steamsync VS SteamControllerSinger

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

A few weeks ago, I made a now-merged PR to the existing SteamControllerSinger to add Deck support. It appears to work with the Steam Deck out of the box with just a simple modification to detect the Deck's controller's VID. There's an issue on that repo, though, that I haven't had the chance to look into yet. Valve has allowed the thread for that program to stay in the official Steam discussion boards for years, if it makes you feel any better.

All we can do in the meantime is play midi files with its haptic feedback