Halo Campaign Evolved: 343 Guilty Spark Skulls Guide

Halo Campaign Evolved’s 343 Guilty Spark mission hides several collectibles tied to the Flood-heavy stretch of the campaign. Players looking to complete the run for the Fog Skull, That’s Just… Wrong Skull, and They Come Back Skull also have a Tangent II Terminal to find along the way.

The mission’s lighting makes navigation tricky, and at least one objective disables core tools—so plan to move deliberately. The walkthrough below focuses on how to reach each item and what each one changes for gameplay.

Quick facts: 343 Guilty Spark collectibles

Fog Skull disables the Motion Tracker.
That’s Just… Wrong increases enemies’ awareness of your location.
They Come Back makes reanimated Flood combatants more dangerous.
Tangent II Terminal is found during the escape sequence.

Fog Skull location (Skull #1)

Start the mission and move forward past the Pelican as the radio broadcast plays. You’ll come to a Covenant dropship crashed into a tree; facing the ship, head left and climb up the hill.

As you walk uphill, keep your eyes on the right. You should spot two smaller trees—walk between them to reach the Skull at the edge of the cliff.

With the Fog Skull active, the Motion Tracker will be disabled.

That’s Just… Wrong Skull location (Skull #2)

The next Skull is tied to the segment where you’re trying to find Captain Keyes. Work through the facility until you reach a quiet room filled with dead Covenant members.

Continue through the doors toward the objective and watch for a lone Marine. He will begin shooting out of fear—kill the Marine to retrieve the Skull from his body.

With That’s Just… Wrong enabled, enemies will have increased awareness of your location.

Tangent II Terminal location (Terminal #1) and They Come Back Skull (Skull #3)

After your first encounter with the Flood, you’ll be forced to escape the facility. Continue following objectives until you enter a large room with doors on both the left and right, each marked by symbols above them.

Go through the door on the right. Immediately look left to find dead Marines with Shotguns, then move toward the objective door without going through it. Instead, turn right to locate the Terminal in the dark by the wall.

Once you reach the evac area, you’ll be tasked with guiding surviving Marines to the point where drones fire laser attacks at the Flood. When you arrive, hug the wall on the right, move forward to avoid unnecessary combat, and then head behind the structure.

From there, walk toward the back of the map in the dark forest. When you see a glowing green plant near a large tree, you’re in the right area—navigate behind the tree to find a toppled branch you can cross like a bridge.

At the end of the bridge, look left to find the They Come Back Skull on the ground. They Come Back makes reanimated Flood combatants more dangerous.