Companies like Nintendo have a long history of aggressively pursuing legal action against ROM distribution websites, and the same protections apply to SNK's catalog. For Metal Slug 7 specifically, since an enhanced, modern version ( Metal Slug XX ) is actively being sold on multiple platforms, downloading a DS ROM of the original game is a particularly clear-cut case of copyright infringement. For collectors and enthusiasts, the only ethical and legal path is to purchase the game.
: These classic games were natively developed for the Neo Geo MVS (arcade) and AES (home console) systems. They ran on SNK's legendary 16-bit architecture, producing some of the finest 2D sprite work in gaming history. metal slug 7 neo geo rom