Snake's Revenge is a stealth action game developed by Konami for the Nintendo Entertainment System. It was released in North America in April 1990 (under the Ultra Games label) and in Europe on March 26, 1992 (under the Konami label).
Snake's Revenge was never released in Japan, despite the fact it was developed there, although the differently colored titles between various releases implied that a Japanese release may have been planned. Although it was the only Metal Gear game to have been developed in Japan exclusively for Western releases, it was not the only Konami-made game to undergo this, as Konami had previously done this for licensed titles such as RollerGames or Mission: Impossible. The game was first indicated in 1989 as an upcoming game alongside Mission: Impossible with the Ultra Games promotional pamphlet 10 Ways to Stay Zap Happy, with it being given an ETA of Early Spring of 1990.
It was made as a direct sequel to the NES version of the original Metal Gear. Snake's Revenge was the first game in the Metal Gear series made without the involvement of creator Hideo Kojima, although members of the development team previously worked with Kojima on the original MSX2 version of Metal Gear. It is not part of the series' canon.
The game doesn't have the words "Metal Gear" on its title, but certain publications at the time, such as Nintendo's Top Secrets Passwords guidebook, has the game listed as Snake's Revenge: Metal Gear II.