Orbital Skull
- Load the Orbital map in Forge mode.
- Turn slightly right and walk to the bay door marked "Authorized Personnel Only". Go through.
- Before reaching the stairs at the end of the hallway, turn left and head into the adjacent hallway.
- Turn right and walk past the crates, towards the empty shaft. You'll recognize it by the yellow-and-black striped warning rails.
- Standing next to the shaft, look at the ceiling. You'll notice two platforms jutting out of the wall.
- Transform into the sentry (hit up on your D-pad) and fly towards the highest platform.
- You need to get the skull in regular form, and you need a place to stand in regular form, so locate the tiny section of open platform on the right side.
- Once in regular form, crouch, move forward along the edge of the platform and hold RB to grab the skull.
