Some “exclusive” versions also require for the Atomiswave system:
A new mechanic allowed players to carry two power-up weapons simultaneously and switch between them. metal slug 6 mame 0139u1 rom exclusive
The "exclusive" version of associated with MAME 0.139u1 (often used with MAME4droid ) is frequently identified by the community as a bootleg or a non-authentic "mashup" rather than the original arcade version . The authentic Metal Slug 6 Unearthing the Ghost: The Quest for the Metal Slug 6 MAME 0
: The preferred way to run Atomiswave games today. Official Anthologies : Many players eventually opted for the Metal Slug Anthology metal slug 6 mame 0139u1 rom exclusive
