[[caption-width-right:276:Lt. Solid Snake is a martial arts expert. He destroyed Metal Gear 1 and is now the leader of Operation 747.]]
'''''Snake's Revenge''''' is an alternate sequel to the original ''VideoGame/MetalGear'' released exclusively for the NintendoEntertainmentSystem in 1990. It was the first ''Franchise/MetalGear'' sequel made by {{Konami}}, produced without the involvement or consent of the original game's creator, HideoKojima and in response to the success of the NES version of ''Metal Gear'' in the overseas market. Despite Kojima's lack of involvement, the existence of ''Snake's Revenge'' would inspire Kojima to design his own sequel to his game, resulting in the creation of ''[[VideoGame/MetalGear2SolidSnake Metal Gear 2: Solid Snake]]'', relegating ''Snake's Revenge'' to non-canon status.

Three years after the Outer Heaven incident, FOXHOUND has learned that a nameless hostile nation has obtained the plans for Metal Gear. Solid Snake is called back into action to infiltrate the enemy territory. With the help of two new FOXHOUND members, weapons expert Nick Myer and infiltration specialist John Turner, as well as a double agent named Jennifer, Snake learns that the enemy have not only mass-produced the original Metal Gear model, but are now testing a new upgraded prototype called "Metal Gear 2."

''Snake's Revenge'' is pretty similar to the original ''Metal Gear'' in terms of game design, although it is much closer to the original [=MSX2=] version than the NES version. This time Snake has an option to switch between his punches or using a knife for close-range attacks (the latter allows him to kill enemies in one stab). In addition to the regular overhead areas, ''Snake's Revenge'' also feature several side-view segments akin to Konami's own ''RushNAttack''.

!! Snake's Revenge features examples of:
* AlternateContinuity: Although, it wasn't intended to be one at first.
* AttractMode: A diagram of Metal Gear 1's specifications.
* BlackDudeDiesFirst: [[spoiler:Inverted. Nick Myer is actually the last of Snake's support team to actually die, which is way late in the game, assuming that John Turner had died.]]
* CableCarActionSequence: The last few buildings prior to reaching the final fortress forces Snake to ride a series of cable-cars to get into places.
* CanonDiscontinuity: Thanks to Kojima actually making his own version of ''Metal Gear 2''.
* TheKeyIsBehindTheLock: The keycard that opens the entrance to the first base is inside the base itself. [[spoiler:As a result, the only way Snake can infiltrate the base is by using an ally as a decoy.]]
* LocomotiveLevel
* MissionControl: Averted. Snake's radio contacts consists of two other field agents (John and Nick), a double agent in the enemy's main base (Jennifer), and the nameless helicopter pilot who drops him off at the beginning of his mission.
* MissionPackSequel: Outside the all-new graphics and the addition of side-view segments, the play mechanics are not that much different from the first game. However, certain elements from the original [=MSX2=] version that were not carried over to the NES port, such as the higher (double exclamation mark) alert phase and the ability to procure ammo and rations by punching guards in stealth mode, has been restored here.
* OneWingedAngel: After Big Boss' initial form is defeated, he transforms into a cybernetic behemoth who claims that he has no weak points. It is also to be noted that this is the only ''Metal Gear'' game period to utilize this (unless one counts Colonel Volgin merging with the Shagohod's wiring or Peace Walker transforming into a quadruped).
* OvertookTheManga: ''Snake's Revenge'' was made before the Kojima's own [=MSX2=] sequel and takes the game's plot into a different direction that makes both games irreconcilable with each other.
* ReverseMole: Jennifer ("Your Person") is helping out Snake from inside the enemy's base. [[spoiler:Her cover is blown and she is [[DistressedDamsel captured]] by Big Boss just before the final battle.]]
* RevengeOfTheSequel: The game's title makes little sense, considering it is [[spoiler:Big Boss who wants revenge against Snake for turning him into a cyborg.]]
** [[spoiler:Though in the end, it still makes sense, due to the development that Big Boss used to be called Naked Snake, which we can still assume to be canon to that universe, so technically it is "Naked Snake's Revenge".]]
* SuspiciouslySpecificDenial: At one point, a captured ally tells Snake via radio that his present area has no enemies or traps. [[spoiler:He turns out to be an enemy spy.]]
* TokenMinority: Nick is the only black guy among Snake's support crew.
* UnexpectedGameplayChange: The side-view segments.
* TheVeryDefinitelyFinalDungeon: The enemy's headquarters is a large medieval castle, a huge contrast to the military bases, vehicles, and outdoor environments that the player infiltrates prior to that point.
* WhatHappenedToTheMouse: [[spoiler:The real John Turner is never seen again after Snake defeats his impersonator. He is declared MIA in the ending, so it is left ambiguous whether he was killed or kept alive, or whether there was even a real John to begin with.]]
* YourPrincessIsInAnotherCastle: Snake succeeds in sinking the enemy's shipment of Metal Gears only to find out that the enemy have already completed the prototype for the new model, Metal Gear 2, in their headquarters.