These are "lite" sets popular for lower-powered hardware like the Raspberry Pi or older mobile devices. They focus on compatibility with specific RetroArch cores. FBNeo (FinalBurn Neo) Sets:

❌ Pop-up-ridden “ROM sites” from 2003 ❌ Any .exe file claiming to be “ROM installer” ❌ Packs without a .dat file for verification

: The original or most complete version of a game is the "Parent." Variations like different regional releases or bug fixes are "Clones". BIOS and Device ROMs

If you are running the newest version of MAME on a powerful modern PC, you want the most recent "Reference Set" to ensure compatibility with updated emulation cores. Where to Find Reliable Downloads?