Where to Find Every Collectible in Halo Campaign Evolved’s Assault on the Control Room

    By Jake Fillery Published Jul 24, 2026, 10:38 AM EDT Jake Fillery is an Evergreen Editor for GameRant who has been writing lists, guides, and reviews since 2022. With thousands of engaging articles and guides, Jake loves conversations surrounding all things to do with gaming and pop culture. Halo Campaign Evolved 's 5th Main Mission , Assault on the Control Room, contains one Terminal and three Skulls: IWHBYD, Angry, and Cowbell . Below, we'll share details on how you can get each of these Skulls and Terminals, including their chronological order so that you won't miss a single one ! Skull #1: IWHBYD Location Close Your first Skull won't be available until you get the Scorpion Tank, so keep progressing through the mission until it's made available with your Marine allies. Once you have the Tank, take it through the next section where you will eventually come across a bridge in a snowy mountain range. Cross the bridge with the Tank, but immediately head left. You need to park the Tank by the cliff wall and then jump out of the driver's seat. Climb to the top of the Tank, and jump off the cliff to the right to find a small gap that you can stand on, which also contains the Skull. The IWHBYD Skull provides secret dialogue when equipped. Terminal #1: Tangent I Location Close After crossing the bridge and opening up the next set of doors, you can take the Tank through a steep hill and an icy cave. When you come out the other end, you will see a Covenant dropship and a road that splits to the left and right. Take the left path, but watch the right wall. There's a door that you can find on the right that you can access, and once you eradicate the Covenant inside, you can head up the stairs and take an immediate right to find the Terminal waiting for you on the edge. Skull #2: Angry Close Continue through the mission, where you eventually have to abandon the Scorpion Tank because it won't fit into the small cave that the objective tells you to go through. Once you exit the cave and enter the other side, you will see a ramp-like structure (along with plenty of enemies). Climb the third ramp structure to the top, and you will find the Skull in the middle. This structure doesn't require any special jumps or vehicles, as you can just jump up the side and walk up it like a ramp. The Angry Skull will make enemies fire their weapons faster and more frequently. Skull #3: Cowbell Close The final collectible is at the end of the Mission, where you will exit the structure and be tasked with heading for the Halo's Control Room. You'll see two Banshee ships you can enter, but you're going to want to ignore those. Instead, walk forward while hugging the railing on the left until you're facing the large middle structure. If you look down, you'll see a ledge from this middle structure that you can jump down onto. Once you're underneath the structure, the Skull will be waiting for you on a rock. In order to progress through the mission, you're going to have to drop down further and take the stairs back up. Cowbell will reduce the weight of objects, making their physics more easy to displace. Halo: Campaign Evolved Like Follow Followed FPS Science Fiction Shooter Multiplayer Systems Released July 28, 2026 Developer(s) Halo Studios Publisher(s) Microsoft Studios Multiplayer Online Co-Op, Local Co-Op Cross-Platform Play Yes - all platforms 5 Images Close Where to play Close WHERE TO PLAY DIGITAL Genre(s) FPS , Science Fiction , Shooter, Multiplayer Powered by Expand Collapse Close