two characters, Chell and Atlas, cooperative gameplay, split-screen view, Portal 2 environment, advanced portal gun, futuristic white laboratory, complex puzzles, companion cubes, energy balls, laser beams, emancipation grills, blue and orange portals, dynamic duo, teamwork action, high-tech panels, robotic arms, Aperture Science logo, soft ambient lighting, 3/4 perspective, detailed textures, metallic surfaces, glowing interface, interactive elements, science fiction atmosphere, co-op platforming, intricate level design, LED lights, immersive experience, split dynamic composition.