: If you are on macOS Big Sur or later, you may need to manually safelist the MAME core in your System Settings.
The Metal Slug series remains the gold standard for run-and-gun arcade action. With its hyper-detailed, hand-drawn sprite animations, explosive gameplay, and unforgiving difficulty, it is a franchise that demands pixel-perfect emulation. For macOS users, OpenEmu is the premier solution to experience these classics. openemu metal slug verified