Killzone 3 Walkthrough - The Reckoning: Part 1
5Full Walkrhtrough: http://www.gamefront.com/killzone-3-walkthrough/
Follow the path and you'll enter the battle above and to the left of the main ISA force. Stop on the high ground here and look for snipers — there are two or three you should peg from a distance.
After the snipers are down, you're free to move up and take a cover position — there's high ground right along the left side of the battlefield. If you take it, look down right in front of it and a little to your left for a trooper who loves to throw grenades right at you.
Once you've secured your area a bit, you should be free to just spray bullets into the battle. Knock out Helghast troops and reinforcements up by where you saw the snipers, and be careful of a few RPG teams right in the middle of the fight. Kill them and the tank will move up.
Be careful as you follow the tank — Helghast artillery joins the fight shortly after, and while the ISA tank will take it out, they'll trade blows before that happens. Afterward, follow the force through the broken gate, following the tank. Go past them for a cutscene with Narville.
Drop into the trench, move to the weapons rack, and grab what you need before continuing. You have the option of a shotgun if you want it.
Around the first corner, you'll see a Helghast on the bridge. Past him are a couple of light troopers and two flamethrower soldiers on the edge of the trench. Take them out from a distance, then rougn the corner and look for a couple more light troopers.
The next bend hides another flamethrower. Kill him and move up and you should only face one or two more regular Helghast before dropping down into a lower portion of the trench, a little further ahead. A cutscene starts just a little further up.
Full Walkrhtrough: http://www.gamefront.com/killzone-3-walkthrough/