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The end is nigh! Unicron, a planet-sized being that devours other worlds, has set its sights on Cybertron and all of its colonies - including Earth! Optimus Prime, Bumblebee, and their friends must unite every Cybertronian, Earthling, and ally they have to stand against this threat to all existence. But why is Unicron hell-bent on destroying Cybertron - what original sin did Optimus Prime's ancestors commit to earn this wrath? It's an all-out battle against extinction as the world-destroying, universe-shattering threat of Unicron is on its way.