That was the goal of GOG Galaxy. It was just slow as molasses and had no Linux version.

Lutris can also do that but it hasn't been very reliable over the years and for some reason can't offer a combined library view.

https://lutris.net/ integrates Epic Games, Steam and GOG. And for those fine folks who have a Humble Bundle list of games, it also supports that and I think lists all Flatpak games as well. Butt however, ... its vibe coded nowadays. When I install it, then my PC has a problem with logging out. I have no idea why that is, but I tried this twice now (with weeks apart) and every time Lutris is installed, I can't logout correctly without using some terminal commandlines.

I’d love to be more independant from Steam. ... would be my solution if it integrated Steam in it.

I don't understand this. No shade towards you, I just don't get it. If you want be more independent from Steam, why are you requiring Steam to be integrated? What's the point? I really mean this question, so nothing toxic here in case it comes over like that. If you ever stop using Steam, then you can still install Heroic without using Steam.

Playnite was my all-in-one launcher on Windows, and last time I checked, Linux support was on their roadmap. Great piece of software, if only it was available for other systems.

(Don't bother trying to install the Windows version on Linux, btw. The installer doesn't work.)

See I always liked to play the where did I put that game in lutris. Where I would install the game, use the launch button during install and then 6 weeks later go to play again and it won't launch because I never mapped the gamestart.exe file, and for some odd reason many of them aren't in the install location.

I still don't know why it makes 2 folders, I looked it up awhile back and it said something like "because that's how it do" and I was like, k.

I stand corrected. Was that a recent addition? It's been a year since I used heroic and don't remember it being a thing