1999 · Shooter · Platform · Adventure · Arcade · Linux · Wii · PC (Microsoft Windows) · Mac · Android · iOS · Arcade · Neo Geo MVS · Neo Geo AES · Web browser
Metal Slug X is upgraded version of Metal Slug 2 (Metal Slug 2: Super Vehicle-001/I), which was released in March 1999 for the Neo Geo MVS. It fixed slowdown problems from the original game, and increased the difficulty. Metal Slug X also introduced some new elements to the game system.