NON-BELIEVER BANNER 1/5
Coordinates: [712443; 3416287]
Note: In the room to the left of where you run into two guards standing next to an explosive barrel. The Banner has to be ignited, so look around for a burning barrel in order to light your torch (reward: 10 XP).
NON-BELIEVER BANNER 2/5
Coordinates: [712457; 3416286]
Note: In the large room Lara enters after killing the single guard and squeezing through a hole in the wall. To ignite the Banner, use one of the oil lamps (reward: 10 XP).
NON-BELIEVER BANNER 3/5
Coordinates: [712458; 3416298]
Note: In the room with the wounded enemy that Lara takes the submachine gun from. Same as before, you first need to light your torch, but luckily, after the gas explosion the game unlocks a passage to one of the initial rooms in the bunker where you can find a burning barrel (reward: 10 XP).
NON-BELIEVER BANNER 4/5
Coordinates: [712432; 3416299]
Note: In a sideway area of the large room in which Lara has been ambushed. Same with the previous banner, you need to backtrack to the beginning of the bunker and use the fire from the burning barrel (reward: 10 XP).
NON-BELIEVER BANNER 5/5
Coordinates: [712433; 3416288]
Note: On the wall in the communications room (you'll find a burning barrel in the nearby corridor) (reward: 150 XP).