Dead Space 2 - Beat Final Boss in 1m 40s on Normal Guide

I beat the final boss in about 1 minute 40 seconds on Normal difficulty, heres how... At the beginning of Chapter 15, max out your Line Gun by respecing one of your other weapons. The Line Gun is the only weapon you need to beat the last boss. Stock up on a couple health packs to keep you alive while you run through the level. There is a save point before the last fight, I created a new save here and kept an old save for the beginning of the level where the store was. Last boss is cake, start by alt firing the Line Gun at her. The marker opens up and alt fire 2 shots at it. The marker will close and she will reappear. Alt fire a shot at her and run around a long rock wall to avoid the pack as best as you can. The marker opens up, fire another 2 shots at it. Rinse and repeat.