UltraWidePatches/games/Expedition33

Clair Obscur: Expedition 33 — UltraWide

⚠️ Partial support — reduced feature profile. ClairObscurFix v0.0.10 is archived and predates the current game build; running it with upstream defaults crashed on save load. This repo ships a reduced profile with only the 32:9 HUD centering enabled.

• Engine: Unreal Engine 5 — no DRM (no SteamStub; .text entropy 6.74)
• Steam AppID: 1903340
• Executable: SandFall-Win64-Shipping.exe
• Method: external — vendored third-party fix + our 32:9 config

We did not write this fix

The ultrawide work here is ClairObscurFix by Lyall (MIT), vendored unmodified. It is mature and already handles the hard parts; reimplementing it would be duplicated effort for no benefit. All credit for the fix itself goes to Lyall.

What this repo adds is the 32:9 configuration verified on a Samsung 49" G93SC, packaging, and a one-command installer consistent with the other games here.

The upstream repo is archived, so it will not receive further updates. Vendoring it here means the version you need stays available.

Install (Linux / Proton)

./install.sh Expedition33

Then required — Steam → Properties → Launch Options:

WINEDLLOVERRIDES="dsound=n,b" %command%

Set 5120×1440 fullscreen in-game.

Install (Windows)

Extract the release zip into …\Expedition 33\Sandfall\Binaries\Win64\.

Our 32:9 config

ClairObscurFix.ini ships with upstream defaults except:

Option	Upstream	Ours	Why
[Center HUD] Enabled	false	true	At 5120px wide, HUD elements anchored to screen edges end up absurdly far apart

Everything else is left at upstream defaults, which are already ultrawide-friendly:

Option	Default	Effect
Cutscene Letterboxing	false	No bars in cutscenes
Fix Movies	true	Crops letterboxing from pre-rendered video
Adjust Resolution Checks	true	Uses the monitor's max resolution rather than "native"
Uncap Cutscene FPS	true	Removes the 30fps cutscene cap

Tuning

Edit …/Sandfall/Binaries/Win64/ClairObscurFix.ini (requires a restart — this fix has no live reload):

• HUD too cramped? Raise [Center HUD] AspectRatio from 1.77778 (16:9) to 2.33333 (21:9) — usually the sweet spot at 32:9.
• Prefer the HUD spanning the full width? Set [Center HUD] Enabled = false.
• Want cinematic bars back? [Cutscene Letterboxing] Enabled = true.

Uninstall

./install.sh Expedition33 uninstall

Known issue: version drift

ClairObscurFix v0.0.10 (May 2025) is archived and no longer tracks the game.

Observed on a current build (2026-07-21), with upstream defaults:

[error] Resolution Checks: Pattern scan failed.
[error] Resolution Scale Bug: Pattern scan failed.

…followed by a crash when loading a save. Removing the fix entirely made the game load normally, isolating the fix as the cause. The crash coincides with the fix's Level Load hook, which is consistent with a hook attaching to shifted code in a newer binary.

Mitigation: ship a reduced profile — everything disabled except Center HUD, the only option genuinely needed at 32:9. The failing scans are disabled outright since they were already inert.

Maintenance / revalidation

Because upstream is archived, this entry decays as the game patches. Re-check after any significant game update:

1. Launch and load a save. If it crashes, remove the fix (./install.sh Expedition33 uninstall) and retry to confirm the fix is the cause rather than the game or Proton.
2. Read Sandfall/Binaries/Win64/ClairObscurFix.log — Pattern scan failed lines mark hooks that no longer match the binary.
3. Disable any newly-failing feature in ClairObscurFix.ini; a failed scan is inert, but a wrongly-attached hook is what crashes.
4. If Center HUD itself stops working, this entry should be marked unsupported. The game has no DRM, so writing a small dedicated HUD-centering patch is a viable replacement.

Still unverified at 32:9

• Is Center HUD at 16:9 right, or is 21:9 (2.33333) better?
• Camera FOV — Hor+ (see more) or Vert- (zoomed)?
• Pillarboxing in cutscenes / pre-rendered movies (Fix Movies currently off)