Skulls Location: Halo Campaign Evolved Guide

UNSC tactical archive / Alpha Halo

Every physical skull, every Campaign Remix unlock, and every access route arranged in campaign order. The three Operation: METEORITE prequel missions appear first, followed by the ten remade Combat Evolved missions.

42 total skulls39 mission pickups13 missions3 Remix unlocks

Mission briefing

What Campaign Evolved changes

Halo: Campaign Evolved rebuilds the original Halo: Combat Evolved campaign with a modern visual presentation, revised combat balance, expanded movement and aiming systems, and a broader weapon and enemy sandbox. The campaign now spans 13 missions, including three Operation: METEORITE prequel missions set before the events of the original game.

The remake contains 42 gameplay-modifying skulls. Thirty-nine are physical collectibles, with three hidden in every mission. Collecting any three skulls unlocks Campaign Remix and automatically awards Adaptation, Reload, and Armistice, bringing the full total to 42.

Archive record

How skulls became a Halo institution

Skulls first appeared in Halo 2 in 2004 as secret objects hidden in campaign levels. Finding one activated an unusual rule change, often making the game harsher, stranger, or funnier. What began as an Easter egg system became one of Halo's defining replay features.

Later games formalised skull selection before missions and expanded the concept across Halo 3, Halo: Reach, Halo Infinite, anniversary releases, and other modern entries. The system also created LASO, Legendary All Skulls On, one of the franchise's most demanding challenge formats, while arcade skulls such as Grunt Birthday Party and Bandana made repeat playthroughs deliberately chaotic.

Skull 01 of 42

Malfunction

ChallengeRoute Detour

Location and access route

1. Reach the fight against the two white-armoured Hunters.
2. Clear the arena, then move right instead of following the objective route.
3. Drop to the lower area beneath the Covenant dropship.
4. Enter the door ahead and follow the passage behind the turret.
5. Collect the skull from the floor at the end of the route.

What to use it for
Use it to create an information-starved challenge run where deaths progressively disrupt navigation, shield awareness, ammo tracking, or targeting information.

Skull 02 of 42

Johnny Ammo Seed

Brand-NewUpper Ledge

Location and access route

1. Enter the palace-like training room with the horizontal purple cylinder overhead.
2. Clear the enemies and climb to the second floor.
3. Turn back toward the entrance side of the room.
4. Take the rear-left exit and follow the upper path.
5. The skull rests on the ledge at the end.

What to use it for
Use it to punish habitual reloading and make ammunition discipline central to every encounter.

Skull 03 of 42

Leadhead

Brand-NewEasy

Location and access route

1. Continue toward the upper decks until Johnson activates a gravity lift.
2. Defeat the Covenant waves in the holdout room.
3. Face the back of the room and take the door on the left.
4. Follow the short corridor to the skull.

What to use it for
Use it to force sustained body-shot combat and reduce the dominance of precision weapons.

Skull 04 of 42

Temperamental

Brand-NewThree-Part Trigger

Location and access route

1. At the first marked high-value target sighting near the purple trees, fully strip its shields.
2. At the second sighting across the bridge near the Wraith, strip its shields again.
3. At the third marked sighting later in the mission, break its shields a third time.
4. Clear the remaining Covenant in the final arena.
5. The skull spawns inside the blue-lit machine in the centre of the arena.

What to use it for
Use it to make co-op splash damage, reckless vehicle driving, and friendly fire far more consequential.

Skull 05 of 42

Recession

ChallengeHidden Door

Location and access route

1. Reach the bridge encounter with a Wraith positioned ahead.
2. Turn around and face the purple building behind you.
3. Locate the two explosive boxes beside the doorway and purple flames.
4. Shoot both boxes to blast the door open.
5. Enter the exposed doorway and collect the skull.

What to use it for
Use it for scarcity-focused runs where burst control, weapon swaps, and scavenging matter more than raw firepower.

Skull 06 of 42

Ghost

ChallengeTricky Rock Climb

Location and access route

1. After the gate speech, clear the Covenant in the valley.
2. Return to the valley and hug the left-hand wall until you reach the tree.
3. Climb the narrow rock crevices beside the stalagmites.
4. From the upper ledge, line up a jump toward the purple flames and projecting branches.
5. Land on the ledge and take the skull.

What to use it for
Use it to remove stagger-lock tactics and make close-range enemies much harder to interrupt.

Skull 07 of 42

Eye Patch

ChallengeEasy Detour

Location and access route

1. Reach the point where the objective directs you across a bridge.
2. Stay on your current side and continue along the higher walkway instead.
3. Follow the upper route to its far end.
4. Collect the skull from the ledge beside the locked door.

What to use it for
Use it for raw aim practice or a more demanding controller run without targeting assistance.

Skull 08 of 42

Grunt Birthday Party

ArcadeShort Platform Jump

Location and access route

1. Reach the room where you regroup with Williams and the UNSC survivors.
2. Drop one level down on the left side near the staircase.
3. Stand on the closest purple flame fixture.
4. Jump to the central rock formation and land on the flat surface beneath the skull.
5. Jump in place to collect it.

What to use it for
Use it for comic feedback, clearer headshot confirmation, and classic Halo arcade energy.

Skull 09 of 42

Efficient

Brand-NewMoving Platform Detour

Location and access route

1. Restore power during the moving-platform sequence and re-board the platform.
2. Ride through the bridge room until the next forced dismount.
3. Jump left onto the side platform.
4. Immediately jump toward the back-right corner.
5. Collect the skull beside the locked door.

What to use it for
Use it to reward clean ranged play and turn flawless encounter openings into a stronger ammo economy.

Skull 10 of 42

Speed Limit

ClassicalEasy

Location and access route

1. At the start of the mission, face the rear wall of the cryo room.
2. Find the wall painted with two UNSC emblems.
3. Climb the stacked containers on the left.
4. Mantle onto the upper walkway and follow it to the end.
5. Pick up the skull.

What to use it for
Use it for a more authentic Combat Evolved pace or to make positioning and retreats more deliberate.

Skull 11 of 42

Magnified

ClassicalEasy

Location and access route

1. Follow the weaponless escort route into the armory.
2. Approach the first central weapon rack.
3. Look across the top centre of the rack.
4. Collect the skull before leaving the armory.

What to use it for
Use it to strengthen sustained fire and recreate the oversized magazine feel associated with classic Halo combat.

Skull 12 of 42

Perspective

Brand-NewEasy Backtrack

Location and access route

1. Complete the bridge cutscene with Keyes and Cortana.
2. Turn around and re-enter the bridge.
3. Move toward the forward windows and the two crew workstations.
4. Drop into the recessed lower workstation area.
5. Collect the skull below.

What to use it for
Use it to play the campaign from behind Master Chief, gain wider spatial awareness, and radically change the feel of familiar encounters.

Skull 13 of 42

Give & Take

Brand-NewCave Detour

Location and access route

1. Reach the open valley containing three rescue objectives.
2. From the valley entrance, follow the right side toward the rightmost objective.
3. Find the river just left of that objective marker.
4. Follow the river upstream into the cave.
5. Look beside the rock surrounded by green flies and collect the floating skull.

What to use it for
Use it for aggressive momentum runs where accurate damage sustains survival and missed shots carry an immediate defensive cost.

Skull 14 of 42

Grunt Funeral

ChallengeGrenade Jump Required

Location and access route

1. In the three-objective valley, travel to the left objective structure.
2. Remain outside at ground level instead of entering the underground route.
3. Climb the diagonal ramps beside the blue light.
4. Use a grenade jump to reach the far side of the exterior structure.
5. Collect the skull from the elevated route. Acrophobia can simplify this on a replay.

What to use it for
Use it to create chain reactions in Grunt-heavy encounters, while accepting a much greater risk at close range.

Skull 15 of 42

Floor Is Lava

Brand-NewRock Platforming

Location and access route

1. Travel to the right-side objective area in the three-objective valley.
2. Identify the rocky zone patrolled by Jackal snipers.
3. Climb the rocks at the rear of the area.
4. Cross toward the right-side rock cluster.
5. Drop onto the lower right rock and collect the skull.

What to use it for
Use it to convert normal combat spaces into traversal puzzles that demand rocks, structures, vehicles, and constant movement planning.

Skull 16 of 42

Iron

ChallengeCliff Drop

Location and access route

1. Reach and clear the exterior gravity-lift arena.
2. At the rear cliff, locate the cluster of three unusual trees.
3. Stand just left of the left cactus-like tree and look over the edge.
4. Drop carefully onto the small ledge below.
5. Collect the skull, then use nearby branches to climb back up.

What to use it for
Use it as a core LASO-style punishment modifier where every mistake threatens major progress.

Skull 17 of 42

Endurance Spec

ClassicalPrecision Momentum Jumps

Location and access route

1. Inside the ship, reach the large upper room with floor-to-ceiling purple supports.
2. Follow the platform to the far opposite corner.
3. Sprint and jump across the slanted faces of the purple supports.
4. Maintain momentum because stopping causes you to slide off.
5. Reach the final support and collect the skull.

What to use it for
Use it for indestructible Warthog and Scorpion runs, safer vehicle achievements, or pure Covenant-stomping chaos.

Skull 18 of 42

Foreign

ChallengeTimed Door

Location and access route

1. Reach the later hangar where a Covenant dropship departs.
2. Fight toward the locked door at the far end of the room.
3. Wait nearby until Covenant reinforcements open it.
4. Move through before the door closes.
5. Turn left inside and collect the skull.

What to use it for
Use it to enforce faction-pure loadouts and make weapon planning far more restrictive.

Skull 19 of 42

Bandana

ArcadeEasy

Location and access route

1. Reach the first main island structure with the Warthog.
2. Do not enter through the main doorway.
3. Find the small cave immediately to the right of the entrance.
4. Follow the cave to its end.
5. Collect the skull.

What to use it for
Use it for weapon experimentation, explosive-heavy arcade runs, or easier collectible clean-up.

Skull 20 of 42

Acrophobia

ArcadeCentral Pillar Jump

Location and access route

1. Travel from the shoreline to the circular area patrolled by two Hunters.
2. Defeat the Hunters before attempting the route.
3. Walk up the diagonal side of the central structure.
4. Turn around at the top and jump onto the central column.
5. Collect the skull behind the tree.

What to use it for
Use it to bypass difficult jumps, inspect levels from new angles, and accelerate later skull or terminal clean-up.

Skull 21 of 42

Hip Fire

ClassicalControlled Drop

Location and access route

1. Disable security and enter the previously locked interior route.
2. Descend until you reach the level containing two Hunters.
3. Find the stairwell with a blue-lit central shaft.
4. Look down the opening and identify the narrow ledge.
5. Drop onto the ledge and collect the skull.

What to use it for
Use it to force classic hip-fire combat and remove modern precision aiming conveniences.

Skull 22 of 42

IWHBYD

ArcadeScorpion Step

Location and access route

1. Reach the icy chasm section where you drive a Scorpion across a bridge.
2. On the far side, turn left toward the rock opening near the mounted gun.
3. Park the Scorpion directly beside the opening.
4. Climb onto the tank and look into the rock hole.
5. Collect the skull inside.

What to use it for
Use it to surface unusual Marine, Covenant, and ambient dialogue during repeat playthroughs.

Skull 23 of 42

Angry

ChallengeStructure Jump

Location and access route

1. Continue beyond the cave where the Scorpion route ends.
2. Reach the next area where the objective bends to the right.
3. Look toward the downward ramp crossed by a horizontal structure.
4. Jump onto the rear structure above the ramp.
5. Move to its centre and collect the skull.

What to use it for
Use it to reduce safe exposure windows and intensify every ranged engagement.

Skull 24 of 42

Cowbell

ArcadeBridge Drop

Location and access route

1. Near the end of the mission, emerge onto the high bridge.
2. Walk to the bridge midpoint and look for the structure passing beneath it.
3. Drop onto that lower structure.
4. Turn around toward the snowy rock.
5. Collect the skull.

What to use it for
Use it for exaggerated explosions, flying props, stronger impact reactions, and chaotic sandbox play.

Skull 25 of 42

Fog

ChallengeEasy

Location and access route

1. Move past the destroyed Pelican at the mission start.
2. Spot the Covenant dropship embedded in the giant tree.
3. Turn back and climb the hill on the right.
4. Continue upward beside the huge roots to the small dirt mound.
5. Collect the skull on top.

What to use it for
Use it to increase uncertainty, especially against Flood attacks arriving from multiple directions.

Skull 26 of 42

That's Just... Wrong

ChallengeScripted Drop

Location and access route

1. Progress deep into the facility beyond the dead Covenant.
2. Continue until a human soldier suddenly turns hostile on the main route.
3. Kill the attacking soldier.
4. Collect the skull he drops.

What to use it for
Use it to weaken stealth, increase pursuit pressure, and make disengagement less reliable.

Skull 27 of 42

They Come Back

ChallengeForest Branch Route

Location and access route

1. Reach the dark forest evacuation defence where Sentinels assist against the Flood.
2. Move behind the nearby structure and locate the glowing plant.
3. Use the plant to identify the fallen branch beside it.
4. Cross the branch to the far side.
5. Turn left and collect the skull.

What to use it for
Use it to make corpse control, Infection Form priority, and overkill damage much more important.

Skull 28 of 42

Tilt

ChallengeEasy

Location and access route

1. Pass through the Flood-overgrown tunnel where Sentinels begin supporting Guilty Spark.
2. As soon as you emerge, turn around.
3. Jump onto the ramp on the left.
4. Climb to the top and collect the skull from the centre.

What to use it for
Use it to reward correct weapon matching while severely punishing ineffective damage types.

Skull 29 of 42

Pop

Brand-NewOpposite Platform Jump

Location and access route

1. Reach the checkpoint labelled Wait, It Gets Worse after the elevator descent.
2. Stand near the locked door where Guilty Spark waits.
3. Turn around and climb one of the nearby ramps.
4. Jump across to the platform opposite the locked door.
5. Check the wall ledge and collect the skull.

What to use it for
Use it for chain reactions and crowd control in dense Flood encounters.

Skull 30 of 42

Famine

ChallengeEasy

Location and access route

1. Complete the third elevator descent.
2. Take the central ramp leading down toward the final chamber route.
3. Pass through the doorway into the Flood-filled section.
4. Immediately check the left corner.
5. Collect the skull.

What to use it for
Use it to make scavenging less dependable and turn ammunition efficiency into a persistent survival problem.

Skull 31 of 42

Tough Luck

ChallengeBanshee Route

Location and access route

1. Reach the first exterior section and obtain a Banshee.
2. Fly back toward the building you just exited.
3. Aim for the platform in front of the bright blue light at the building's centre.
4. Land on the platform and collect the skull.

What to use it for
Use it to make enemy movement less predictable and every encounter more relentless.

Skull 32 of 42

Black Eye

ChallengeEasy Detour

Location and access route

1. Destroy the conduits at the first pulse generator and return outside.
2. Locate the three large ramps hanging over the lower route.
3. Move behind the ramps.
4. Search among the orange Flood growths at the rear.
5. Collect the skull.

What to use it for
Use it to transform shield recovery into a high-risk close-combat mechanic and a defining LASO challenge.

Skull 33 of 42

Mythic

ChallengeMulti-Stage Banshee Puzzle

Location and access route

1. At the later route split, take the left path with the Banshee and turret.
2. Fly to the rooftop of the building ahead and activate the control panel.
3. The panel opens a remote door on a neighbouring platform.
4. Fly to the opened door and fight through the first room and tunnel.
5. Clear the second room, then collect the skull from the central structure.

What to use it for
Use it for longer, more resource-intensive firefights and traditional high-difficulty runs.

Skull 34 of 42

Catch

ChallengeHeroic or Legendary, Time-Sensitive

Location and access route

1. Start the mission on Heroic or Legendary difficulty.
2. Sprint from the opening toward the gravity lift, bypassing unnecessary fights.
3. Kill only the enemies required to activate the lift.
4. Stand in the centre of the lift and hold the interact control as you rise.
5. Collect the skull while being pulled into the ship.

What to use it for
Use it to fill encounters with explosive area denial and increase the danger of clustered enemies.

Skull 35 of 42

Blind

ChallengeCrouch Route

Location and access route

1. Reach the Flood-filled vehicle room containing a Ghost and a Wraith.
2. Move behind the Wraith to the narrow corridor.
3. Crouch beneath the obstructing vehicle to reach the far side.
4. Continue to the locked door.
5. Collect the skull beside it.

What to use it for
Use it for a stripped-back cinematic challenge where aiming, health awareness, and ammunition tracking rely on memory and instinct.

Skull 36 of 42

Piñata

ArcadeEasy

Location and access route

1. Watch the cutscene revealing Captain Keyes.
2. When control returns, turn around toward the Flood growth.
3. Melee the growth three or four times.
4. Collect the skull when it appears.

What to use it for
Use it to turn close-range aggression into a renewable grenade supply.

Skull 37 of 42

Stowed Reload

Brand-NewEasy

Location and access route

1. Continue beyond the bridge sequence where Guilty Spark returns.
2. Reach the large cryo-storage room where Sentinels fight Flood around four cryo pods.
3. From the entrance, move to the back-left corner.
4. Collect the skull.

What to use it for
Use it to make rapid weapon swapping more effective and keep both weapons combat-ready with less downtime.

Skull 38 of 42

Boom

ChallengeNarrow Ledge Drop

Location and access route

1. At the Light Fuse checkpoint, climb the right ramp in the engine-room hangar.
2. Use the open route to reach Floor 3.
3. At the small platform, ignore the door marked as the exit.
4. Jump to the open doorway on the right, then look down and right for a narrow path.
5. Drop to the path, follow it, and collect the skull.

What to use it for
Use it for devastating splash damage, larger chain reactions, and a much higher risk of self-inflicted explosions.

Skull 39 of 42

Thunderstorm

ChallengeWarthog Side Tunnel

Location and access route

1. Begin the final Warthog escape.
2. Watch the tunnel walls for the second small side route.
3. Turn into it just before the Sentinel-versus-Flood encounter.
4. Drive to the remains in the middle of the side tunnel.
5. Collect the skull.

What to use it for
Use it to increase shields, weapons, aggression, and battlefield pressure without changing mission geometry.

Skull 40 of 42

Adaptation

Brand-NewAutomatic Unlock

Location and access route

1. Collect any three physical skulls from campaign missions.
2. Campaign Remix unlocks automatically.
3. Adaptation is awarded immediately and can be enabled in standard or remixed mission play.

What to use it for
Use it to rebuild familiar encounters with Covenant, Flood, Sentinel, and Operation: METEORITE enemy combinations.

Skull 41 of 42

Reload

Brand-NewAutomatic Unlock

Location and access route

1. Collect any three physical skulls from campaign missions.
2. Campaign Remix unlocks automatically.
3. Reload is awarded immediately and can be enabled in standard or remixed mission play.

What to use it for
Use it for Fiesta-style campaign runs where every rack, corpse, and pickup can reshape your loadout.

Skull 42 of 42

Armistice

Brand-NewAutomatic Unlock

Location and access route

1. Collect any three physical skulls from campaign missions.
2. Campaign Remix unlocks automatically.
3. Armistice is awarded immediately and can be enabled in standard or remixed mission play.

What to use it for
Use it to stop Covenant, Flood, Sentinels, and other hostile groups from thinning each other out, concentrating every threat on the player.

Skull-hunting field notes

Nearby skulls emit a faint whispering or hissing sound. Slow down when you reach the described landmark and use headphones when possible.

• Collect any three easy skulls to unlock Campaign Remix and its three automatic skulls.
• Acrophobia is the strongest clean-up tool because flight bypasses many later jumps and hidden ledges.
• Catch in Keyes requires Heroic or Legendary difficulty and must be grabbed while rising through the gravity lift.
• Grunt Funeral is designed around a grenade jump, although Acrophobia can simplify the return trip.