post-apocalyptic setting, underground metro tunnels, Moscow, dark atmosphere, dim lighting, gas masks, survival gear, abandoned stations, mutant creatures, eerie shadows, rusted trains, decaying infrastructure, atmospheric effects, dust particles, flashlight beams, armed protagonist, tattered clothing, military-grade weapons, stealth action, tense encounters, claustrophobic spaces, 3/4 view, detailed textures, gritty realism, enhanced graphics redux version, improved lighting redux, reworked character models redux, immersive sound design redux, environmental storytelling, desolate landscapes, survival horror genre, first-person perspective, enhanced visual effects redux.