Effect: Weapons hold less ammunition.

Location: After Sgt. Johnson orders players to locate the Map Room “on the other side of this wall”, follow his Pelican to another rib structure (similar to the Cartographer’s Room). Stop there and use the rocks to get atop the structure. From atop the structure, locate the Covenant communications array on the ground; that array is near the rib where the skull is. To get on top of the rib, simply use the deployable cover as a stepping stone (place it on the slope) and jump up.

Secure a deployable cover item. Kill the Brutes at the beginning and at the clearing near the Cartographer’s Room and you may find one. Keep it with you! Follow Johnson’s Pelican once you reach the locked entrance (you can see Johnson’s Pelican disappearing around the rock). The skull is on one of those support butresses in the distance. Go under the support arcade and locate a suitable piece of rock to reach the top. Once on top, locate the support near the Covenant antennae. That’ll be the spar where the skull will be. Use the deployable cover item you’ve been saving up on the slope. Hop onto the blue forcefield and again to reach the skull.