titles you own are added to the program, they will appear in the “Ready to Install” area of your Xbox One’s dashboard. Physical games require you to insert the disc and install them to your hard drive. The disc is still required, even after you take that action.

You can view a current list of games available in a convenient text format on the Xbox site. The Xbox 360 library included thousands of titles, so many of your favorites may not yet be supported. Are there any games you’re especially anxious to see receive the backwards compatibility treatment?