Wuthering Waves, the anime-style action RPG by Kuro Games, has taken the gaming community by storm since its launch, but unfortunately, many players have encountered the dreaded 'Wuthering Waves fatal error line 677'. This error, often linked to Unreal Engine 4 (UE4), causes game crashes with a frustrating message: "The UE4-Client Game has crashed and will close. Fatal error." As of 2025, this issue remains one of the most discussed technical hiccups, especially for PC gamers eager to dive into WuWa’s stunning world.

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What Causes Fatal Error Line 677?

Fatal error line 677 in Wuthering Waves can be triggered by several factors:

  • Corrupted or missing game files

  • Outdated graphics drivers

  • Issues with Microsoft Visual C++ or DirectX components

  • Running the game from the Epic Games Launcher instead of the executable file

Many users on gaming forums and discussion boards have highlighted that this error often pops up after a recent game update or system changes. Fortunately, there are some proven solutions that can help you get back to playing without constant crashes.

6 Effective Fixes for Wuthering Waves Fatal Error Line 677

1. Relaunch Wuthering Waves from the EXE File

Instead of starting the game from the Epic Games Launcher, navigate to your Wuthering Waves install directory and run the launcher.exe or Client-Win64-Shipping.exe directly. This method bypasses any launcher-related issues and has helped numerous players resolve crashes instantly.

2. Verify Integrity of Game Files

Corrupted game files are a common culprit. To scan and repair these files:

  • Open Epic Games Launcher

  • Click the wrench/spanner icon near Wuthering Waves

  • Confirm the verification prompt

  • Alternatively, right-click the game in your Library, choose Manage, then click VERIFY Files

This process checks for missing or damaged files and replaces them as needed.

3. Update Graphics Card Drivers

Outdated graphics drivers are notorious for causing crashes in modern games. Visit the official AMD or NVIDIA websites to download the latest drivers for your GPU. Regular updates not only improve stability but may also boost overall performance and fix compatibility issues.

4. Install or Update Microsoft Visual C++ Redistributables

Wuthering Waves relies on the Microsoft Visual C++ runtime to operate correctly. Download and install the latest x86 and x64 redistributables from Microsoft’s official site. If problems persist, try installing older versions as some games require legacy support.

5. Update DirectX to the Latest Version

DirectX is critical for rendering graphics and handling game resources. An outdated DirectX can trigger UE4 fatal errors. Go to the official Microsoft page, download, and install the latest DirectX redistributable. This step is simple but can make a big difference.

6. Add Wuthering Waves to Steam and Force DirectX 11 Mode

Even though WuWa isn’t officially available on Steam, you can add it as a non-Steam game:

  1. Open Steam, click 'Add a Game' > 'Add a Non-Steam Game'

  2. Browse to the install location and select Client-Win64-Shipping.exe

  3. In Steam, right-click the game, open Properties, and under Launch Options, add '-dx11'

This forces the game to use DirectX 11, which has resolved crashes for many users.

Quick Reference Table

Fix Steps
Relaunch EXE Run directly from game folder
Verify Files Use Epic Launcher verification
Update GPU Download latest drivers
Visual C++ Install latest redistributables
DirectX Install latest version
Steam/DX11 Add to Steam, set '-dx11'

Community Experience and Final Thoughts

Players across Reddit, Steam discussions, and dedicated forums have reported positive results from these fixes. While some steps may seem technical, most users find them easy to follow with immediate improvements. Until Kuro Games releases an official patch, these methods remain the best workaround for 'Wuthering Waves wuthering waves fatal error line 677'.

If you’re facing persistent crashes, don’t hesitate to try these steps. Sometimes, all it takes is a quick driver update or file verification to restore a smooth gaming experience. Remember to keep your system and game software up to date—Wuthering Waves is worth the effort!