Halo: The Master Chief Collection

Solar Flare is a single mission, originally going to be a small campaign meant to mimic the pre-2000s FPS games like Half-Life in terms of look and feel. You are Zulu 1, the leader of fireteam Zulu, a Spartan III commando team. Take part in the Siege of Paris IV with pre-2000s art-style and classic-esque game-play. Set in the Project Daybreak fan timeline of the Halo Universe.

Revisit the debut prototype of Halo 2 in this restoration of the notorious "Earth City" demonstration, initially unveiled at the Xbox press conference during E3 2003. For the first time ever, take it to the streets, your way, with support for cooperative action, optional navigation points to rehearse the exact demo path and an included 'Playground' version of the level, allowing free roam of the city. This release represents an effort to rebuild content originally designed for a different functioning game engine, the first campaign collaboration between Digsite and Halo Studios.

Using evidence found within Halo 2's tags, map scripts, and other external media, Halo 2: Uncut aims to accurately restore as much cut content into the game as possible. Features pre-release elements such as cut weapons, cut weapon and vehicle functionalities, restored cut encounters and map scripts, and features Director's Cut-style cutscenes.

Season 8 succeeded Season 7, in October 2021. It included new non-canon armors, a new map, new collectibles, and Custom Game Browser support for Halo: Combat Evolved and Halo 3.

Season 7 succeeded Season 6, in June 2021. Named after the human designation for the Sangheili, the season included seven new armor permutations from Halo Online for the Elites as well as skins for the Type-1 energy sword for Halo 3, alongside vehicle skins and graphical updates for Halo: Combat Evolved, and the Champions Bundle content, weapon skins, armor effects, and the KEYSTONE helmet for Halo 4. It also added a new map for Halo 3, Edge.

Season 6 succeeded Season 5, in April 2021. Named after the ODST team Fireteam Raven, this season included new customization options for Halo 3, including animated visors and nameplates, back accessories, and new armor permutations from Halo: Online, as well as the four ODST armors used by Fireteam Raven in the namesake game. It also added a new map for Halo 3, Waterfall.

Titled after both the Anvil Initiative and ANVIL Station, Season 5 added the AKIS and Mariner helmets into Halo: Reach, years after being teased in promotional material for the Defiant Map Pack in 2011, alongside nameplates and additional cosmetic customization options to Halo: Reach and Halo 3, including 12 armors from the cancelled Halo Online for the latter.

Season 4 was launched with the release of Halo 4 for PC. Titled after the Forerunner term for humanity reclaiming the Mantle, this season brings additional cosmetic customization options to Halo 3 and Halo 4, and nameplates.

The third season was launched with the release of Halo 3: ODST for PC. Titled after Halo 3: ODST's original title (Halo 3: Recon), this season focuses on Halo 3 and Halo 3: ODST, adding weapon skins and visor colors to Halo 3, while reintroducing ODST's playable Firefight characters, and also adding nameplates.

This season was launched following the release of Halo 3 for PC. Titled after 343 Guilty Spark, this season focuses on Halo: Combat Evolved, adding vehicle and weapon skins, visor colors, and nameplates.

The first season implemented within The Master Chief Collection. Titled "Noble" after NOBLE Team, this season focuses on Halo: Reach, including the game's armor customization system.