Quick answer
All four collectibles in '343 Guilty Spark' are found at: (1) First skull near burning ship and tree trunk, (2) Second skull from a soldier after locating Captain Keyes, (3) Terminal at Rally Point Charlie via white-circle door, and (4) Third skull in swamp near evac point.
Guide briefing
Halo Campaign Evolved: 343 Guilty Spark Skulls and Terminal Guide
All four collectibles in '343 Guilty Spark' are found at: (1) First skull near burning ship and tree trunk, (2) Second skull from a soldier after locating Captain Keyes, (3) Terminal at Rally Point Charlie via white-circle door, and (4) Third skull in swamp near evac point.
Applies to
- — Halo Campaign Evolved - 343 Guilty Spark mission
- — Players seeking full collectible completion
- — Guides for first-time or replay playthroughs

Target
First Skull
- Checkpoint
- Start of Mission
- Landmark
- Burning ship, trees, boulder, giant tree trunk
Do this
- 1From the starting checkpoint, turn left instead of following the main quest objective.
- 2Hop over the boulder and follow the path alongside the giant tree trunk.
Confirmation
First Skull is available as described. The first skull is located between the tree trunk and a glowing tentacle on a small hill.

Target
Second Skull (Soldier Drop)
- Checkpoint
- After encountering soldier
- Landmark
- Paranoid soldier near objective marker
Do this
- 1Continue forward past the initial objective marker to locate the soldier.
- 2Engage and eliminate the soldier to retrieve the skull from his body.
Confirmation
Second Skull (Soldier Drop) is available as described. This is the second collectible of the mission and appears after completing the initial objective to locate Captain Keyes.

Target
Terminal at Rally Point Charlie
- Checkpoint
- Rally Point Charlie
- Landmark
- Light bridge with blue/white circle doors
Do this
- 1Load into the Rally Point Charlie checkpoint.
- 2Cross the light bridge and choose the side with white circles on the door.
- 3Enter the hallway where the terminal is located.
Confirmation
Terminal at Rally Point Charlie is available as described. The terminal is in the hallway after the light bridge, not on the bridge itself.

Target
Third Skull
- Checkpoint
- Near evac point
- Landmark
- Swamp area, log, trees, tentacles
Do this
- 1Proceed toward the evac point but do not complete the objective.
- 2Turn right and walk under trees into the swamp, hugging the right wall.
- 3Cross the log similar to the one seen earlier to reach the final skull.
Confirmation
Third Skull is available as described. This is the last collectible of the mission and requires navigating through a dark, swampy section.