black ice, Hearts of Iron IV mod, detailed textures, military uniforms, soldiers, tanks, snow-covered battlefield, winter, strategy game, cold atmosphere, steel structures, dynamic lighting, realistic reflections, frost patterns, strategic map, intense combat scenes, artillery fire, immersive gameplay, 3/4 view, top-down perspective, ambient occlusion, high contrast, sharp shadows, detailed UI elements, historical accuracy, immersive sound effects, grand strategy, global conflict, World War II setting, advanced technology tree, political intrigue, nation building, resource management.