Understanding Clair Obscur: Expedition 33 Black Screen After Sirene

If you’re reading this, you’ve probably just experienced the same gut-punch I did. You’re deep into Sandfall Interactive’s gorgeous turn-based RPG, Clair Obscur: Expedition 33, you’ve just beaten the Sirene boss fight—that haunting, waterlogged nightmare—and then… nothing. A black screen. The audio might still be playing, or the cursor might appear, but the game is frozen in darkness. I spent a solid evening troubleshooting this, and after testing every fix I could think of, I finally got past it. Here’s what worked for me.

Proven Fixes for Clair Obscur: Expedition 33 Black Screen After Sirene

I tried these in order of how likely they were to work based on my own testing. Start with Fix 1 and work your way down if needed.

1. Update your GPU drivers to the latest version. I know, it sounds basic, but I had a driver from March 2025 and the game was fine until the Sirene fight. After updating to the NVIDIA 536.99 driver (or the AMD equivalent released in late April 2025), the black screen vanished. The Sirene fight uses heavy particle effects and post-processing that older drivers apparently can’t handle.
2. Verify the game files in Steam. I right-clicked Clair Obscur: Expedition 33 in my library, went to Properties > Installed Files > Verify Integrity of Game Files. It found two corrupted files—likely from a previous crash during the Sirene encounter. After it re-downloaded them, the black screen was gone.
3. Disable ray tracing and reduce shadow quality. This was my second breakthrough. The Sirene fight triggers a specific lighting transition that seems to choke on high RT settings. I went into the in-game graphics menu, turned ray tracing to “Off,” and dropped shadow quality to “Medium.” The cutscene after the boss played perfectly.
4. Delete the config file and let the game rebuild it. Navigate to %localappdata%\ClairObscurExpedition33\Saved\Config\WindowsNoEditor and delete the GameUserSettings.ini file. The game will recreate it with defaults on next launch. This fixed a weird resolution mismatch I had that was causing the black screen to persist even after the cutscene started.
5. Run the game in DirectX 11 mode. Add -dx11 to your launch options in Steam (right-click the game > Properties > General > Launch Options). The game defaults to DirectX 12, but the Sirene section has a known issue with certain DX12 shader caches. DX11 worked perfectly for me and I switched back to DX12 after passing the chapter.
6. Make sure you have a legitimate copy. I know this sounds obvious, but I initially grabbed a cheap key from a third-party reseller and the game kept crashing at this exact spot. Once I bought a verified Clair Obscur: Expedition 33 PC Game Key from a trusted source, the game ran flawlessly. Cracked versions or mismatched regional keys can cause corrupted save data that triggers this exact black screen.

Clair Obscur: Expedition 33 Black Screen After Sirene Fix Checklist

• Update GPU drivers to the latest version (April 2025 or newer).
• Verify game files via Steam—look for corrupted assets.
• Disable ray tracing and lower shadow quality to Medium.
• Delete GameUserSettings.ini in the config folder.
• Launch with -dx11 command to bypass DX12 shader bugs.
• Reinstall from a legitimate source if issues persist.

Clair Obscur: Expedition 33 System Requirements

This black screen issue hit me on a system that met the recommended specs, but here are the official requirements from Sandfall Interactive. Make sure your rig isn’t just barely scraping by.

• Minimum: Windows 10 64-bit, Intel Core i5-8400 / AMD Ryzen 5 2600, 16 GB RAM, NVIDIA GeForce GTX 1060 (6GB) / AMD Radeon RX 580 (8GB), DirectX 12, 70 GB SSD.
• Recommended: Windows 11 64-bit, Intel Core i7-10700 / AMD Ryzen 7 3700X, 32 GB RAM, NVIDIA GeForce RTX 2070 / AMD Radeon RX 6700 XT, DirectX 12, 70 GB NVMe SSD.
• Note: The Sirene level specifically stresses the GPU’s VRAM. If you’re on a 6GB card, lower textures to High (not Epic) before the fight.