video game environment, Black Mesa Research Facility, Half-Life series, abandoned laboratory, dark corridors, flickering fluorescent lights, scattered papers, broken equipment, rusted metal surfaces, concrete walls, hazard signs, emergency lighting, ventilation shafts, alien residue, security checkpoints, control panels, 3/4 view, atmospheric lighting, detailed textures, realistic materials, wide-angle lens, desolate atmosphere, science fiction theme, action pose, crowbar, HEV suit, Gordon Freeman, headcrab, immersive composition.