Getting to the Exit (5)

Launch Pad: First things first, get out of that rocket and head back down to ground level. You'll find a small room near the entrance to the launch pad. It's got two Pig Cops in it, but don't sweat 'em – they're not much of a threat. Toss a Pipebomb to deal with them easily and grab the Steroids, Holoduke, and Shotgun Shells inside. Then, hit that new switch in the room. Boom! The rocket is toast.

Underneath the Launch Pad: Now, take the elevator down next to where the rocket used to be. Follow the hallway until you reach a computer room. Watch out, there are a bunch of Captains in here just waiting to become Chaingun Cannon targets. Look for a column in the room with three packs of Shotgun Shells around it. You'll also find Protective Boots sitting on the big computer.

SECRET 4: Don't forget to interact with that big computer! Pressing it will reveal three Atomic Healths. Score!

The Sewer: After grabbing the boots, press the switch near the big computer. This opens up the sewer entrance. The new hallway you enter is crawling with Troopers – perfect targets for your Chaingun Cannon. Once you get into the sewers themselves, you'll encounter plenty of Octabrains. The current is moving super fast, so honestly, you can just let it sweep you along if you want to skip the fight. You won't miss any items this way. Just ride the current to the end, and the exit will be right there.