Dev error 5820 is a frustrating issue that can disrupt your Modern Warfare 3 gameplay, especially in Private Matches.

Here’s a breakdown of the most effective methods to solve dev error 5820 in MW3:

While the exact cause of this error is unknown, several potential solutions have been found to work for many players.

How to fix dev error 5820 in MW3

MW3 operator in shooting stance
Credit: Activision

Before going for long fixes, you can try the easy ones like restarting your game. Rebooting the game again fixes any small problems.

Call of Duty Black Ops 6 preorder: Secure your Mastercraft Ultra weapons

You can also try to change the hosts of the private match you are trying to join. Also, try to keep trying repeatedly to join the private matches, sometimes it starts working after trying a bunch of times.

It is also important to check the latest game updates and if you have a stable internet connection. You can also try to clear the game cache. Often these minor things can raise the MW3 5820 error.

Modern Warfare's main character John Price in ONE Esports' featured image for full list of Modern Warfare 3 guides, including best settings, loadouts, and more
Credit: Activision, ONE Esports
Modern Warfare 3 guides: Best settings, loadouts, Zombies

Other fixes for MW3 5820 error

Other fixes that you can try to solve the Dev error 5820 in MW3 are:

  • Verify game files (Steam): If you’re using Steam, verify the integrity of your game files to ensure no corrupt data is causing the problem.
  • Tweak Private Match settings: Experiment with different settings like reducing bot count, changing the match timer or altering the map and game mode.
  • Disable On-Demand Texture Streaming: This setting can sometimes interfere with game stability. Find it in the Graphics settings and turn it off.
  • Change Calling Card or Emblem: A strange but effective workaround for some players is to change their Calling Card or Emblem.
Ranked Play Operators at 6 Starin ONE Esports' image for the best Ranked Play loadouts in Modern Warfare 3 Season 5
Credit: Activision, ONE Esports
Best Ranked Play loadouts for MW3 Season 5 to rank up fast

Please note: While these solutions have helped many players, there’s no guaranteed fix for Dev Error 5820. It’s possible that the issue lies on the server side or with specific hardware configurations.

If none of these methods work for you, consider contacting Activision Support for further assistance.

READ MORE: How to get Reflect 115 camo in Modern Warfare 3, Warzone, and Warzone Mobile