A genuine Metal Slug 6 Atomiswave ROM is approximately compressed (ZIP format). If you see a file listed as 5MB or 500MB, it is either a fake, a hack, or a different region version with padding.
: The game was officially ported to the PlayStation 2 (initially Japan-only) and is included in the Metal Slug Anthology for the Wii, PSP, and PS2 . new download neo geo roms metal slug 6 rom high quality
Not all ROMs are created equal. Searching for “new download” implies you want the latest, most accurate dump. Here is what distinguishes a high-quality ROM from a broken one: A genuine Metal Slug 6 Atomiswave ROM is