• Extract an ArkOS release zip into /roms/ports (the 'ports' folder inside your EASYROMS partition).
• DO NOT copy the autoexec.cfg file or any other cfg file from your install over.
• Copy the following files and folders from your RTCW "main" folder into your EASYROMS "ports/iortcw/main" folder:
  • sp_pak1.pk3
  • sp_pak2.pk3
  • sp_pak3.pk3
  • sp_pak4.pk3
  • pak0.pk3
  • scripts/
• If everything works, you should have an entry for Return to Castle Wolfenstein on your Ports menu.
• A correct installation should look something like this:

ark@rg351p:/roms/ports$ ls
 cannonball       cgenius                doom         easyrpg      opentyrian      quake        'Return to Castle Wolfenstein.sh'
 Cannonball.sh   'Commander Genius.sh'   doom2        EasyRPG.sh   OpenTyrian.sh   quake2       'Rick Dangerous.sh'
 cavestory        devilution            'Doom 2.sh'   ecwolf       pico-8         'Quake 2.sh'  'Wolfenstein 3D.sh'
'Cave Story.sh'   Devilutionx.sh         Doom.sh      iortcw       Pico-8.sh       Quake.sh      xrick
ark@rg351p:/roms/ports$ find iortcw
iortcw
iortcw/main
iortcw/main/scripts
iortcw/main/scripts/translation.cfg
iortcw/main/pak0.pk3
iortcw/main/sp_pak1.pk3
iortcw/main/sp_pak2.pk3
iortcw/main/sp_pak3.pk3
iortcw/main/sp_pak4.pk3
iortcw/main/sp_pak_ui.pk3
iortcw/main/sp_pak_settings.pk3
iortcw/main/cgame.sp.aarch64.so
iortcw/main/qagame.sp.aarch64.so
iortcw/main/ui.sp.aarch64.so
iortcw/COPYING.txt
iortcw/README.txt
iortcw/iowolfsp.aarch64

Troubleshooting:

• Problem: I can't control the game, but menus work fine!
• Solution: Delete the wolfconfig.cfg file in /home/ark/.wolf/main/.