Here is the definitive troubleshooting hierarchy to get your games running.

: Ensure it is a .zip or .7z file and not unzipped into a folder.

Your ROM is outdated, mismatched, or renamed compared to what this specific FBNeo build expects.

The ability of FBNeo to fix unknown ROMsets has several benefits for retro gaming enthusiasts:

The "" error in FinalBurn Neo (FBNeo) usually means the emulator cannot find a matching entry for your file in its internal database. This often happens because the file has been renamed, is from an incompatible MAME version, or is in the wrong format. Common Fixes for "Romset is Unknown"