Skulls are collectibles in Halo: Campaign Evolved that can be used to modify your playthrough. There are a grand total of 42 skulls and 39 of them are hidden throughout the game’s 13 levels. The other three are unlocked automatically once you find two skulls. 26 of these are legacy skulls, aka skulls that have featured in the Halo series before, while the remaining 16 are brand-new skulls. You’ll need to collect all skulls to tackle the famous LASO (Legendary All Skulls On) challenge, and if you want to earn the Headhunter achievement/trophy.
Here are all the skulls in Halo: Campaign Evolved and where to find them, broken down by level, along with an explainer on what skulls actually are and the full list of available skulls.
Update (July 30): We’ve updated this guide with the locations of every skull in Halo: Campaign Evolved.
All skull locations in Halo: Campaign Evolved
Each level in Halo: Campaign Evolved has three hidden skulls to collect (and one terminal). Follow the links to each individual level below to learn where they are:
- The Pillar of Autumn
- Halo
- The Truth and Reconciliation
- The Silent Cartographer
- Assault on the Control Room
- 343 Guilty Spark
- The Library
- Two Betrayals
- Keyes
- The Maw
- Boarding Action
- The Most Dangerous Game
- Heavy Burden
Halo: Campaign Evolved skulls list
Skulls in Halo: Campaign Evolved are essentially gameplay modifiers. Some grant buffs, while others make the game considerably tougher. Meanwhile, others are there for pure comedic purposes. You can enable any skulls you’ve unlocked before starting a new campaign or specific mission from the level select option.
Here is the full list of skulls in Halo: Campaign Evolved alongside their description:
| Skull name | Description |
|---|---|
| Acrophobia | The Corps: Now issue rifles AND wings… |
| Adaptation | Randomizes the enemy factions present in the mission. |
| Angry | Enemies fire their weapons faster and more frequently. |
| Armistice | Enemy factions never fight one another. |
| Bandana | Infinite ammo and grenades. |
| Black Eye | Your shields will only recharge when you melee enemies. |
| Blind | HUD and Weapons do not appear onscreen. |
| Boom | Explosion radius is increased by 2x. |
| Catch | Enemies throw and drop more grenades. |
| Cowbell | Physics mass of objects is reduced, making them more easily displaced. |
| Efficient | Enemies killed while the player is at full health drop more ammo. |
| Endurance Spec | UNSC vehicles cannot be damaged. |
| Eye Patch | All auto-aim is disabled for all weapons. |
| Famine | Weapons dropped by enemies contain half the ammo. |
| Floor is Lava | Take continuous damage whenever touching the “ground”. |
| Fog | Motion Tracker is disabled. |
| Foreign | Players cannot use weapons from another faction. |
| Ghost | Enemies no longer flinch when taking fire. |
| Give & Take | Firing your weapon drains your shield, but dealing damage to enemies recharges it. |
| Grunt Birthday Party | Grunt headshots produce legendary celebrations. |
| Grunt Funeral | Grunts die in a blaze of plasma. |
| Hip Fire | All weapon zoom functionality is disabled. |
| Iron | Dying in co-op resets you to your last checkpoint; dying while solo restarts the level. |
| IWHBYD | It would have been your dialogue. |
| Johnny Ammo Seed | When reloading you lose the ammo remaining in the discarded clip. |
| Leadhead | Headshots no longer provide extra damage or instant kills. |
| Magnified | 60-round magazines for the AR are now standard-issue. |
| Malfunction | Upon respawn a random element of your HUD no longer appears. |
| Mythic | Enemies have increased health. |
| Perspective | Changes the player camera to third-person. |
| Piñata | Punching enemies makes them drop inert grenades. |
| Pop | Shooting Flood in their weak point causes them to explode. |
| Recession | Every shot expends twice the normal amount of ammo. |
| Reload | Randomizes the pre-placed weapons for the mission. |
| Speed Limit | Take your time, enjoy the sights! Disables sprint. |
| Stowed Reload | Weapons continue to reload while stowed. |
| Temperamental | Allies will attack the player more quickly if the player kills a friendly. |
| That’s Just… Wrong | Enemies have increased awareness of the player. |
| They Come Back | Flood Combat Forms reanimated by Infection Forms are much more dangerous. |
| Thunderstorm | Upgrades the rank of most enemies. |
| Tilt | Enhances both positive and negative damage multipliers. Example: Plasma does more damage against shields, but less damage against health. |
| Tough Luck | Enemies always go berserk, constantly dive out of the way, and never run away from a fight. |
