BATHED IN FLAMES
Enough running! I’ll burn her to the ground right here!
The Evil Within BATHED IN FLAMES – Achievement / Trophy Guide
This is a very hard achievement/trophy to get during your first playthrough. After you completed the game you will get the chance to start a NEW GAME+, which gives you a rocket launcher and a machine gun. With these heavy weapons you will be able to kill Laura quite easily.
The good thing is you don’t have to play all chapters again, you can choose chapter 10 in your 2nd playthrough and only have to play this mission up to the boss fight.