Battle at the Steamboat Complete (20) GS
Progress through the 'Battle at the Steamboat' level on any difficulty


Hollister happens to be on the sticks in one of the gaps between the rocks on the right. (Leaving an unlit dynamite stick there also keeps him back) Stand behind the rock just in front of the boat and get the rifle crosshair over him. Use the D-Pad right to bob in and out of cover. When he fires, it takes him a couple of seconds to reload, while he does this, lean out and take a shot. Drop back into cover, he'll take another shot, rinse, repeat.