S - As you head forward the first alley on your right hand side, you may need to get on top of the awning to see it.

M - In the open area where all the Dongo's and Chryatis' attack you, on the right hand side there will be a building, anchor on it's corner and the M mark will be on top of the building, you will have to anchor jump and shoot
it, so I suggest using the Shotgun.

T - When heading to the building where you have to anchor your way to the top there will be a tower with a Snow Pirate on it, do not destroy the tower. Anchor up there and look towards the building corner and you can see it.

R - When you are the bridge you will come to a spot with two trains leaned up making an arch. You will need to get on the one that you first come to, go to the the very top and look to your left below the bridge on one of the buildings far below. You will need the Rifle to get it from here, what I suggest to do is run forward, grab the Rifle, run back and get the mark.

O - Before you go up to the door to fight the boss, go to your far far right and look at the top of the wall, it will be up there.