Originally released in 2010, Halo: Reach is the final Halo game developed by Bungie after it handed off the franchise to Microsoft and its new developer, 343 Industries. A prequel to Halo: Combat Evolved, Halo: Reach tells a stirring story that ends on a dark note. The game puts you into the space marine boots of Spartan Six, not Master Chief.
Halo: Reach’s multiplayer content, as well as Forge and Theatre, will be added to Halo: MCC on Xbox One at no extra cost. However, the game’s campaign and fan-favourite Firefight multiplayer mode are coming together in a paid package. If you’re an Xbox Game Pass member, however, you’ll get “the entirety of Halo: Reach” without paying extra.
After Halo: Reach is added, Halo: The Master Chief Collection will include all but one of the mainline Halo FPS games. Only the Xbox One game Halo 5: Guardians is not in the package. That game, like Halo: The Master Chief Collection, is included with Xbox Game Pass.