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 Transformers: Unicron and all of the backup short stories featuring Rom, G.I. JOE, M.A.S.K.: 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.