Inside the exact same folder where your Neo Geo game ROMs are stored.

: Set your aspect ratio to 4:3 for the original intended look, or use "Core Provided".

: RetroArch cores read arcade games directly from their .zip or .7z archives. Unzipping the files will break the file structure and cause the game to fail.

You cannot run Neo Geo games without the official system BIOS. The BIOS file must be named exactly neogeo.zip . Do not unzip this file.

The Universe BIOS is a hacked replacement BIOS that allows you to cheat, change region settings instantly, switch between AES (home console) and MVS (arcade) mode, and even fix blood colors (turning green blood back to red).

So, why are Neo Geo ROMs for RetroArch so popular? Here are a few benefits:

We must address the elephant in the room: Are Neo Geo ROMs legal?

Now, insert coin. Choose your fighter. And prepare for an instant replay of the 1990s arcade glory days.

: A stable alternative that runs well on lower-end devices and uses a "frozen" ROMset that does not require frequent updates.

While the name suggests "Home Brew," is currently the most reliable core for Neo Geo titles within RetroArch. It is a fork of MAME (Multiple Arcade Machine Emulator) with excellent ROM handling and save state stability.

If your hardware struggles to maintain full speed, open the RetroArch Quick Menu while the game is running, go to , and look for Latency or video optimization settings. Alternatively, switch from a demanding MAME core to the more lightweight FinalBurn Neo core.

: Neo Geo games require the system architecture file, named neogeo.zip , to boot. Where to Place the BIOS ( neogeo.zip )

Unlike standard console cartridges, Neo Geo games were built on arcade hardware. This means the ROM files require specific management types to load correctly in RetroArch.

MAME (Current) or FB Alpha 2012 Neo Geo (for low-powered devices). The Essential BIOS: neogeo.zip