The Halo Campaign Evolved Achievement Guide

Halo: Campaign Evolved ships with 58 achievements, and 57 of them are published in full on Steam's global achievements page with names and unlock conditions. This guide lists all 57 published achievements, groups them by what they ask you to do, and quotes Steam's unlock text verbatim. The one remaining achievement is hidden, so Steam displays it without a name, a description, or a global percentage, and it is documented here as a gap rather than guessed at. Every table row comes from the verified research dataset behind this site, captured on August 22, 2026.

How the 58 achievements break down

The published 57 split into clear groups once you read the unlock conditions side by side. Thirteen mission completions mirror the 13-mission campaign, eighteen collectible entries track Skulls and Terminals at several scales, five difficulty achievements run from Easy up to LASO, three belong to Campaign Remix, and the remaining eighteen are special challenges tied to stunts, combat totals, or named Skulls. The hidden fifty-eighth sits outside every group until Steam publishes its identity.

Mission completion achievements

Every one of the 13 missions has a completion achievement, and the unlock text follows the same simple formula: complete the mission. The classic ten run from The Autumn Leaves for Pillar of Autumn to Dust & Echoes Evolved for The Maw, with names such as Bee Thirty for Silent Cartographer and Control Alt Delete for Assault on the Control Room along the way. The three Operation: METEORITE missions follow the same pattern with Before the Fall, Tiger Company, and Personal Space. Because each one only asks you to finish the mission, these achievements come naturally from a full playthrough on any difficulty.

Personal Space and its collectible sibling Parting Gifts unlock by completing the mission Steam names Heavy Burden. That final METEORITE mission name is still disputed against Bitter Harvest in the official record, and this site tracks the conflict without resolving it. The table above quotes Steam's published text exactly, so the disputed name appears as Steam prints it, and nothing on this page numbers the METEORITE missions as 11 through 13.

Collectible achievements

Collectible achievements track Skulls and Terminals at three scales. Cranial unlocks with your first Skull, Making a Necklace at 22 Skulls, and Headhunter at all 39, while Lore Have Mercy asks you to activate all 13 Terminals and Collector’s Addition asks for every Skull and Terminal in the game. Between those milestones sit thirteen mission-scoped entries, from Clean Sweep for Pillar of Autumn to No Rush for The Maw, each asking you to find all Skulls and Terminals in a single mission. Steam's Headhunter text names 39 as the complete total, which matches the number Halo Support repeats even though that support article visibly lists 42 Skull names.

Planning collectible runs around Mission Select is the practical route, because Rally Points let you re-enter an unlocked mission without restarting the campaign. The Skulls & Collectibles guide explains what is verified about per-mission Skull counts, and the mission list maps every mission to its Terminal. Neither page publishes exact Skull locations, because no official source documents them.

Difficulty and LASO achievements

Four achievements reward finishing the campaign at each difficulty: Greenhorn on Easy, Birth of a Spartan on Normal, Heroes Never Die on Heroic, and Living Legend on Legendary. MYTHIC sits above all of them and asks you to complete the campaign with LASO enabled. Halo Support describes LASO as a 17-Skull subset with its own solo and co-op death behavior, so treat it as a separate project rather than a harder Legendary run. No achievement asks for a timed finish or a score threshold, so difficulty is the only official performance axis.

Special challenge achievements

Special challenges are mission stunts and combat totals with precise conditions. Map Quest asks for a Silent Cartographer run without shooting, grenades, melee, dying, or restarting, That’s My Ride asks you to reach the Banshee before the Elite on Assault on the Control Room, and This is My Ship Now recreates a very specific betrayal scene aboard the Pillar of Autumn. Combat totals include Make Them Count for 100 headshot kills, Disarmed for 100 dismembered Flood parts, and Bad Gas for 100 destroyed Grunt backpacks, alongside vehicle stunts such as New Whip and Clean Lap. Several challenges bind to named Skulls, including Even Tempered, Frugal Fire, Hot Streak, and Like Old Times, so they overlap naturally with a Skull-collecting route.

Campaign Remix achievements

Three achievements belong to Campaign Remix, the randomization mode that unlocks after collecting hidden Skulls, and together they form a difficulty ladder of their own. The first completes a single remixed mission, the second completes one without dying, and the third completes an entire remixed campaign without dying. The Campaign Remix summary on the guide hub explains how Remix Selection stacks required and random Skulls, which is the mechanic these runs are built on. No achievement tracks Remix beyond these three, so a normal campaign run never needs the mode.

• REMIX! — complete a Remixed Mission
• Beat the Drop — complete a Remixed Mission without dying
• Mix Master — complete an entire Remixed Campaign without dying

Achievements in co-op

Achievements can be earned during co-op play, and the official co-op guide states that shared unlocks are credited to the participating players. The fireteam's mission options are bounded by the Fireteam Leader's campaign progress, which also bounds where a group achievement hunt can go. For LASO specifically, Halo Support describes co-op death behavior that differs from solo play, so read the co-op guide and the LASO notes on the Skulls page before planning a group attempt.

The hidden achievement

Steam's global achievements page renders one of the 58 rows without a name, a description, or a global percentage, and that is the only hidden achievement in the set. Its identity is not published anywhere this research captured, so this guide does not guess at it. When Steam or Halo Studios names it, the research dataset and this page will be updated together.

Achievement rarity is a dated metric

Global unlock percentages change whenever more players earn achievements, so they are a dynamic metric rather than a fixed fact worth publishing. The research behind this site captured a dated snapshot on August 22, 2026, and keeps it in the research archive instead of on this page. Treat any percentage you see elsewhere as a snapshot with its own capture date, and expect it to drift.

Where this list comes from

The 57 published names and unlock conditions in the table come from Steam's global achievements page for Halo: Campaign Evolved, captured and verified on August 22, 2026. Gamerscore and trophy point values were not captured for this dataset, and localized names beyond a few store-preview pairings are likewise out of scope. If a future patch adds or renames achievements, the dataset's expected totals will fail loudly during the site build instead of silently drifting.

Official SourceSteam — Global Achievements — accessed 2026-08-22

Official SourceSteam — Store Page — accessed 2026-08-22

Conflict SourceHalo Support — Collectibles in Halo: Campaign Evolved — accessed 2026-08-06