Level 5: Assault on the Control Room

Finding Active Camouflage 1: Right before you head down that slope into the big cave in the middle of the level, look off to your right. You'll see some crates; the first Active Camouflage is tucked away behind them. You'll find this just after you get the Scorpion tank, so keep an eye out!

Finding Active Camouflage 2: After you exit the cave and start the "Rolling Thunder" segment, stick to the right side. You'll spot a Ghost, some health and ammo, and a Covenant turret up on a slope. To the left of that turret is a door. Head inside that door, and you'll enter a larger room with a couple of poles. The second Active Camouflage is hidden in this area. Be ready, because as soon as you pass that door, some Covenant enemies are going to come out!

Finding Active Camouflage 3: Keep pushing through the level until you reach the next group of marines, who are chilling at the bottom of a cliff. Just past them, you'll encounter some Hunters and the entrance to the next section. There are several pillars right in front of this entrance. Look to the left of those pillars; you'll find health, ammo, and the third Active Camouflage.

Finding Active Camouflage 4: From where you found the last camo, keep moving forward until you enter the next area. You'll need to work your way up and through some dual bridges. After you've crossed those bridges, you'll eventually come to a hallway filled with invisible Elites. This hallway has a passage on the left side as you're moving forward. Inside this passage, there are a few poles sticking out of the wall. The fourth and final Active Camouflage is hidden behind one of these poles. It's pretty easy to miss, so make sure you check carefully!