How to fix Dev Error 356 in MW2

Call of Duty Modern Warfare 2 released in October 2022 and brings explosive gameplay and photo-realistic graphics to the series. With a popular launch and numerous players logging in, some issues have appeared, including the Dev Error 356. This may leave you wondering how to fix the Dev Error 356 in Call of Duty Modern Warfare 2.

How to fix the Call of Duty Modern Warfare 2 Dev Error 356

Unfortunately, there is no real way to fix this on your end. The Dev Error 356 issue seems to be related to the developer's side of things, meaning you will need to wait for Infinity Ward and Activision to fix this error. This will likely be done in a patch or update.

Related: How to finish ‘Alone’ without firing a gun – MW2 Campaign Guide

In the meantime, there are a few things you can try to fix this issue until the developer remedies it. You should first make sure that your game is up to date, regardless of platform. After that, you can try changing the in-game language from your current one and then returning to it, as some players have reported success with this method.

Finally, you can try uninstalling and reinstalling Call of Duty Modern Warfare 2, but we recommend this as a last resort because of the game's size. Ultimately, you will need to wait for the developer to push out an update or patch that fixes the Dev Error 356 in Call of Duty Modern Warfare 2.

For more information on Call of Duty, check out Best MW2 Kastov 545 Loadout – Attachments & Class and Best MW2 Lachmann-762 Loadout – Attachments & Class on Pro Game Guides.