post-apocalyptic setting, Moscow metro, dark tunnels, mutant creatures, survival horror, first-person shooter, atmospheric lighting, gas mask usage, scarce ammunition, immersive story, Russian voice-over, stealth gameplay, dilapidated stations, eerie soundtrack, moral choices, radiation hazards, NPC interactions, claustrophobic environments, weapon customization, flashlight illumination, intense combat, 3/4 view, detailed textures, gritty realism, dynamic shadows, underground society, faction warfare, psychological tension, environmental storytelling, desolate landscapes, abandoned trains, ghostly apparitions, survival mechanics, resource management, narrative-driven, high-stakes encounters, atmospheric pressure effects, grimy surfaces, decaying infrastructure.