Metal Gear 2: Solid Snake is an overhead action-adventure stealth video game, taglined as a "Tactical Espionage Game", that was originally released by Konami in 1990 for the MSX2 computer platform. The game was designed and written by Hideo Kojima, who also designed the MSX2 version of the original Metal Gear. Due to the declining support for the MSX platform by the time of its production, Metal Gear 2 was initially released only in Japan - instead an earlier produced NES game titled Snake's Revenge served as the Metal Gear sequel in North America and Europe. However, Kojima would continue the series years later with Metal Gear Solid, which follows Metal Gear 2 and features an in-game plot summary of its events. An English version of Metal Gear 2 have since been included in certain releases of Metal Gear Solid 3: Subsistence for the PlayStation 2, as well its HD Edition released for PlayStation 3, Xbox 360 and PlayStation Vita. The game was also re-released in Japan as a digital download for mobile phones and the Wii Virtual Console.

Set in 1999, a few years after the events of the original game, Solid Snake must infiltrate a heavily defended territory known as Zanzibar Land to rescue a kidnapped scientist and destroy the revised Metal Gear D. The game significantly evolved the stealth-based game system of its predecessor "in almost every way", introduced a complex storyline dealing with themes such as the nature of warfare and nuclear proliferation, and is considered "one of the best 8 bit games ever made."

Metal Gear (Japanese: メタルギア, Hepburn: Metaru Gia) is a series of action-adventure stealth video games, created by Hideo Kojima and developed and published by Konami. The first game, Metal Gear, was released in 1987 for the MSX2 home computer architecture. The player takes control of a special forces operative (usually Solid Snake or his father, Big Boss) who is assigned to find the titular superweapon "Metal Gear", a bipedal walking tank with the ability to launch nuclear weapons. Several sequels have been released for multiple consoles after requests from Konami to produce new Metal Gear games. The sequels expand the original game's plot adding new characters opposing and supporting Snake, while there have also been a few prequels exploring the origins of the Metal Gear and recurring characters. Various parts were inspired by Hollywood films with character's names, settings and artworks often referencing them.

Other notable traits are cinematic cutscenes, intricate storylines, offbeat and fourth wall humor, and exploration of political and philosophical themes, with references to Hollywood films to add flavor. As of March 2015, 41.2 million copies of the game franchise have been sold worldwide, with individual installments having been critically and commercially acclaimed and having received several awards. The franchise has also been adapted into other media such as comics, novels, and drama CDs. Snake also appeared as a guest character in Super Smash Bros. Brawl.

Mappy (マッピー, Mappī) is an arcade game by Namco. First introduced in 1983, it was distributed in the United States by Bally/Midway. Mappy is a side-scrolling platform game that features cartoon-like animals, primarily cats and mice. The game's main character itself is a mouse. Mappy runs on Namco Super Pac-Man hardware, modified to support horizontal scrolling. The name "Mappy" is likely derived from mappo, a Japanese (slightly pejorative) slang term for a policeman.

Magical Tree (マジカル ツリー, Majikaru tsurī) is a vertically scrolling platform game developed by Konami for the MSX home computer, and published in 1984. Konami published a Brazilian Portuguese version, Árvore Mágica, in 1985.

Konami included Magical Tree in the 1998 game anthology Konami Antiques MSX Collection, Vol. 2 for PlayStation.