Metal Gear 2 (weapon)

Metal Gear 2 was an upgraded version of the TX-55 (referred to as Metal Gear 1 and Metal Gear VRC-4 in-game) that Solid Snake had destroyed during Operation Intrude N313 in the non-canonical game Snake's Revenge.

History
Some time before the events of the game, the unnamed enemy nation that Big Boss (who became a cyborg as a result of his defeat at the hands of Solid Snake) had taken control of developed an upgraded version of the TX-55. It was apparently seven times as strong as TX-55, going by what enemy personnel had stated. Shortly after Big Boss met his final end, Metal Gear 2 was activated, and was set to fire on New York City, Tokyo, and Moscow as its first targets. However, Solid Snake (known as Lt. Snake in this game) had managed to destroy the Metal Gear using remotely guided missiles before it could launch its nuclear weapons.