What is it with bad guys and world domination? Morden's Army is at it again, and only the Metal Slug team can stand in its way. But taking down Morden and his troops won't be easy. Fortunately what the team lacks in wits, it makes up for with ordnance: they've got about ten zillion bullets and grenades, plus the ultra-advanced (and stylish) Metal Slug supervehicles. Gentlemen, start your war.

Metal Slug X is the best of the already awesome Metal Slug series of run and gun action-adventure games for the Neo-Geo home and arcade units. Released in 1999, it is something of a remixed, upgraded, "director's cut" version of Metal Slug 2.