Yeah. I also use Bottles for GOG / itch games that don't have a native linux version. And I'm pretty happy with how it works. Things install smoothly and easily, and it has a very nice menu for the games I've installed. Here's what it looks like:

However, there have been some hiccups along the way that might have caused less patient people to give up. In particular, it took me awhile to work out that although I could tell bottle to launch a windows .exe from anywhere on my computer, it would only actually work properly if I first move the exe into the virtual drive - which deep inside a confusing directory structure. (The "troubleshooting" menu option goes directly into talking about this issue; but even finding that menu option isn't totally straight forward, especially if you're just launching the exe from a file browser or something.)

Anyway, the upshot is that I like bottles; because it is easy to use but also very transparent about how it works and what it is doing, which I like. But I wouldn't say it's the best option for everyone.

I run battle.net through Steam. Works just fine.

I also had no(*) trouble installing Battle.net in Heroic Launcher, FWIW. Steam probably shouldn't be much different.

(*) ok, well, not any more trouble than Battle.net usually is on Linux. The point is after prodding at it for awhile it eventually finished installing and updating and started up properly and has worked fine ever since.

Hell, I've got a game I legally purchased on CD back in the Win XP days I'd like to play, and the farthest I got is installed but fails to run.

In heroic, you can add the game and while adding it, click "run installer first" and then install the EXE and copy whatever cracks needed. I needed to do that with a few games that are literally not available anymore on stores.

Lutris had been so janky for me the past 10 years and many of the installer scripts literally don't install any dependencies anyways that I switched to heroic last year and I no longer have games that work completely fine and then next launch they don't work.

do steam games run on linux already or something?

Oversimplification coming, but...

Most (modern) games can actually just run on Linux already, because Linux is where the best cross platform developer tools are.

Today, if a developer wants to publish their game to Windows, Mac, Android, Playstation, Nintendo Switch and XBox - the odds are strong that the developer is actually (possibly unwittingly) writing a Linux native game and then using an engine to port the Linux version to the other platforms.

The reasons for this are complicated, but mainly boil down to Linux being the simplest target to reliably build developer tools for - because every part of Linux is open and public.

Like do you only have to do that for non steam games?

If a game is purchased through Steam, Steam launcher knows enough to choose the best available version of the game for the operating system - whether the best version is the Windows executable running under wine/proton, or a native Linux executable.

Some have native Linux versions, while the rest can be "translated" (not strictly emulation, but the concept is close enough) via Proton, a translation layer that Valve introduced with the Steam Deck, which is itself running (arch btw) Linux. I'm not sure what the split is in the catalog, but the steam deck verified list serves as an indication for Linux (for Arch, at least) compatibility in general.

This is true for both Steam and non-Steam games - the developer or publisher might offer a native Linux version, but packaging is always a mixed bag. This proton trick allows you to run the Windows version with the same compatibility it would have on the steam deck, no matter where it came from.