*Ready or Not* might sound like a kid's game, but it's far from it. This intense SWAT-themed first-person shooter can sometimes throw technical curveballs at players, such as the "Serialization Error Action Needed" error. Here's a comprehensive guide on how to tackle this issue in *Ready or Not*.

How to Tackle 'Serialization Error Action Needed' in Ready or Not

The "Serialization Error Action Needed" error in *Ready or Not* often comes with the message "Corrupt data found, please verify your installation." This is an Unreal Engine error, and there are several steps you can take to resolve it.

1. Verify Your Installation

The first step is to verify your game installation as suggested by the error message. Ensure Steam is not in offline mode, then follow these steps:

• Go to your Steam Library and locate *Ready or Not*.
• Right-click on the game and select "Properties."
• Navigate to "Installed Files" and click on "Verify Integrity of Game Files."
• Steam will check for any missing or damaged files and re-download them if necessary.
• After the process, relaunch *Ready or Not* to see if the issue is resolved. If not, proceed to the next step.

2. Remove Any Mods

The error can also be triggered by outdated or broken mods, especially those not updated for Unreal Engine 5. To remove mods, follow these steps (via CosmoCart):

• In your Steam Library, find *Ready or Not* and left-click on "Manage," then "Browse Local Files."
• Open the "ReadyorNot" folder, then the "Content" folder, and finally the "Paks" folder.
• Delete the "mod.io" folder.
• Try running the game again to see if the error persists.

Related: Ready or Not: What's Better, DirectX 11 or DirectX 12 (DX11 vs. DX12)?

3. Reinstall Your Mods

If removing mods resolved the issue, you can start reinstalling them one at a time. Visit Nexus Mods, Mod.io, or your mod source and check the update date of each mod:

• If a mod was updated after July 2024, when *Ready or Not* transitioned to UE5, it's safe to install.
• Install one mod at a time, launch the game, and check for the error.
• If the error reappears, the last installed mod is likely the culprit and should be skipped until updated for UE5.

If all else fails, consider uninstalling and reinstalling *Ready or Not* from scratch. While hard disk corruption is a possibility, most cases of this error are linked to outdated mods.

That's how you can fix the "Serialization Error Action Needed" in *Ready or Not*. The game is currently available for PC players.