Metal Slug 4 (メタルスラッグ4) is a run and gun video game for the Neo-Geo console/arcade platform created by SNK. It was released in 2002 for the MVS arcade platform and the AES game console, and is the fourth game in the Metal Slug series. Two years later, Playmore published Metal Slug 4. This was also the only Metal Slug game that was produced during SNK's bankruptcy, until its sequel was released after SNK was "resurrected" as SNK Playmore.

Metal Slug 4 retains the same gameplay as previous titles, with the addition of some new enemies, bosses, weapons, several new vehicles and a new bonus combo system. It was later ported to Microsoft Xbox (not compatible with Xbox 360) and Sony PlayStation 2 as a stand-alone game in Japan and Europe, and along with Metal Slug 5 as a compilation in North America and South Korea.

Super Vehicle-001: Metal Slug (メタルスラッグ, Metaru Suraggu), more commonly known as simply Metal Slug, is a run and gun video game developed and originally released by Nazca Corporation and later published by SNK. It was originally released in 1996 for the Neo Geo MVS arcade platform. The game is widely known for its sense of humor, fluid hand-drawn animation, and fast paced two-player action. It is the first title in the Metal Slug series. It has been ported to the Neo Geo AES, Neo Geo CD, Sega Saturn, PlayStation, Virtual Console, PlayStation Network, iOS, Android and Neo Geo X, and to the Wii, PlayStation Portable and PlayStation 2 (as part of the Metal Slug Anthology).

Metal Slug 2: Super Vehicle-001/II (メタルスラッグ2), more commonly known as simply Metal Slug 2, is a run and gun video game developed by SNK. It was originally released in 1998 for the Neo-Geo MVS arcade platform as the sequel to the popular 1996 game Metal Slug. It was re-released in 1999 in a slightly modified/remixed form as Metal Slug X (メタルスラッグX). It has been ported to the Neo Geo CD, PlayStation, Virtual Console, iOS and Android, and to the Wii, PlayStation Portable and PlayStation 2 (as part of the Metal Slug Anthology). The game added several new features to the gameplay of the original Metal Slug, such as new weapons, vehicles and the ability to transform the character. It received generally positive reviews.

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