A new update has finally enabled Xbox One discs to be playable offline on the Xbox Series X, as spotted by GamesRadar. Previously, the console required users to have an internet connection in order to play discs.
An Xbox engineering lead confirmed these changes, saying that this has been true as of the 2206 update. "We examined data since Series X|S launch & determined the online compatibility check isn't needed in the vast majority of cases for Xbox One discs," the tweet read. "Some games may still need to be updated online after install to ensure the best experience."
Since launch, the Xbox Series X console had previously required users to have an internet connection to play Xbox One discs even after installing the disc to the system. Users would still need an internet connection to launch the game.
Interestingly, Xbox Series X disc titles did not require an internet connection to be played. However, the system still requires an internet connection for initial setup and updates. Backwards compatible Xbox and Xbox 360 games still require an internet connection to be played