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 comes to end everything. Collects the complete six issue series Unicron and all of the backup short stories featuring Rom, G.I. JOE, Mobile Armored Strike Kommand, Micronauts, and Visionaries. Also features a full cover gallery and interviews from creators spanning the history of IDW's Transformers comics.