steamsync VS steamgriddb-manager

I've used steamsync on Windows to auto add all my Epic (and itch and Gamepass) games to Steam, but it was an extra step after installing. Since these Legendary GUIs are already doing some custom work, I'd expect they could do that extra hookup for me. Looks like BoilR could also handle it if steamsync doesn't work in Linux. I'm not sure if I'm missing something or if no one has connected these things together to make the process seamless yet.

You can launch Epic games through steam (steamsync automates adding them) and usually Steam's extra gamepad support applies (unless it requires Epic online services). I haven't tried the PS5 gamepad with other stores yet.

I managed to find this github project for adding Epic Games Store games as non-Steam games automagically: https://github.com/jaydenmilne/steamsync

For me, the best tool out there is this: https://github.com/jaydenmilne/steamsync

Steamsync

If you add non-Steam Epic games straight, controllers will act like keyboard and mouse. Many people using OSOL to add Epic games to Steam, but it never works for me. But I found a tool that working great lately, called Steamsync, this should fix your problem, more people should know about this tool. Here is the link: https://github.com/jaydenmilne/steamsync

SteamGridDbManager

Sure you can do that on Steam either as adding any game as non-Steam game from menu or use tools like this to do that.

You should really use steamgriddb manager to set consistent images that's what ROMs ce done and it looks great https://www.steamgriddb.com/manager

Steam already has that feature way way before even others were a thing back then. It's https://help.steampowered.com/en/faqs/view/4B8B-9697-2338-40EC and to do this in a shortcut, you can use https://www.steamgriddb.com/manager to import your "installed" games from other launchers.

The tool https://github.com/SteamGridDB/steamgriddb-manager

Steamgriddb manager? just googled it, https://www.steamgriddb.com/manager found that it is not under development? I didn't plan to replace it, but I can imagine that there is probably some overlap.

Have you tried SteamGrid DB Manager ? It has worked to import games for Epic and other launchers before. I have Battlefront II from Epic sure also and i think I used that to import it.

steam grid db manager

for Epic and the rest: I would use https://www.steamgriddb.com/manager (or https://github.com/WombatFromHell/OriginSteamOverlayLauncher) for this sort of stuff...but it may be reliable for certain games (aka Call of Duty Warzone).

There is also this manager which is made for many launchers to be easy to import into steam. I've never used it personally and don't know if it's made for steam input in mind.