The "Assault on the Control Room" mission in Halo: Campaign Evolved features three hidden skulls and one terminal. This guide details their locations to aid players in their search.
Skull 1: IWHBYD
The IWHBYD skull, which alters enemy dialogue, is located shortly after players acquire the scorpion tank. After progressing through an initial structure and emerging into an area with a large bridge spanning a gulch, players should clear the enemies, cross the bridge in the scorpion, and take a left. At the end of this path, an icy wall conceals the skull. Park the scorpion against the wall and use its cannon as a platform to reach the vertical hole where the skull rests.
Terminal: Tangent I
Following the path with the scorpion, players will encounter and defeat Covenant vehicles before ascending a hill. Near the top of this hill, after dealing with an ambush, look for a large rock formation in the middle of the path. Enter the doors on either side of this formation. Inside, after dispatching enemies including a cloaked elite, proceed up the ramp to find the Tangent I terminal on a balcony.
Skull 2: Angry
The Angry skull, which increases enemy weapon firing speed, is found after players leave their scorpion tank to proceed through a cave. Upon exiting the cave into a large valley with several ghosts, players will notice three bridges crossing a lower section. The skull is situated at the top of the third and final bridge.
Skull 3: Cowbell
The Cowbell skull, which reduces the physics mass of objects, can be found when players exit a door to face two banshees. After dealing with enemies on the bridge, including an elite, players should look to the left. A support beam for the structure running underneath the bridge is visible. Jump onto this beam, turn around, and the Cowbell skull will be found nestled atop a rock underneath the bridge.
