Although Im not on the game and looking at the coordinates there is always a way in near the bunker…I only had to find a way in one which was by a jeep..but there is a passage way up a little if this is the one. Other than that Kratos it is always close by just look for dark areas in the map that could be a tunnel
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COD: Ghosts DLC boosting
Do not go where the path may lead, go instead where there is no path and make a trail.
~Ralph Waldo Emerson~