http://411mania.com/games/halo-the-master-chief-collection-adds-spartan-ops-in-new-patch/

343 Industries has released a new Xbox One patch that adds in Halo 4’s Spartan Ops mode. The update, which was released earlier in the week, added the mode into the game in full; it was originally released in ten installments in the original game.

The update also makes the usual gamut of stability improvements and bugfixes, many of which make improvements to matchmaking, multiplayer and the user interface. You can see the full patch details below:

Spartan Ops:
* Added Halo 4’s Spartan Ops mode in its entirety.

Matchmaking:
* Made an update to make sure a match only starts when teams are even.
* Players will now receive a ‘loss’ when disconnecting before a round has ended.
* Made an update to include all split-screen players in vote tally.
* Resolved an issue that caused players to become stuck Joining Session.
* Resolved an issue where players could be dropped from matchmaking after disconnecting their controller.

General multiplayer updates:
* Made additional improvements to Halo: CE hit registration.
* Made an update to the Halo 2: Anniversary Career Progress page to ensure achievements are correctly tracked.
* Fixed an issue where it took a long time to join players that are in a multiplayer lobby.

General UI/menu updates:
* Made additional improvements to roster update times.
* Fixed Halo 3 game type text when viewing saved data in My Files.

Halo 2: Anniversary Campaign:
* Fixed an issue where the Black Eye Skull incorrectly prevented players from reaching checkpoints.

Campaign Playlists:
* Fixed an issue where cross-game playlists could fail to progress to the next level.
* Made several fixes to Campaign Playlist Carnage Reports.
* Fixed an issue where Halo 3 Cooperative Playlist progress would not save correctly when completing a mission.
* Made changes to ensure that Competitive Scoring and Timing are tracked correctly in Halo CE and Halo 2 Campaign Playlists.

Stats & medals:
* Made updates to improve stat tracking.
* Fixed an issue where the Steaktacular medal would not be correctly awarded in Halo 3.
* Fixed an issue where the Supercombine medal would be incorrectly awarded in the Halo 4 Campaign.

Achievements:
* Made an update to ensure that the Flaming Ninja Anniversary achievement unlocks when prerequisites are met.

Control layouts:
* Updated the Halo 2 Boxer button layout.
* Updated the Halo 4 Legacy thumbstick layout.

General stability:
* Made several updates to improve overall game stability.