Superior Firepower Other
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!
- The Army's Metal Gear REX, a standard Humongous Mecha that used a railgun as a launching mechanism, enabling it to launch a virtually undetectable nuclear warheadnote , from any kind of ground on earth, to any kind of ground on earth. Metal Gear Solid features its prototype; by the time of Metal Gear Solid 2, the plans have been sold on the black market and almost everyone has one. REX's railgun and the insane firepower it carried later become a plot point in Metal Gear Solid 4.
- The Marines' Metal Gear RAY, an amphibious Humongous Mecha not armed with nuclear weapons, and was actually designed to help combat the proliferation of REXes. (According to a character in a later game, RAY's lack of nuclear armament takes it out of the "Metal Gear" category.) RAY was put into full production, unlike all the other examples here. Earlier models (possibly the prototype) have a cockpit for a single pilot, whilst later ones are remotely controlled by an AI. RAY is equipped with machine guns, missile tubes and a "hydro cutter," a high-pressure water beam able to cut through steel.
- The Navy's Arsenal Gear, an insanely huge submarine. Only the prototype was ever completed (2 if you include Outer Haven). It contains not only a nuclear arsenal but significant Electronic Warfare and data command equipment, and is manned by an advanced AI. However, it's the size of Manhattan, and needs a platoon of 25 RAY units to guard it.
- While not actually a Metal Gear, the "captured Russian design" should be acknowledged here: the Shagohod, whose sole prototype was created in 1964. It lacks the bipedal nature of the Metal Gears, but does include the stealthy nuke: it is equipped with not only a single IRBM but two rocket boosters which accelerate the Shagohod itself to 300 MPH, allowing it to act as the first stage of a multi-stage missile. Of course, it needs about three miles of flat terrain to do this from, but there are a fair number of places in the world with three miles of flat terrain.
- Likely based on the rumored-but-never-declassified Minuteman system, which consisted of a shooter, a spotter, a shovel, a lead sheet, and a nuclear bazooka.