video game, Grand Theft Auto IV, mods, enhanced graphics, realistic textures, custom cars, steam workshop, Liberty City, urban environment, dynamic weather, improved lighting, high-resolution textures, character skins, gameplay tweaks, third-person perspective, action-packed scenes, modded weapons, detailed cityscape, reflective surfaces, shader effects, 3D models, immersive experience, PC gaming, mod community, user-generated content, sandbox gameplay, interactive NPCs, expanded storyline, downloadable content, multiplayer mods, street view, vibrant nightlife, realistic physics, soft shadows, ambient occlusion, detailed interiors, open-world exploration.