video game concept art, Half-Life Resurgence, futuristic dystopian cityscape, Combine architecture, headcrab zombies, Gordon Freeman in HEV suit, crowbar action pose, Vortigaunt ally, Xen flora, City 17, Strider battle, Resistance fighters, urban decay, atmospheric haze, dramatic lighting, wide-angle shot, detailed textures, gritty realism, advanced alien technology, immersive environment, dynamic shadows, intense firefight, high contrast, panoramic view.