Halo services on Xbox 360 will shut down in December 2021, Microsoft and 343 Industries have confirmed.
A Halo Waypoint post reads:
Every cycle spent maintaining and supporting Xbox 360 legacy services is time and energy not spent on the future of Halo. To that end – today we are announcing our intention to sunset our Halo Xbox 360 legacy services to fully focus on the future of the franchise. In approximately ONE YEAR, December 2021, online services for legacy Halo Xbox 360 titles will be discontinued. Owners of these titles will still be able to play these games indefinitely, however, certain online features and experiences, particularly online matchmaking, will be limited or disabled.
Halo titles on Xbox 360 have been delisted, and any 360 DLC can still be “acquired at no cost”. 343 Industries also confirmed that private matchmaking games will be supported in 360 versions of Halo beyond 2021.
343 Industries has started to migrate Xbox 360 Legacy data into appropriate games held within the Xbox One, Xbox Series X and Xbox Series S’s Halo The Master Chief Collection.
Halo The Master Chief Collection is available on Xbox One, Xbox Series X and Xbox Series S. It bundles Halo, Halo 2, Halo 3, Halo 3 ODST, Halo 4 and Halo Reach.