Metal Slug X, also known as Metal Slug 3rd Mission or simply Metal Slug X, is a run-and-gun action game developed by SNK. Released in 1998, it is an updated version of Metal Slug 3, featuring new levels, enemies, and bosses. The game follows the adventures of Marc and Fio, two members of the elite military unit known as the "Metal Slug" team, as they battle against the evil forces of the Rebel Army.

It is important to note that was not released as a standalone disc in North America or Europe for the PS2. Instead, it was included in the Metal Slug Anthology (released in 2006/2007). In Japan, there were standalone releases (often under the title Metal Slug Super Vehicle-001 collection or similar bundles).

didn’t receive a standalone, native PlayStation 2 port in the way modern games do. Instead, it reached the PS2 through two primary methods: Metal Slug Anthology:

This is the most common way to access the game. The ISO typically includes Metal Slug 1, 2, X, 3, 4, 5, and 6. PS1 ISO Conversion: