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.

Sinopse em inglês, como veio da fonte.

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.

Sinopse em inglês, como veio da fonte.