Given the difficulties with MAME 0.139u1, enthusiasts typically look toward alternative platforms to experience the game:
Running Metal Slug 6 on MAME 0.139u1 is a nostalgia trip to the twilight of the arcade era. It represents the franchise stepping into slightly more modern hardware while retaining the hand-drawn soul that fans love. By ensuring your ROM set matches the 0.139u1 build and your BIOS is in place, you can experience one of the hardest and most rewarding entries in the SNK canon. metal slug 6 mame 0139u1
"mslug6 NOT FOUND" or "romset is incorrect" Given the difficulties with MAME 0
: The game is widely available through the Metal Slug Anthology on PlayStation 2, PSP, and Wii. "mslug6 NOT FOUND" or "romset is incorrect" :
: The authentic arcade version of Metal Slug 6 is generally not playable in MAME 0.139u1. Most sources indicate that for the Atomiswave version, you must use more modern emulators like Flycast or FBNeo within RetroArch.
Are you trying to get this running on a or an older PC ?