Resident Evil 7: Back Off, Mrs. B! - Trophy/Achievement Guide

Attack Marguerite using a burner.

Requirements: You must fight Marguerite in the old house and make her flee.

Commentary: Before you try to get this achievement, build a burner first in the old house. You can find its parts next to the save game point by the water (Burner Grip) and in the water station on the east part of the map (Burner Nozzle). Try to get Burner Fuel - you can find it e.g. in the same place where the Crow Key is located. Find Marguerite and start attacking her with the burner. You should have enough fuel to make her push Ethan away and flee. In this moment you will unlock the achievement. Don't forget to heal Ethan.

Important - If you run out of flamer fuel during the attack you don't have to give up, because you can still unlock the achievement. Just switch to the shotgun or the pistol (use enhanced ammo if possible) and keep attacking Marguerite. The only problem with this tactic is that standard firearms won't destroy her bugs that easily so you have to be prepared to receive more damage from their attacks.