Halo: Campaign Evolved LASO Guide

Before starting the campaign

A Halo: Campaign Evolved LASO run uses Legendary difficulty and 17 specific Skulls that remain active throughout the playthrough. Collect the set, select the LASO preset from the Campaign menu and check the lobby before launching.

• Use the unlocked preset instead of recreating it one Skull at a time.
• Turn off every optional Difficulty Modifier for the entire Fireteam.
• Choose solo or co-op with Iron in mind: solo death restarts the level; co-op death returns to the last checkpoint.
• Open the relevant mission guide and agree where to save ammunition or protect a vehicle.

The route notes below are player recommendations, not extra MYTHIC requirements.

How the 17 Skulls work together

Treat the LASO preset as five connected problems rather than 17 separate switches.

Temperamental makes friendly kills turn allies hostile faster. Grunt Birthday Party and IWHBYD mainly change celebrations and dialogue.

Solo and co-op planning

Iron restarts the level after a solo death and resets a co-op Fireteam to its last checkpoint.

The following Fireteam roles are player recommendations:

1. Choose one route caller. With no Motion Tracker, one player calls the next doorway, vehicle or objective.
2. Announce shield melees. Let the player with the lowest shields take the safest Black Eye opportunity.
3. Split weapon roles. Keep precision ammunition with the long-range player and close-range stopping power near the doors.
4. Call explosive targets. Boom, Grunt Funeral and Pop can catch a teammate inside the enlarged blast.

Mission-by-mission risk plan

Use this list before opening each detailed walkthrough. It highlights where LASO effects meet the mission route, not a mandatory tactic.

If MYTHIC does not unlock

Before repeating the campaign, check the official conditions:

1. Confirm the run used the LASO preset unlocked by the 17 required Skulls.
2. Confirm the full campaign kept the preset active.
3. Check every Fireteam member: one optional Difficulty Modifier blocks MYTHIC.
4. Check the platform reward: 50 Xbox Gamerscore, a Steam achievement or a PlayStation Gold trophy.

If the reward is still missing, record the platform, profile, final mission and lobby settings before contacting Halo Support. The official article gives no universal checkpoint-recovery method, so do not delete a save for an unverified workaround.

LASO FAQ

Does “All Skulls On” mean all 42 Skulls?

No. The official LASO preset uses 17 specific Skulls, not all 42.

Can I add other Difficulty Modifiers?

Optional Difficulty Modifiers prevent MYTHIC. Leave them off for the entire Fireteam.

Is LASO available in solo and co-op?

Yes. Iron restarts the level in solo and returns a co-op Fireteam to its last checkpoint.

Does Campaign Remix unlock MYTHIC?

The option appears in both menus, but the achievement wording does not explicitly confirm Remix as an alternative. Use the standard campaign for the safest MYTHIC attempt.

Which Skull interactions matter most?

Start with Iron, Black Eye, Famine and Johnny Ammo Seed: they control death, shields and ammo. Then learn the Boom, Grunt Funeral and Pop explosion chain.