Act 1: Ashes - 6. Big Momma

BOSS: BERSERKER

Go around the corner and peek into the fires for COG #10.

*Have the Lancer in hand.

Go around the other way and pass the room into the hall. She breaks in through the wall when you try to leave the little hall. Go up, stay in the center of the hall, and dive when she dashes toward you and get out into the next room. Make a dash to the door at the end, turn around, rev up the chainsaw, stay right in front of the door, and then dive when she is right next to you. Move back into the room and lead her out of the doorway, then run through once it is open. Make sure you lead her all the way with you so she doesn't get stuck in an infinite loop with Dom. Go into the next room with a door and do what you did before, just less space. Keep bringing her to avoid the loop and then run into the last room with a door.

Go the the corner on the left of the door and quickly pick up COG #11.

Repeat the luring and get outside.

Go to the left again and search behind the lamp in the corner for COG #12.

Whip out the Hammer and drop it. You will have to dive out of the way when she hears you charging it up, but if you get some space between you two, you should get in a good hit. Just like the Seeders, two hits and she's KIA.