Ready or Not may sound like a playful game, but it's a gritty, tactical SWAT FPS designed for both single and multiplayer experiences. However, players might encounter the "Serialization Error Action Needed" error, which can disrupt gameplay. Here's a detailed guide on how to resolve this issue in Ready or Not.

How to Fix '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 error is associated with Unreal Engine, and there are several steps you can take to address it.

1. Verify Your Installation

The first step is to verify your game installation as suggested by the error message. Here's how to do it:

• Ensure Steam is not in offline mode.
• Go to your Steam Library and locate Ready or Not.
• Right-click on the game and select Properties.
• Navigate to Installed Files.
• Click on Verify Integrity of Game Files.

This process will scan for any missing or corrupted files and redownload them if necessary. After verification, launch Ready or Not again to see if the error persists. If it does, you may need to try additional steps.

2. Remove Any Mods

The "Serialization Error Action Needed" can sometimes be caused by outdated or incompatible mods, especially those not updated for Unreal Engine 5.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.
• Click on Manage and then Browse Local Files.
• Open the ReadyorNot folder, then the Content folder, and finally the Paks folder.
• Delete the mod.io folder.

This should allow the game to run without mods. However, if you wish to continue using mods, you'll need to reinstall them carefully.

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

3. Reinstall Your Mods

To safely reinstall your mods, proceed as follows:

• Visit Nexus Mods, Mod.io, or your original mod source and locate the mod pages.
• Check the update dates of the mods. Only install mods updated after July 2024, when Ready or Not transitioned to Unreal Engine 5.
• Install mods one at a time, launching the game after each installation to check for the error.

If the error reappears, the last installed mod is likely the culprit. You'll need to skip that mod if it's not compatible with the current version of the game.

If none of these steps resolve the issue, consider uninstalling and reinstalling Ready or Not entirely. While rare, the error could also be caused by a corrupted hard disk, but most cases are related to outdated mods.

By following these steps, you should be able to resolve the "Serialization Error Action Needed" in Ready or Not and enjoy uninterrupted gameplay.

Ready or Not is available now for PC.