Killzone 3 Walkthrough - Evacuation Orders: Part 3
3Full Walkthrough: http://www.gamefront.com/killzone-3-walkthrough/
Follow the ISA forces forward and watch for RPG gunners. You'll see troops up on the buildings to the right and the overpass just beyond. Shoot the red barrels on the overpass to blow them and clear the RPGs.
Move up carefully and take out the entrenched Helghast, watching for handy missile launchers as you go. You'll need to clear the bridge forward so the armor can move up. Take cover facing the building to the left and hit it with missiles if you have them to take out lots of enemies at once.
There's not a whole lot of strategy left here. Move up slowly and take cover to avoid getting blasted, and watch for Helghast RPG teams. You'll see them amassing in the back left corner as you near the end of the bridge — hit them with a grenade.
You should do just fine. Mop up the last of the enemies to end the chapter.
TROPHY: The "Time for a Dip" Trophy is unlocked when you hit the river.
Full Walkthrough: http://www.gamefront.com/killzone-3-walkthrough/