Act 3: C2 - Origins

Move up until you hit the video screens, then go right for a memo at the back of this tiny room. Go up to hear the guy again and there is ammo by the window. After the talk, go right and in the back room is a shotgun you may want to swap for the scorcher - depends on whether you want a flamethrower or shotgun.

Go down and take a right. Through the door and turn on the turret system, then turn it off. Go out and into the area and move up to the fork in the hallway up ahead. Go right and on the right wall is a doorway which leads to another memo. Come back and if you look left there is a turret. Of course it will shoot you only if you get caught in the light beam. The turret to the left only guards a frag in the room, if you want it. Otherwise continue right.

The first two rooms on the side have nothing but a scorcher in the first one. This next hall has a turret, so let the light go by and hide bebind the block, then shift over to the next. Then slide into the room and turn off the turret using the switch on the wall.

Go left and in this middle section wait for the wretches to come after you. There are two turrets, flame turrets, in the next room. You can slide around the cover or just move normally and go to the right side. When you are lined up with the doorway at the other end, roadie run under the beams and turn off both.

For the next area, just run to the cover, then get up and quickly come back to kick open the door when the beam is away, go around, and turn off the switch from the other end of the shower room when the beams are not close; I guess you could jump over the cover in the hall and get the switch if you are in that big a hurry.

Go through the next door and out to kill those damned wretches that have been making all the noise. Approach the door on the right with your shotgun ready and slice up the 10 or so wretches that rush you. Go in and at the corner is a turret. You could roadie run into the room, then run back toward the turret and into the tiny room for ammo and to turn off the turret.

In the kitchen you should post up on the first counter area as wretches will busy the turrets that pop up, but be ready to blind fire your shotgun around the corner for beasts that get through. Slide into the upper right corner when the beam is to the left, then you can dive twice to the upper left corner. Turn and face the path and roadie run over then and take cover. The switch is in the hallway, but Dom will just run to you either way; flip it anyway.

Make your way to the room where the video guy talks to you, and to the right is a switch to turn off the turrets. Flip it off, then flip it right back on as wretches will come out of the doorway the turrets guard. Kill the six of them and turn the turrets off. Go into the room behind the switch for a file. The second turrets are easy to navigate around. Ammo behind the wall they are on, then go down the stairs.

When you hit the hallway with a locked door, wretches will bust it open but some will fall to the flamethrowers in the wall. When all is calm, run under the beams. Keep going until you hit a fork, choose left, the control path.

This is more a co-op section as all you do on this side is keep flipping the green switches and the other guy will move along. At the end, go through the door and wait around as the talk goes on. After, head around the lab and into the computer room. Flip the lever to end the chapter.