The fictional, the portable, the unclear or any combination of the previous. * The Vindicator from Fail-Safe- seems to have a combination of the B-52's defences and range with the B-58's speed and exterior. * The Alaska class guided missile battlecruiser- created for Harpoon II for the designers test weapons and sensors, then shipped with the game. Nuclear-powered as well. Even has a picture! Entirely fictional nuclear-armed Humongous Mecha from the Metal Gear Solid universe. American Metal Gears were actually re-engineered from captured Russian designs, and included: