https://github.com/GloriousEggroll/ULWGL

From the github:

WHAT DOES THIS MEAN FOR OTHER LAUNCHERS (lutris/bottles/heroic/legendary,etc):

• everyone can use + contribute to the same protonfixes, no more managing individual install scripts per launcher
• everyone can run their games through proton just like a native steam game
• no steam or steam binaries required
• a unified online database of game fixes (protonfixes)