[2026-05-23] taiga sync: family/logs/vault-sync-2026-05-22.md wiki/SCHEMA.md wiki/concepts/vault-agent-integration.md wiki/htpc-bazzite-proton.md wiki/index.md

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---
-title: HTPC Bazzite — Proton Compatibility
-created: '2026-05-23'
-updated: '2026-05-23'
-type: tech
-namespace: personal
-tags: [htpc, infra, how-to, pitfalls]
-sources: [family/projects/htpc-windows-games-fix.md]
-confidence: medium
---
-
-# 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:
-1. Drop in Goldberg `steam_api64.dll`
-2. 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:
-1. `LANG=ru_RU.UTF-8 %command%` in Steam launch options
-2. `WINEDLLOVERRIDES="gdiplus=n,b"`
-3. 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
-
-## See Also
-
-[[personal-os-architecture]] [[obsidian-mcp-wrapper]]