Finding all Skulls in Halo Campaign Evolved requires navigating off-path areas and solving specific environmental puzzles. With 42 total Skulls—three per level plus three for Campaign Remix—players can use the game's audio cues, specifically a ghostly breathing sound, to help pinpoint their locations.

Pillar of Autumn Skulls

  1. Speed Limit: From Rally Point Alpha, climb the two round containers on the left, jump to the upper walkway, and follow it to the end.
  2. Magnified: In the armory room (where the marine leads you), the Skull sits on the weapon rack near the center.
  3. Perspective: After meeting Keyes at the bridge, return to the bridge control area and drop into the floor space below the pilots.

Halo Skulls

  1. Grunt Funeral: At the Rally Point Charlie lifeboat crash site, use a frag grenade to boost yourself onto the narrow ledge of the central Forerunner spire. (The Acrophobia Skull makes this easier).
  2. Floor Is Lava: From the Rally Point Charlie rockslide, jump from the largest rock to the smaller rock ahead and below.
  3. Give & Take: Follow the river uphill to the tall tunnel; the Skull is near the largest rock on the left.

Truth and Reconciliation Skulls

  1. Iron: Before the gravity lift, locate the small tree on the cliff edge. Drop down to the tiny ledge below.
  2. Endurance Spec: In the vehicle bay (Rally Point Bravo), jump across the three columns on the right walkway to reach the third one.
  3. Foreign: In the shuttle bay (Rally Point Bravo), enter the door that opens for enemies and find the Skull in the corner by the purple hologram.

Silent Cartographer Skulls

  1. Acrophobia: At the Hunter pair location, walk up the incline of the central Forerunner structure.
  2. Bandana: Outside the main entrance, look to the right for a hole in the cliff leading to a small cave.
  3. Hip Fire: In the stairwell with the blue hologram, drop down into the gap to land on a corner ledge.

Assault on the Control Room Skulls

  1. IWHBYD: After crossing the bridge with the Scorpion, reverse the tank near the ice wall gap, climb the turret, and jump to the Skull.
  2. Angry: In the snowy clearing before the Ziggurat, climb the right-most arch structure.
  3. Cowbell: Under the bridge near the Ziggurat, climb the slope and drop down to the rock below.

343 Guilty Spark Skulls

  1. Fog: After the crashed Spirit, climb the dirt bank on the left near the purple light.
  2. That's Just… Wrong: Kill the insane marine found in the Forerunner facility.
  3. They Come Back: At the end of the level, climb the felled tree in the forest and drop to the rock formation.

The Library Skulls

  1. Tilt: At the service tunnel exit, climb the left slope.
  2. Pop: At the first door 343 Guilty Spark opens, jump from the pillars to the ledge with the upward-facing light.
  3. Famine: After the elevator to the final floor, head left into the corridor filled with Flood goop.

Two Betrayals Skulls

  1. Tough Luck: Fly a Banshee to the top of the Control Center spire.
  2. Black Eye: In the snowy area with three arches, go to the dead end of Flood growths.
  3. Mythic: In the snow canyon, fly to the top of the tower, activate the console, and fight through the subsequent rooms to reach the enclosure.

Keyes Skulls

  1. Catch: Speedrun the opening section on Heroic difficulty or higher to reach the gravity lift quickly, then hold Square/X at the top.
  2. Blind: In the vehicle bay, crouch-walk under the destroyed Wraith to reach the end of the corridor.