To play ExtremeMS, click the button below to download the latest client.
To play ExtremeMS you must have the required setup files, you can check what version ExtremeMS is currently on from our main page. If you're having trouble finding that you can join our Discord if you have more questions.
After downloading ExtremeMS from the link we provided, run [Ex Connector].exe as administrator and download the patch. Once the patch has finished downloading, the game will run.
You might be using a lower version of MapleStory or have an outdated ExtremeMS Client. If that is not the case your installation/client may be prevented by your antivirus or firewall, please allow both the folder and [Ex connector].exe as an exclusion.
If you are still in need of assistance we encourage you to join our Discord and find the support channel, there you should find someone to help you install the game or any other needs you might have!
For adventurers who are unable to connect due to this error, please disable all antivirus programs and Windows Defender, and then extract the client zip file again.
Refer to the link below for instructions on how to disable Windows Defender real-time protection.
Additionally, because the real-time protection feature of Windows Defender automatically reactivates when the PC is restarted, it is recommended to set an exception for the folder where the client is located.
Please install .NET Framework 4.7.2.
Please change your system locale to Korean.