Gordon Freeman, protagonist, HEV suit, crowbar, futuristic, dystopian cityscape, Combine architecture, headcrab, Vortigaunt ally, action pose, fighting stance, intense expression, detailed facial hair, physics-based puzzles, gravity gun, Xen creatures, dark corridors, eerie lighting, atmospheric, high contrast shadows, first-person perspective, immersive environment, decaying urban structures, advanced alien technology, interactive objects, dynamic lighting, panoramic view, science fiction, post-apocalyptic, Valve, iconic logo, crowbar in hand, mid-action, detailed textures, environmental storytelling, suspenseful mood.