So aside from Heroic and other NS launcher, at this point i already have installed the app of Epic, GoG and Ubisot correctly. I've also added some artwork with a Decky plugin. After that i've made some folder in my sd named [ launcher game sd] and both with EG and GoG i can find those folders in E:/ and install the game on the sd.
So far so good.
Now, if i try to add the file.exe of a game installed from Epic launcher to my steam library i can actually run the file as a NS game ( Cat quest - proton experimental) but the game don't have any savings. My question is, do I have to run the game from their Epic launcher or there's a way to have my NS games diectly in my library ??
The problem is that when you add the exe to Steam and run it Proton will create a new fake C-drive for that exe. All your saves are in the fake C-drive for the launcher.
To solve this you can either copy or link the saves to the correct C-drive (it's usually called a Wine or Proton prefix or STEAM_COMPAT_DATA_PATH). Google should tell you how to find the correct folder.
Or you can tell Proton in the Steam-entry to use the prefix of the launcher. You'll have to set STEAM_COMPAT_DATA_PATH to the correct folder. The upside with this approach is that your drive won't be cluttered with useless prefixes for every game.
A third way to handle it is to install games with a helper like Heroic or Lutris, that makes it easier to keep track of the prefixes. They usually have a way to add a game to Steam.
Ty i'll eventually try Heroic then. ๐๐ซ
This is the easiest way. After installing the game, Heroic even has a command that will add it to Steam (with artwork IIRC).