stalker armed with gun sneaking in dark catacombs

abandoned apocalypse apocalyptic armageddon biohazard bunker cataclysm catacomb catastrophe collector creature danger darkness disaster doomsday dungeon fallout firearm frightening gas gun human mask mine monster mutant nuclear poisonous pollution post postap postapoc protection radiation rags rubbish scary sewage sneaking stalker survival survived survivor tattered tatters toxic tunnel underground weapon