Install Workshop Mods on Your Arma 3 Server

Updated 10 June 2026 · By Host Havoc Technical Support Team

Installing mods on your Arma 3 server is straightforward using the Steam Workshop integration in your game control panel. For working with PBO files directly, see the guide on PBO files.

  1. Log into your game control panel.
  2. Click the Steam Workshop icon on the left-hand side of your panel.
  3. Find the mods you want to install and click Install. You can also install an entire Workshop collection.
  4. Once installed, open the Commandline Manager from within your panel and edit your custom command line.
  5. Most mods go in the -Mods parameter. Some mods require the -servermods parameter instead. The mod's documentation will indicate which is needed.
  6. Enter the mod folder names separated by semicolons. For example, to load three mods:
    @MyMod1;@MyMod2;@MyMod3;
  7. Save the command line and click Select on the right-hand side to activate it.

Manual Method

Note: The automated Steam Workshop method above is preferred. Use the manual method only if a mod is not available on the Workshop.

  1. Set up an FTP client such as FileZilla. See how to use an FTP client for connection details.
  2. Download the mod or addon pack you want to install.
  3. Connect to your server via FTP.
  4. Drag and drop the addon folder (the folder name must start with an @ symbol) into your server's root directory.
  5. Log into your game control panel and open the Commandline Manager.
  6. On the Custom Commandlines tab, create a new custom command line if you have not already done so.
  7. Edit your custom command line. Place the mod in the -Mods parameter or -servermods parameter as appropriate.
  8. Enter the mod folder names separated by semicolons:
    @MyMod1;@MyMod2;@MyMod3;
  9. Save the command line and click Select on the right-hand side to activate it.