This page includes some specific guidance for how to use rmodman with Steam when Steam is installed as a FlatPak. It is similar to installing rmodman on Steam Deck, but requires some additional steps for how the appimage is launched.

Installation Instructions

1. Download the AppImage from the releases page.
2. In Steam library: Add a Game -> Add a Non-Steam Game -> the r2modman AppImage file
3. Adjust launch settings for the game to add these launch options: --appimage-extract-and-run --no-sandbox
   • The no-sandbox is necessary due to current issues with AppArmor on all Electron apps.
4. Add to the game's data folder the blank .forceproton
   • (Your game's path is likely something like /home/steam/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/ATLYSS)
5. rmodman should now be launchable via Steam. In rmodman, set:
   • Your game's path (see above)
   • Steam path, which is likely something like /home/steam/.local/share/Steam