From Mr. Michael Larabel at Phoronix:
Lutris 0.5.13 has been working on Proton support, drag-and-drop support for the main window, Itch.io integration, Battle.net integration, improved DOSBox game detection with GOG, and other enhancements.
I am a big fan of Lutris and have previously written about using it to run visual novels that require a Japanese language environment. One feature it was missing for me was Itch.io integration. I bought one of those huge Itch bundles and I am not familiar with all of the games in it. Being able to manage the library through Itch will be clutch. However, I will wait for the functionality to make it into the main release (I run the Lutris build from the regular Arch Linux repositories).