2 0 0Actions Report Solution This is for killing the first boss, Stinger. This one is easy enough, as he seems to go into an exploitable pattern each time you successfully hit him. The scorpion's weak point is his head. Move forward a little bit so the camera angle changes, then take a shot to damage him. He'll cover his head and back up a bit, then immediately come back at you with his head exposed. Just repeat this cycle until he's dead.
1 0 0Actions Report Solution Did it with the knife on hard without taking damage,..If you do this you will get the Guns are Too Quick Trophy too.