If you’ve just spent hours setting up EmuDeck on your Steam Deck, eagerly downloaded a Dreamcast ROM, and fired up Crazy Taxi or Sonic Adventure only to be greeted by a stark message demanding "BIOS," you aren't alone. This is arguably the most common stumbling block for new EmuDeck users.
EmuDeck is very particular about folder structures. You must place the BIOS files in one of the following locations depending on which emulator you are using: Primary Location (RetroArch/Flycast): Place both files in a subfolder named inside your main BIOS directory. Emulation/bios/dc/ Standalone Flycast Location: If using the standalone version, the path is more specific. Emulation/bios/flycast/bios/ Troubleshooting Steps dreamcast bios missing emudeck work