1: When you first enter the base, at the first staircase you come to there will be a door on the left side, and inside will be the poster you need to burn. To do so, if you don’t have the torch yet, run back a few rooms to the burning barrel to get a flame and then burn the poster.
2: Once you climb through the vent high atop the wall to enter a room with a large glass wall, grab a lantern off the ground and throw it at the poster under the hole you crawled through.
3: The next poster is just past the enemy where you first receive the machine gun. Once you pass him, make a right and find the poster on the wall there.
4: Once you reach the large room where you get ambushed, go to the small room at the rear to find the poster on the wall.
5: Just before you reach the radio control room, you will be able to find this poster on the right hand side wall in the hallway.
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