MW3 Dev Error 6015, How to Fix Modern Warfare 3 Dev Error 6015?

Call of Duty Modern Warfare 3 Wiki

“Call of Duty: Modern Warfare III” is a new game launched on November 10, 2023. It is the twentieth game in the “Call of Duty” series and the third in the “Modern Warfare” series. In this game, you play as a special operations force called “Task Force 141”, and your mission is to prevent a Russian terrorist named Vladimir Makarov from triggering World War III. The game features a single-player story mode and a multiplayer mode featuring maps from previous games in the series.

It also introduces Zombies mode, where you fight against hordes of the undead in an open world. Modern Warfare III is developed by Sledgehammer Games and uses IW engine version 9.0. While many were excited about the game, others criticized the campaign mode for being too short and disliked the level design.

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MW3 development error 6015

“MW3 Dev Error 6015” is an issue encountered by players in the video game Modern Warfare 2. This is a bug that affects game performance and causes problems for players. Despite the game’s successful launch and positive response from the community, these bugs have been an issue since the beginning.

This error is famous for being frustrating because there is no permanent solution to fix it. Players experience performance bugs and bugs that impact their overall gaming experience. Specifically, “Dev Error 6015” is a code that pops up indicating that there is an issue with the game.

Although there is no permanent fix for this bug, some players in the community have come up with temporary solutions or workarounds to fix the issue on their own. These solutions may help improve the situation for some players, but it’s important to note that they are not long-term solutions.

If you’re encountering “Development Error 6015” in Modern Warfare 2, you may want to look up community guides or follow temporary steps suggested by other players to try to improve your gaming experience until the developers release a permanent solution.


What is the cause of MW3 development error 6015?

The following are the causes of “Modern Warfare 3 Development Error 6015”:

Corrupted game files:

  • This error occurs when there is an issue with the game files in the Modern Warfare 3 installation directory.
  • Corruption in these files may cause performance issues and display a “Dev Error 6015” code.

Version mismatch:

  • Outdated game versions may be the main cause of “Development Error 6015”.
  • Updating your game to the latest version is crucial to avoid compatibility issues that may trigger this error.

Game server maintenance:

  • The error can also occur when Activision takes game servers offline for maintenance.
  • During server downtime, trying to access the game may result in an error code.

Black screen appears during startup:

  • Game file issues or server issues may cause the entire screen to go blank during startup.
  • This blank screen is a precursor to the “Dev Error 6015” message code.

Incomplete or incorrect updates:

  • If the game update process is incomplete or there is a problem with the downloaded patch file, it may cause errors to occur.

Lack of regular updates:

  • Failure to update your game regularly increases the likelihood of encountering “Development Error 6015.”
  • Regular updates are essential to maintain game stability and resolve potential issues.

Server status issues:

  • It’s important to check the server status, as errors may be attributed to issues on Activision’s part.
  • If a server is down for maintenance, players will need to wait until the server is up again before they can attempt to play the game.

How to fix Modern Warfare 3 development error 6015?

If you are encountering the “Modern Warfare 3 Dev Error 6015” issue, it is most likely due to a problem with the game files or the game server is undergoing maintenance. When this error occurs, the screen may go blank and a message containing an error code may appear. Here are some simple steps to try to resolve this issue:

Repair game files:

  • For Steam and clients, go to game settings.
  • Select “Scan and repair options”.
  • This will check the game installation directory for any corrupted files and fix them automatically.
  • Many players in the Call of Duty community have found this method helpful in fixing various bugs.

Update the game:

  • Version mismatch may cause “Development Error 6015” issue.
  • Make sure your game is updated to the latest version.
  • On your console, select the game, press the Options button, and select “Check for Updates.”
  • On PC, in and Steam, you can find the option to check for the latest patches in the game settings.
  • Some players also reported that a complete reinstallation of the game fixed the issue.

Check server status:

  • Verify that the game servers are undergoing maintenance, which may cause issues.
  • If the servers are down, you may need to wait until they come back up before trying to play the game again.

These steps should help you resolve “Development Error 6015” in Modern Warfare 3. Remember to follow each step carefully and hopefully your gaming experience will improve without encountering this error.

“Call of Duty Modern Warfare 3” gameplay

The gameplay of Call of Duty: Modern Warfare III is similar to its predecessor, Modern Warfare II, as well as other games in the series. You can swipe to cancel just like before, and in the campaign, there are both linear missions and new “open combat missions” where you can choose how to complete your objectives. In multiplayer, all 16 Modern Warfare 2 maps are available from the start, and you can vote for the maps in the lobby. Player health has been increased, allowing for longer battles.

The game also brings back the “red dot” minimap, so you can see enemies on your radar when they’re firing without a suppressor. There are familiar modes like Confirmed Kills and Hardpoint, as well as a new mode called Cutthroat that pits three teams of three players against each other.

The game will feature artificial intelligence to monitor in-game behavior and report bad behavior. It will release a new multiplayer map and feature an open-world zombies mode where players can work together to complete objectives and fight zombies and AI-controlled enemies in the open map. The game also includes story missions that advance the narrative.

Call of Duty Modern Warfare 3 Overview


Call of Duty: Modern Warfare III


sledgehammer game




call of Duty


Nevada 9.0


PlayStation 4, PlayStation 5, Windows, Xbox One, Xbox Series X/S

“Call of Duty: Modern Warfare 3” trailer

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