https://www.gamespot.com/articles/halo-the-master-chief-collection-coming-to-xbox-ga/1100-6461297/

During the Inside Xbox presentation during Gamescom 2018, it was announced that Halo: The Master Chief Collection is coming to Xbox Game Pass. This Xbox One exclusive includes anniversary editions of Halo: Combat Evolved and Halo 2, as well as Halo 3, Halo 3: ODST, and Halo 4. Although only the campaign for ODST is in the collection, the multiplayer of the other four games are all included.

Xbox also had some announcements in regards to the company's Game Pass program. Until August 31, new members only have to pay $2 for a two month membership. A beta for the Game Pass mobile app is also launching today. The app allows you to install games to your Xbox One remotely and monitor both Game Pass deals and the schedule for when titles are added or removed from the program. Android users can download the app through Google Play while iOS users need to secure a spot through TestFlight. Spots in the iOS beta are limited so act fast if you want in.