Fallout New Vegas
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Wrye Bash Team

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About this mod

Wrye Bash is a multipurpose mod management and mod installation utility.

Permissions and credits
We only support Fallout: New Vegas version and
Wrye Bash 310 or higher.

We can not help with NMM / MO / MO2 related problems

Important: Wrye Bash needs developers
If you are familiar with the Python programming language, please consider helping with development. We ported our repository to git at github to make contributing super easy. If you are interested, you can find more information in our Contributing.md.


Since 308, Wrye Bash no longer supports 32-bit systems.
Since 310, Wrye Bash no longer supports Windows 7 (or older).
If you need a version that works on such systems, please see our GitHub releases.

Purpose of FO3/FNV versions compared to Valda's versions.

Since 309, Wrye Bash supports every single patcher that valda's versions support. It is therefore highly recommended you use our version, since it is much more up-to-date and also features other patchers not available in Valda's version. What we are hoping for is continued feedback on current functionality with FO3 and FNV to ensure it is as stable as possible. Please share your feedback on the Wrye Bash Discord or in the Wrye Bash AFK Mods thread.

Migration Information and Links to Valda's Wrye Flash.

Wrye Flash for Fallout NV by Valda
Wrye Flash to Bash Migration Guide by Dubious

What does Wrye Bash do?

Wrye Bash is a powerful mod management utility for games based on Bethesda's Creation Engine. A few of its countless features are:

  • Mod installation and file conflict management
  • Plugin load order management
  • Screenshot management
  • .ini tweak management
  • Clean uninstallation of mods, even conflicting ones
  • The "Bashed Patch", which allows you to increase the compatibility of mods, configure the game to your liking via tweaks and to surpass the 255 plugins limit by merging patches into it

Windows Store Support

Wrye Bash supports the Windows Store version of Fallout: New Vegas. You will have to use the standalone download, since the installer does not and cannot support this version of the game.

Feedback? Comments? Questions?

Please give feedback and feel free to join the discussion at the current official thread: Wrye Bash - All Games or via the Wrye Bash Discord. Be sure to read the first post for information on installation, troubleshooting, reporting bugs etc. If you are having trouble, you'll find many friendly people there who can help.  Check out the 2nd post to see the list of known bugs, and, more importantly, whether the bug has already been fixed.


Basic information is in the OP of the Wrye Bash topic at the AFKMods forums linked to above. For more information visit:

The General Readme can be launched from inside Bash by clicking the question mark icon on Bash's toolbar.

Requirements and Installation:

Short Sersion:

Just use the installer and install to the Fallout: New Vegas folder! When you install dependencies, just install them to their default locations.

Long Version:

There are two versions available: the Python version and the Standalone version. They are functionally equivalent. Most people should run the Standalone version since it is slightly simpler (no external Python components to install). The Python version allows you to follow the rapidly developed code.

Dependency installation for the Python version can be automated with pip. See the installation sections on the Advanced Readme for detailed instructions.

Note that the 64-bit versions are required, we no longer support 32-bit operating systems.

  • For manual installations of either the Standalone or Python versions, extract the archive in your Fallout: New Vegas game folder so that the Mopy directory appears in the Fallout: New Vegas directory
  • For Python versions, run by double-clicking on Wrye Bash Launcher.pyw
  • For WBSA (Wrye Bash StandAlone), run by double-clicking on Wrye Bash.exe

Remember, don't install Fallout: New Vegas in the Program Files folder due to User Account Control!
See also File Permissions.

Version History:

For changes from all previous versions, see the Version History.