Win 1: with a shotgun. guy was on the mountain, fell down, rushed him and won.
Win 2: can't remember it, but also with semi auto shotgun.
Win 3: also with semi auto shotgun. was hiding under weird base with a roof. saw them fighting across the field. when one killed the other, rushed the winner and got him.
Win 4: guy was in a fort. chopped it down. he fell into the storm and I won.