Halo: Campaign Evolved Boarding Action Mission Guide & Achievements

Learn how to access and play the Boarding Action campaign mission in Halo: Campaign Evolved, including unlock requirements and achievements.

Quick answer

  • 1Boarding Action is the first mission of the Operation: METEORITE prequel campaign in Halo: Campaign Evolved.
  • 2It is unlocked and playable immediately upon launching the game on Xbox and Steam.
  • 3The plot features John-117 (Master Chief) and Avery Johnson boarding the Covenant ship Triumph of Tolerance.
  • 4Players can unlock two level-specific achievements: 'Before The Fall' and 'Souvenirs'.

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Overview of the Boarding Action Mission

The Halo: Campaign Evolved boarding action mission is the first level of the Operation: METEORITE prequel campaign, serving as the eleventh campaign mission overall in Halo: Campaign Evolved. Developed by Halo Studios, the game entered early access on July 23, 2026, introducing this high-stakes narrative experience to players on Xbox and Steam.

In this mission, players control John-117 (the Master Chief) alongside Avery Johnson as they conduct a daring naval boarding action against a Covenant starship named the Triumph of Tolerance. Chronologically, the events of this prequel level are preceded by "The Maw" (the final mission of the main campaign) and succeeded by "The Most Dangerous Game" (the second level of the Operation: METEORITE campaign).

Note: This campaign level is a distinct single-player/co-op experience and should not be confused with the classic multiplayer map of the exact same name from Halo: Combat Evolved.

How to Access and Play the Mission

Unlike traditional campaign structures, you do not need to complete the main story of Halo: Campaign Evolved to access the prequel content. The Boarding Action mission is available to play immediately upon launching the game for the first time.

However, Halo Studios officially recommends that players complete the main campaign before starting Operation: METEORITE. Because Boarding Action is designed for experienced players, it lacks introductory tutorials and features a significantly higher difficulty level than the early missions of the main game.

To start the mission, follow these steps:

1Launch Halo: Campaign Evolved
2Navigate to the campaign menu
3Select the Operation: METEORITE prequel campaign
4Launch the Boarding Action level

Achievements and Collectibles

There are two specific achievements associated with the Boarding Action level that players can earn on Xbox and Steam:

  • Before The Fall: Unlocked automatically upon completing the Boarding Action mission.
  • Souvenirs: Unlocked by finding all skulls and terminals in the level.

Please note that because the game is in early access, detailed step-by-step walkthroughs, full level maps, and complete dialogue transcripts for this mission are not yet available in the official documentation. Players will need to explore the corridors of the Triumph of Tolerance to locate the hidden collectibles on their own.

Frequently Asked Questions