Retroarch Bios Pack May 2026

Introduction

Never run an executable file claiming to be a BIOS pack. BIOS files are .bin, .rom, or .zip—never .exe.
Scan before extracting. Use VirusTotal or Windows Defender.
Trusted sources (based on community reputation) generally include "Internet Archive" (non-commercial) and Reddit megathreads (r/Roms).
Avoid "BIOS pack generators." These are almost always keyloggers.

BIOS files are copyrighted code. Sony owns the code inside the PlayStation BIOS. Nintendo owns the code inside the GameBoy Advance BIOS. retroarch bios pack

Depending on what you want to play, these are the most common files found in a standard RetroArch BIOS pack: Retro Game BIOS Files - What are they? Where? Which ones? Introduction

dc_boot.bin and dc_flash.bin should be in the root of the system folder, but sometimes Flycast expects them in system/dc/.
neogeo.zip must stay as a ZIP file in the root of system for FinalBurn Neo to find it.

| Core Name | System | Required BIOS File(s) | Typical MD5 Checksum | |-----------|--------|----------------------|----------------------| | Beetle PSX | PlayStation | scph5500.bin, scph5501.bin, scph5502.bin | 8dd7... (varies) | | Genesis Plus GX | Sega CD | bios_CD_U.bin, bios_CD_E.bin, bios_CD_J.bin | e66fa... | | PCE Fast | PC Engine CD | syscard3.pce | 381f... | | NeoCD | Neo Geo CD | neocd.bin, neocd_f.bin, neocd_z.bin | df66... | Never run an executable file claiming to be a BIOS pack

The "System" Mix-up: Beginners often accidentally put BIOS files in the roms folder, where RetroArch cannot see them. If you're setting this up right now, tell me: What platform are you on (PC, Steam Deck, Android, etc.)? Which console are you trying to play (PS1, Saturn, etc.)? Are you getting a specific error message?

A RetroArch BIOS pack is a collection of these essential system files, bundled together to ensure all your cores function with maximum accuracy and compatibility. This guide explains what these files are, why you need them, and how to set them up correctly. What is a RetroArch BIOS?