Killzone 3 Walkthrough - Stahl Arms Infiltration: Part 2
9Full Walkthrough: http://www.gamefront.com/killzone-3-walkthrough/
As soon as the cutscene ends, pull the trigger and charge the arc cannon you picked up from the execution. Let it fly at the door ahead of you as Helghast troops start to come in, and you'll liquefy a few of them. Repeat the process for the second wave.
TROPHY: Going forward, anytime you see a pane of glass, break it. Some of the panes are bulletproof, but if you shatter all the shatter-able pieces of glass, your reward will be the "Shattered" Trophy.
Switch guns and grab ammo from the dump to your right, then head for the door. A couple more troopers will be coming toward the door. Drop them and get to cover, switching to the arc gun and charging it. Fire a shot toward the back of the room at the guys dug in there, and also to the back left corner, through the small control room on the left.
Watch out for capture troops (the guys with knives) as you fight through this room. If you fired good shots with the arc cannon and you kill those capture guys, you shouldn't struggle too hard with the mop up. When you're done, cross to the far side and continue out of the labs. Climb the stairs for another cutscene.
Keep moving. You'll come out into a big lab area. This is another place where you can break a ton of glass, but your goal is to push to the far end of the room. Inside the first little alcove, on the right as you enter, is an ammo dump — so make heavy use of your arc cannon.
Stay down and move forward carefully. The front portion of the lab is filled with openings and side chambers where Helghast are hiding, and they can get a lot of good angles on you. They'll also be on the upper floor just ahead.
You'll fight through several waves, so don't put yourself in danger for Rico's sake, for example. He has a tendency to go out and get shot down, so only revive him when you feel confident you can get to him without getting shot up. Make clearing the upper floor a priority, as those guys will fire on you with impunity until they're dead.
Once you're clear to move, keep pushing toward the door at the far end of the lab. When you get there, you'll find an ammo dump, but you'll also have to defend the position against Helghast coming from where you just were. Watch the balcony again, and make use of your unlimited ammo for the arc cannon.
You should do okay if you just stay down and try to take out large groups of Helghast with grenades and arc whenever possible. If you can clear the balcony early, you'll have an easier time mopping up the ground forces.
TROPHY: The "Frazzle Dazzle" Trophy unlocks if you can take out three Helghast with a single shot of the arc cannon. If you can't do it in the labs, try it again in the factory — specifically against jetpackers.
Keep fighting away until the Helghast are defeated and you can go through the door. Don't advance until you finish destroying all the glass, if you're going for the "Shattered" Trophy. A cutscene triggers once you're in the mainframe room.
Full Walkthrough: http://www.gamefront.com/killzone-3-walkthrough/