Ratchet & Clank have done it all. They've saved countless planets from dreadful doom and have managed to earn intergalactic mega-celebrity status in the process, and they're going to take advantage of it! As they head off for some long overdue rest and relaxation, Ratchet is plagued by thoughts of his mysterious past. He's not the only one, though - Emperor Percival Tachyon is also interested in Ratchet, and wants to wipe every last Lombax from the universe. Tachyon's forces ambush Ratchet and Clank in their home galaxy, and our heroes are once again forced to save innumerable innocents. They steal an imperial warship and embark on an explosive adventure bigger than they (or you) have ever seen before.