FBNeo expects specific filenames and internal CRC (checksum) values. Don't Rename Files: Never rename the files. The emulator looks for Metal Slug.zip Non-Merged vs. Split: Non-Merged (Recommended):
To fix an "Unknown" ROMset, you need the DAT file. fbneo romset unknown
for Street Fighter III). If you renamed your ROM to something more "readable," the emulator will no longer recognize it. Version Mismatch FBNeo expects specific filenames and internal CRC (checksum)