Killzone 3 Walkthrough - Interception: Part 2
Full Walkrhtrough: http://www.gamefront.com/killzone-3-walkthrough/
The airlock triggers a cutscene. When you come out of it, you'll have more spiders to kill as you advance into another tunnel. Keep moving forward and taking out Helghast — as usual — until the gravity gets knocked out.
As soon as you lose gravity, start looking for sentries and drop them. You'll have some moon-jumping capabilities while the gravity is out, so you can fairly easily move to higher ground if you want. Use it to your advantage — get up high and kill off the upper-level Helghast, then use the high ground to punish the guys fightin Rico and Narville.
The fighting doesn't amount to doing more than killing guys and moving forward. Use cover and your space jump ability to avoid grenades and other brands of death as you make your way to the platform at the back of the tunnel, where you can turn gravity back on.
Now head sideways into the offshoot tunnel. Watch for RPG crews on either side on the second floor as you enter the connecting area. They're death triggers the elevator on the left to descend, which is filled with Helghast. Get a grenade ready.
A second later, the right elevator comes down — it contains only a Heavy, which is bad enough. Knock him out by shooting him the head, then hitting his power pack. Board the elevator when you've finished him.
The top of the elevator sees more spiders. Blast them and get moving across the destroyed walkways. Keep moving until you hit a small detachment of Helghast — your LMG should annihilate them — and advance to the airlock beyond.
Full Walkrhtrough: http://www.gamefront.com/killzone-3-walkthrough/