Space Marine, power armor, bolter gun, chainsword, grimdark aesthetic, futuristic battlefield, war-torn cityscape, alien monsters, Orks, Tyranids, Chaos Space Marines, Imperial Guard allies, dynamic action pose, mid-battle, explosions, debris, sci-fi architecture, gothic structures, dramatic lighting, high contrast, 3/4 view, cinematic angle, detailed textures, metallic surfaces, weathering effects, energy glow, HUD interface elements, interactive environment, multiplayer, co-op gameplay, Xbox controller, immersive sound effects, epic orchestral soundtrack.