This is the most recommended way. You can run it as a standalone emulator or as a core within RetroArch. It handles Atomiswave and Dreamcast hardware effectively.
was released by SNK (and later SNK Playmore) in 2006 for the Atomiswave hardware. This game is still under copyright protection . Downloading ROMs for this game—unless you own the original arcade PCB or Atomiswave cartridge—is generally considered copyright infringement in most jurisdictions. metal slug 6 mame 0.139u1 rom
It strikes a balance between emulation accuracy and speed on non-PC hardware. Technical Setup and Emulation This is the most recommended way