Well, time to get the hell out of dodge. Follow your crew. When you’re in a hall with wind blowing, look to your right, and shoot the canister to restore some stability.
When you reach two doors that can both open, open the one on the right first, marked Armory, to find an Incinerator. Fancy!
Take out the wave of soldiers, and look for a small room on the right to find some armor.
After you wait for a door to open, a few guys will appear across some cover. Be careful with your fire, there’s an explosive tank right between you!
Keep following the marker and your team to the elevator. The enemies come gradually enough that there’s no real tough choke point or big conflict.
After you cut open a door, there will be xenos and marines in equal amounts. They will hurt each other, but it’s up to you to finish them off. If you’re not careful, you can fall down to the lower level. It won’t hurt, but the xenos down there will. There is an elevator platform back near where you entered, it’s yellow, and it’ll get you back up top.
After another similar room, you’ll enter a control room where you have to activate a computer. In the section after, in case it doesn’t go without saying, go slow. Fog will cover the xenos, and they’ll come from all over.
You’ll drop into the water beneath the area, and find a path around the obstruction. Hang to the right, the left is a dead end.
The path is clear, and just look for choke points and keep an eye on your motion tracker. There’s plenty of level to cover, but none of it is very complicated.
When you reach the hangar for evac, there will be no xenos, but a LOT of bad marines to face down, including armored ones. They can swarm you quickly. Head up to the catwalks, and run to the point indicated. You’ll be redirected before you get there.
Essentially, you need to reach the control booth that is up and to the right of where you entered the hangar. After you’ve activated the two releases, do nothing but RUN to the dropship as xenos will flood the hangar.