Recalbox:
2021 Specifics and Troubleshooting:
Metal Slug 7 only uses the bottom screen for gameplay. The top screen displays a map or status. You have two options:
Before diving into the setup, it is important to understand the file requirements.
Unlike Metal Slug 1 through 6, which run on Neo Geo hardware, Metal Slug 7 requires a Nintendo DS emulator. You will not find a standard MAME "zip" file that works in the same way as the previous titles.
You need two specific files:
DS emulation requires BIOS files. Without them, Metal Slug 7 will black-screen or crash.