dwproton, a fork of Proton from Dawn Winery, has been released as a standalone AppImage in version 11.0-13.

dwproton bundles the latest Wine and Proton Experimental patches to keep Windows games running on Linux, packaged here as a self-contained AppImage with no Steam required.

• Updated Proton, Wine and components to latest Proton Experimental (experimental-bleeding-edge-11.0-20260910)
• Imported all games patches that have now been upstreamed to Wine 11.18
• Imported new winewayland changes from latest Proton-EM
• Fixed Aniimo crashing in lobby menu, working on a better fix to send upstream
• Fixed Goddess of Victory: NIKKE ACE error after latest update (#55)
  • This should also apply to other games if/when they get similar updates

Source: GitHub