The "Keyes" mission in Halo: Campaign Evolved tasks players with locating Captain Keyes aboard a Covenant vessel, but several hidden collectibles can be found along the way. Three skulls and one terminal are scattered throughout the mission, offering gameplay modifiers and lore.
The "Catch" Skull
The "Catch" skull, which causes enemies to throw and drop more grenades, requires players to be on heroic or legendary difficulty. To acquire it, players must reach the gravity lift within two minutes and 30 seconds from the mission's start. Once at the gravity lift, clear all marked enemies. As the player ascends, the skull will appear mid-air. It is important to note that enabling other skulls may prevent this one from spawning, so it is recommended to have all skulls disabled before attempting to collect it.
The "Blind" Skull
The "Blind" skull disables the player's HUD and weapon display. This skull can be acquired on any difficulty, and players can restart the level from rally point bravo if necessary. After ascending the gravity lift, follow the objective marker to the shuttle bay. In a two-floor room with a wraith in the center, a gap can be found by crouching between the wraith and the wall. The "Blind" skull is located at the top of the slope to the left within this gap.
The "Consumed" Terminal
The "Consumed" terminal is found shortly after reaching the shuttle bay. Turn left and proceed through a green door. After another left turn, players will encounter several enemies, including two Hunters. After defeating them, turn right where the Hunters were, followed by another left. The terminal will be located in front of the player.
The "Pinata" Skull
This skull, which causes meleeing enemies to drop inert grenades, is found after a cutscene reveals Captain Keyes has become part of the Flood. Immediately after regaining control of Master Chief, turn around and melee the Flood growth where Captain Keyes was four times. The "Pinata" skull will then drop to the ground.
