video game, Grand Theft Auto IV, modding, Steam platform, realistic graphics, enhanced textures, custom skins, improved lighting, shader effects, high-resolution, detailed cityscape, Liberty City, dynamic weather, character customization, vehicle mods, gameplay tweaks, third-person perspective, action-packed, urban environment, skyscrapers, bustling streets, interactive NPCs, modded interface, user-generated content, community-driven, immersive experience, sandbox gameplay, open-world exploration, PC gaming, mod tools, Steam Workshop integration.