The “Truth and Reconciliation” mission in Halo: Campaign Evolved contains three hidden skulls and an Inquisitor terminal, which players can collect while attempting to rescue Captain Keyes. The collectibles add optional gameplay modifiers and lore, but are placed in easily missed areas that often require precise movement or entering spaces during enemy activity.

The Iron skull is near the gravity lift before boarding the Covenant battle cruiser and makes deaths more punishing, while Endurance Spec sits atop support pillars inside the ship and prevents UNSC vehicles taking damage. The Foreign skull is in a locked corridor in the hangar, accessible when enemies emerge, and stops players using weapons from another faction. The Inquisitor terminal is in a detention centre reached through the door immediately to the right in a multi-door room during the brig-rescue objective.