RetroPie

RetroPie is an installer for EmulationStation & RetroArch on single-board computers (SBCs) such as the Raspberry Pi.

BIOS

Because RetroPie uses RetroArch under the hood, the instructions are generally the same as RetroArch. By default, the RetroPie BIOS directory is /home/pi/RetroPie/BIOS/:

RetroPie (Linux)

igir copy extract test clean \
  --dat "https://raw.githubusercontent.com/libretro/libretro-database/master/dat/System.dat" \
  --input BIOS/ \
  --output /home/pi/RetroPie/BIOS

ROMs

The RetroPie docs recommend creating a retropie/roms directory at the root of a USB drive. You can then load up this USB drive with your ROMs from a different computer:

Windows macOS Linux

Replace the E:\ drive letter with wherever your SD card is:

igir copy zip test clean ^
  --dat "No-Intro*.zip" ^
  --input "ROMs" ^
  --output "E:\retropie\roms" ^
  --dir-dat-name ^
  --dir-letter ^
  --no-bios

Replace the /Volumes/RETROPIE drive name with whatever your SD card is named:

igir copy zip test clean \
  --dat "No-Intro*.zip" \
  --input "ROMs/" \
  --output "/Volumes/RETROPIE/retropie/roms/" \
  --dir-dat-name \
  --dir-letter \
  --no-bios

Replace the /media/RETROPIE path with wherever your SD card is mounted:

igir copy zip test clean \
  --dat "No-Intro*.zip" \
  --input "ROMs/" \
  --output "/media/RETROPIE/retropie/roms/" \
  --dir-dat-name \
  --dir-letter \
  --no-bios