An underground military bunker half-buried in rubble and overgrowth, created in Unreal Engine. The reinforced steel blast doors are scarred with bullet holes and rust. Broken concrete walls are overtaken by vines and moss, while debris and abandoned vehicles litter the entrance. Flickering warning lights cast a dim red glow across the scene. The textures emphasize cracked concrete, rusted metal, and overgrown foliage. The atmosphere conveys survival, tension, and forgotten wars.