For the best compatibility and performance on most modern devices, use FinalBurn Neo (FBNeo) Arcade Games (MVS/AES): Arcade (FinalBurn Neo) is the gold standard for Neo Geo emulation in RetroArch. SNK - Neo Geo CD (NeoCD) core if you are specifically playing CD-based titles. How to get them: Online Updater Core Downloader and select the cores mentioned above. 2. The Critical BIOS File Neo Geo games will not run without a BIOS file named neogeo.zip