It would be honestly awesome if Flatpaks or something like this would, one day, add what it's needed to play games with Nvidia cards without actually using the video driver in the whole system, especially for hybrid hardware users like me for my laptop. Nouveau works just better, but hasn't the performance. If someone will be able to "containerize"(???) the Nvidia proprietary drivers under one app specifically, it'd be great. Years later, Nvidia still struggles to provide with the perfect driver.

@BlackPraedicator assuming the trainer *does* work on Linux, then what you want is to run it with Protonfix > choose the Proton Prefix for your game > "Use default Wine Prefix" > Install/Uninstall Game > use the Install button there.

Why so complicated? Because trainers need access to the game process, and the game process is isolated per Proton prefix. This is the way that I know in order to run processes in the same Proton prefix. Otherwise? You're better off using Game Conqueror.

Can you add how to use trainer on flatpak?

Great guide.

Adding another comment: if you're using Flatpak Lutris, you'll need to do `ln -s ~/.var/app/com.valvesoftware.Steam/.steam ~/.steam` so that it can detect installed games on Steam Flatpak.

This should be the only thing you need to do, however, as Lutris now uses xdg-open to run Steam (tho that can be a hassle if you've changed Steam's .desktop app name or have multiple Steam installed - as it detects by name).

Btw, for generating a mangohud conf quickly, I'd recommend something like this: `mkdir -p ~/.var/app/com.valvesoftware.Steam/.config/MangoHud/ && echo -e "horizontal\nlegacy_layout=0\nhud_no_margin\nfont_size=25\ntable_columns=28\nbackground_alpha=0.5\ntime=1\ntime_format=%I:%M %p\ngpu_stats\ngpu_temp\ncpu_stats\ncpu_temp\nram\nvram\nfps\nframe_timing\nframetime\ntoggle_hud=F8\nresolution\nwine\nvulkan_driver\n" | tee ~/.var/app/com.valvesoftware.Steam/.config/MangoHud/MangoHud.conf`

Config I base on Gaming-On-Linux [www.gamingonlinux.com] preset which is based on Steam Deck's Horizontal preset (which is incorporated as an official preset on MangoHud upstream now but I don't think they show the Wine version in that preset).

As a note, I think for gamescope it'll eventually move to `org.freedesktop.platform.vulkanlayer.gamescope`, though looking at my flatpak warnings, Steam, Heroic, and Bottles still use `com.valvesoftware.Steam.Utility.gamescope`. I personally just install both, not gonna lie.

Also, would recommend adding a section on non-Steam games as well. People can now just Lutris, Heroic, and Bottles on Flatpak and have it add the library there to Steam as well (though they may need permission to flatpak Steam's `~/.var/app` directory. Especially useful since Lutris can now interface with Flatpak emulators as well. Also, would recommend using SGDBoop (it's on flathub, AUR, Nix, and otherwise easy to install) after that to edit the added games' arts on Steam.

For Proton-GE, I'd recommend most people to just use ProtonUp-Qt (or protonup-ng if they prefer CLI). Speaking of, AdwSteamGtk is really nice for getting Steam to look nicer on Linux, and it's on Flathub as well.

Agreed. It should be standard across the board, with the user having the ability to override it.

To elaborate further, there's a standard called the XDG Base Directory specification and by default flatpak's environment sets XDG_DATA_HOME=~/.var/app/com.valvesoftware.Steam/data instead of ~/.var/app/com.valvesoftware.Steam/.local/share but not all applications respect XDG and can just place their files wherever they like.

I don't know the reasoning behind why Flatpak does this, in my opinion it just causes confusion.

Awesome! Thanks for your quick response. ^_^