Originally Posted by Wullsterino
Just wanted to clarify a point about the Heartbreaker achievement - only the killing blow needs to be to the heart. I just got after an allied Mosquito hit him, I hit him in the back with 7-8 Hail-Fire rounds, set him on fire and finally switched to the carbine and hit him in the face. Just as he jumped, his heart came into my line of fire and the achievement popped before he hit the ground!
i'm not sure how you did it but to trial and error this method i just did this after a specific point in the story where there is only a handyman, i loaded the checkpoint 5 times to no avail. I think you got some fluke luck.