To get the Snow Cleaver play on horde as this only works in horde, buy the "Fire" spawn command post and the "Monument" command post, then head over to the farthest point possible in the "Train" spawn, stand in the corner and look very far out, up and left, you should see a small walkay between two buildings up high, the first snow man is in the farthest doorway on the walkway, shoot the snow man (you'll know if you hit it, it'll explode into smoke) in the doorway, then go to the "Monument" area and look to the back of it into the building, look at the second-to-left window, back up so you can see the second snow man in the window, (it's quite far back so just keep looking) shoot it, then go to the "Fire" spawn again and look far out like the first, look on the ground near the second tree