HTPC Bazzite — Windows Game Proton Compatibility

Bazzite HTPC at bazzite@192.168.1.86. 39 non-Steam Windows games added as Steam shortcuts (2026-05-22). Default tool: Proton Experimental; older titles on Proton 8.0.

Working Games

Fallout 4, Vladik Brutal, Red Alert 3, GTA V, Cuphead. Samurai Gunn works but gamepad is not detected.

Common Fix Recipes

"Doesn't start" → try vcrun2019

For UE3/UE4 and modern Windows titles missing Visual C++ runtime:

protontricks <AppID> vcrun2019 d3dcompiler_47

XNA 4.0 games (Duck Game, etc.)

protontricks <AppID> xna40

DOS-era games (e.g. Atomic Bomberman)

Proton won't work. Use Steam Tinker Launch → wrap with DOSBox (dosbox-staging).

Non-Steam copy of a Steam game (e.g. Metro Exodus)

Game needs steam_api64.dll emulator:

Drop in Goldberg steam_api64.dll
Add steam_appid.txt with the real App ID (e.g. 412020 for Metro Exodus Enhanced)

Cyrillic encoding issues (e.g. Discworld Noir)

Try in order:

LANG=ru_RU.UTF-8 %command% in Steam launch options
WINEDLLOVERRIDES="gdiplus=n,b"
Install ttf-mscorefonts manually + set Cyrillic codepage in Wine registry

White screen / broken D3D9 (Doom 3 BFG, Rayman Origins, Split Second)

PROTON_USE_WINED3D=1 %command%

Or try WINEDLLOVERRIDES="d3d9=b" or an older Proton version.

Key Infra Notes

shortcuts.vdf: binary VDF at ~/.steam/steam/userdata/147839491/config/shortcuts.vdf Edit with Steam closed: systemctl --user stop gamescope-session-plus@steam.service
CompatToolMapping: ~/.steam/steam/config/config.vdf — per-AppID Proton override
Wine prefix: ~/.local/share/Steam/steamapps/compatdata/<AppID>/pfx/
protontricks: Flatpak, needs xvfb + flatpak filesystem permission to ~/.local/share/Steam
Background protontricks (survives SSH disconnect): systemd-run --user --unit=<name> flatpak run ...

Broken Status (2026-05-22)

Game	AppID	Issue	Next
Atomic Bomberman	2875360586	DOS-era; 0x0 memory read	DOSBox wrapper
Brawlhalla	2410005953	Won't start	Try `Brawlhalla.exe` entry-point
Duck Game	2926094216	XNA 4.0 missing	Wait for `xna40` install
Worms W.M.D	3846411911	UE3 + anti-tamper	`vcrun2019 + d3dcompiler_47`
Metro Exodus	3594910936	steam_api64.dll	Goldberg + appid.txt
Castle Crashers	3048471472	Mini-dump crash	`vcrun2019 dotnet48`

Gamepad Issues

Samurai Gunn, Super Bomberman R2: not detected → try Steam Input "Force Off" → "Use Default" cycle → or SDL_GAMECONTROLLER_ALLOW_STEAM_VIRTUAL_GAMEPAD=1
Metal Slug X: wrong speed in Neo-Geo wrapper → check emulator settings

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