Vulkan validation layers is a separate package that you need to install. On Steam Desk it certainly isn't included, and on typical arch gaming machine it just wastes SSD space. So that special dolphin option probably needs to be off unless you are a developer, on a developer machine.

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The game is fully playable on Linux from start to finish with 0 crashes.
However depending on gpu settings the game might slow down during some cutscenes and the video desyncs from the audio when that happens (this is mainly at the begining and ending parts of the game).
Also videos don't work. Some of the devs claim they got partial video playback working but that the game still crashes during playback of one of the videos. I was unable to get the video playback to work so far using the system gstreamer libraries.

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Quoting: Buhe226.4 was a major improvement to what I could now run, like Ren'ply, RPGM and Unity with no problem, but now, after 6.5, I can get nothing running. The stable version still runs 'some' of my windows stuff. Is anyone else having this problem with other windows stuff?

There were some regressions such as this one recently that were fixed.
https://bugs.winehq.org/show_bug.cgi?id=50858 [External Link]
So if you retry on 6.6 hopefully those programs are working again. If not you should file a bug report.

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I think the VFIO should be a separate option. Then for options:
No
Yes, Single GPU passthrough
Yes, GPU passthrough with AMD host
Yes, GPU passthrough with Nvidia host
Yes, GPU passthrough with Intel host
Yes, Some other setup

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The author of this article really didn't do their research. The game runs fine without needing a patched mesa.
You just need to install some extra audio packages and launch the game using a special command for the audio.
The game's old renderer is also still usable so you don't even have to mod the game to play, but it won't support super high res. (2560x1080 works, 2560x1440 didn't for me)
See here for my WIP updated package build for arch. (based on the GOG AUR package)
https://drive.google.com/open?id=18Z2WnMgNdAsHG_N61ltFoRvEnLL2XCx2 [External Link]

Basically you install the following: lib32-sdl lib32-libgl ossp innoextract lgogdownloader
Using gog downloader you can download the game from gog from the command line straight into the folder where the package build is.
lgogdownloader gogdownloader://unreal_tournament_goty/en1installer0
Then then just run makepkg and install.
makepkg
sudo pacman -U gog-unreal-tournament-goty-2.0.0.5-3-x86_64.pkg.tar

This package build will install the game to /opt (with more permissions so that game saves actually work, and you can add more mods/files to the game), and create a desktop file that points to launcher.sh and the game's icon.
The launch.sh command is the following:
cd "/opt/gog/gog-unreal-tournament-goty/System" && padsp ./ut-bin

From there the game is fully playable already on an AMD arch system. (even with 16 core cpu)
Then from there you can install the updated OGL renderer and some enhanced textures.
Note that the upcoming patch will include the updated renderers built-in. So once we get that you won't need to manually install it anymore. They are already whitelisting the renderers for server side.

Note also that the game is perfectly playable using VIRGL with QEMU. So you can run the game in an ARCH VM without needing to pass through a GPU. So the challenge is how many players can you cram onto a single PC? (each with their own 1080p monitor running the game at 100fps)

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