best quality, high resolution, realistic style, post-apocalyptic, abandoned, eerie, dark atmosphere, underground, rugged and worn-out surfaces, flickering light, ominous shadows, dust particles floating in the air, survival essentials, rusted metal, pipes, concrete, 1-2 characters, dusty and ragged clothing, gas masks, wielding weapons, tense and wary expression, exploring the labyrinthine bunker, searching for signs of life or danger.