Gordon Freeman, Half-Life 2 Episode 1, HEV suit, crowbar, action pose, fighting, Combine soldiers, dystopian City 17, destroyed buildings, alien technology, headcrab, Alyx Vance, sidekick, urban warfare, resistance movement, dark atmosphere, firefights, physics-based puzzles, gravity gun, intense facial expressions, dynamic lighting, mid-action shot, detailed textures, immersive environment, science fiction, post-apocalyptic, cinematic angle, high contrast lighting, debris, smoke effects, panoramic view.