cooperative gameplay, Dead Space 3, two players, online multiplayer, split-screen, Isaac Clarke, John Carver, space suits, futuristic weapons, necromorphs, strategic dismemberment, teamwork, voice communication, resource sharing, puzzle solving, side missions, unique character perspectives, horror atmosphere, spaceship setting, ice planet Tau Volantis, dynamic lighting, 3rd person shooter, action-horror genre, intense combat, survival elements, crafting system, weapon upgrades, high-resolution textures, immersive sound design, co-op specific cutscenes.