I forgot to mention, there are a few curators that I follow on Steam for co-op games:
- https://store.steampowered.com/curator/588052-Co-Optimus/
- https://store.steampowered.com/curator/7189360-Couch-Gaming-%2528Local-Multiplayer%2529/
- https://store.steampowered.com/curator/8485829-SvenEvils-Playground/
- https://store.steampowered.com/curator/34907518-Games-for-Lovers/
- https://store.steampowered.com/curator/34251578-4-Player-Co-op-Games/
- https://store.steampowered.com/curator/11707935-More-Than-4-Local-Multiplayer/
I just tested it and it works! I didn’t need to use the Compatibility page to force a proton version either, just typed that into the launch options. Thanks!