In this video guide I will show you an early spot in the game where you can kill a demon with fire. The spot where I did this at was near a gas station and a bridge in the distance. I apologize for not showing where I was on the map. What I used was a molotov, once the demon came flying down at me I threw it in its face for a one hit kill, that's all it should take anyway. Another area to get this really easy is when you are getting the teddy bear for the little girl. Once you reach the top of the grain bin there will be one sleeping in the nest. Just take out the molotov and throw it at it for an easy achievement.