Metal Slug X (メタルスラッグ X, Metaru Suraggu Ekkusu) is a run and gun video game in the Metal Slug series. The game is available for the Neo-Geo console/arcade platform created by SNK. It was released in 1999 for the MVS arcade platform and is a remixed/upgraded/spin-off version of Metal Slug 2 that utilizes the game engine from Metal Slug 3. It is the pseudo-third title in the series. It was also ported to the Sony PlayStation. It was also released as part of the Metal Slug Anthology for the Wii, PlayStation 2 and PSP. It was available for download on the online Playstation network for the Playstation 3 and PSP on April 26, 2007.