ProtonUp-Qt VS HeroicBashLauncher

Lutris is a launcher for applications that run on Linux, that's the most comprehensive answer. It is highly configurable and supports scripting. Probably the most common use is launching non-steam Windows games with Wine and DXVK/VKD3D (I recommend a tool called ProtonUp-Qt for managing versions of this software). However, it can be configured to launch just about anything, including native Linux executables etc. Many popular titles will have scripts that automate the installation and setup, making them plug and play (if the script is good, that is). But everything the script does can be done manually too.

Try Installing proton up qt (haven’t tried it yet, I have the same issues as you). You can find it here (use dxvk): https://davidotek.github.io/protonup-qt/

Easiest way is to ise ProtonUp-Qt: https://github.com/DavidoTek/ProtonUp-Qt

Install ProtonUp-Qt from the Discover store and open it

/// protonGE downloader ensures you have the latest version

In the discover store you can find https://davidotek.github.io/protonup-qt/ that will download the latest.

Try installing it through Steam instead of using Wine directly. Mine is currently set to "Force the use of a specific Steam Play compatibility tool" and GE-Proton7-41, so try installing that one if none of the Proton versions that come with the Steam client works. Installing a custom version of Proton is fairly simple if you know the command line, basically just unpack it into the right folder. But if you prefer graphical tools you can use ProtonUp-Qt instead.

I'd try that since it's something you haven't tried at least. Check the first comment - all you have to do is install protonUp-Qt and then launch it. Use protonup to install Proton GE 7-55. Then, when you go to steam (might require a restart, don't remember) in the compatibility settings for the game you can set it to the Proton GE version.

Bit late but luxtorpeda has gzdoom as an option along with qzdl for launching with mods. You just gotta install protonup-qt from the discover store in desktop mode. A quick YouTube/Google search can show you how but that's the rough gist of it.

Can you utilize addtosteam.sh with this similar to how heroic did?

I've previously used Heroic Bash Launcher for that. It generates a script that opens the game in exactly the same way Heroic does, and you can then add the script as a non steam game.

The EUREKA moment came from a thread for CIV IV on a random Heroic Launcher Github thread. https://github.com/redromnon/HeroicBashLauncher/issues/38

Works for me with Lutris shortcuts and some native Linux games I have installed. Herioc shortcuts needs an extra step using Heroic Bash Launcher

You're probably better launching through heroic and not directly using proton. This project looks like it might add all your heroic games to steam automatically: https://github.com/redromnon/HeroicBashLauncher

Heroic Bash Launcher

Use Heroic Launcher (find in desktop mode via discover (flatpack)). Install Windows versions to take advantage of Steam/Proton. Sync saves using Heroic Launcher too (be careful the feature is currently in Beta, but working fine for me in D:OS). Install the shortcut in your steam library using Heroic Bash Launcher, job done.

For heroic installed games, i used https://github.com/redromnon/HeroicBashLauncher to add steam shortcuts for individual games.

But for Heroic, afaik you need this, though I am still working on the guide and can't 100% confirm.