Arma 2: Army of the Czech Republic Multiplayer

As you know, Gamespy, the system that has been handling the majority of the multiplayer in many of our games is shutting down. There is no reason to worry however, as there is another method to play online.

Games affected:

  • Arma 2
  • Arma 2 Operation Arrowhead
  • Arma 2 Combined Operations
  • Arma 2 Complete Collection
  • Arma X Anniversary edition
  • All the Arma 2 DLCs
  • Arma Cold War Assault
  • Arma Armed Assault
  • Arma Gold
  • Take On Helicopters


How to connect to server?

In order to connect to a server you need to know the its IP address and port. Usually, these can be obtained from the server host (in most cases, they would have a website with the server details). Once you know those, follow the steps bellow to connect:


1. Select Multiplayer.


2. Choose Remote.


3. Enter IP address of the server. Do not forget to change the port and then continue with OK


4. Select the server and click Join

Arma 2: Army of the Czech Republic Game activation Arma 2: Army of the Czech Republic Steam

You do not have to be always online. You can launch the game with Steam in offline mode.

If you want to switch to the offline mode please click on Steam (top right corner in your Steam window).

Select "Go Offline..."

And restart your Steam client.

Please note that you will not be able to play multiplayer while in offline mode.

You can also switch auto-updating feature of the Steam off:

Right click the game in your Steam library.

Select "Properties"

Under the "UPDATES" you can change settings for automatic updates

Please note that most of the servers will run on the latest version of the game.

Arma 2: Army of the Czech Republic Game activation

Step 1: Make sure you have the Steam client installed

If you do not have Steam installed, please follow this link to download and install it.

Step 2: Run Steam as Administrator

  • Right-click on the Steam icon.
  • Click "Run As Administrator." If this choice is unavailable, you are already logged in as Administrator. In that case run Steam normally.

Step 3: Activating your game

Click on the Games tab in the menu in the top of the client.

Then select Activate a Product on Steam from the menu.

Click the Next button until you get to this screen:

There you can enter your CD key.
Then click Next again. Your game is now activated and you can download it the same way you download any game on Steam.

Please note that this will work only for Arma 2, Arma 2 Operation Arrowhead and all Arma 2 DLCs. Also, you can only activate your game on an account where the game has not been activated yet.

Arma 2: Army of the Czech Republic Steam

Before you start, make sure you have done the following:

Have Steam running as an Administrator

Have the Arma 2 and Arma 2 Operation Arrowhead installed.


If you did all of the above you should now download the DLC files from as you would with any other Steam game (go to your library, select the desired product and click "install"). After the download finishes, click "play" and the DLc should automatically install the remaining files necessary for you to play it. Alternatively, you can just start your Arma 2 Operation Arrowhead. It should detect the DLC files automaticaaly and install them by itself before launching.


Please note that the Arma 2: Army of the Czech Republic DLC will not appear in your steam library as the other two DLCs do. Instead, it will be included in your Arma 2 Operation Arrowhead directly (you should still see the install window during your first time launch though).

Arma 2: Army of the Czech Republic Missing content Arma 2: Army of the Czech Republic Steam

There are several possible fixes for this issue.

First, run Arma 2 once. Then try to run Arma ACR (without beta or DayZ).  If that won't help you can try to verify game cache of the Arma 2 and Arma OA.

1.) If that will not help, follow this guide:

  2. Exit Steam.
  3. Right-click on Steam icon.
  4. Left-click on "Run As Administrator".
  5. If the problem persists, reboot your computer and try the procedure again.


  1. Exit Steam, open Start menu and type this directly into the menu (in Windows XP, you will have to click on "Run" first) regedit
  2. Press Enter.
  3. In regedit window, click on HKEY_LOCAL_MACHINE.
  4. Press CTRL+F to bring up search.
  5. Look for "ArmA" (without the quotes).
  6. Delete all the "ArmA" entries you find from the registry.
  7. Run Steam as Administrator.
  8. Right-click on the game in Steam Library.
  9. Click on "Properties".
  10. Select "Local files" tab and click on "Verify integrity of game cache files" button.
  11. Please wait, the process can take several minutes.


  1. Go to Steam's installation folder.
  2. Delete everything there except "steam.exe" and "steamapps" folder.
  3. Run "steam.exe" - Steam will reinstall itself automatically.
Arma 2: Army of the Czech Republic Steam

We contacted Steam regarding this problem and Steam recommended this steps:

1] Exit Steam.

2] Open Internet Explorer, Safari or Firefox and type steam://flushconfig then press Enter. (If asked to allow this website to open a program, please click 'Allow' or 'OK')

3] When prompted by Steam to reset your configuration, click 'OK' to confirm.

4] Once done, you need to login to Steam.

5] Now please completely uninstall and reinstall the game and retest the issue.


Side note: in case of multiple installation folders for games doing this process will remove them and you will need to add the folders again in Steam so that your games will appear as installed.

In order to add these extra installation folders please do this:

1] Open Steam
2] Click Steam > Settings (Preferences on Mac)
3] Navigate to the 'Downloads' tab
4] Click the 'Steam Library Folders' button
5] Click on 'Add Library Folder' and add the directory that contains your games
6] Click 'OK'
7] Restart Steam


It is also a good idea to make sure your network is properly optimized for Steam:

Title: Troubleshooting Network Connectivity

Additionally, disabling any programs from this guide may also help with the issue:

Title: Programs Which May Interfere with Steam

Arma 2: Army of the Czech Republic Crashes

If you have any other issues with Arma please send us the following info:

Screenshot of the error. Please use FRAPS for making in-game screenshots.

RPT file of Arma 2 OA (arma2oa.rpt). It can be found here:

  1. If you have Windows Vista or later, please open Start menu and paste this directly into it: %userprofile%\AppData\Local\ArmA 2 OA
  2. then press Enter. You should be taken directly to the folder with arma2oa.rpt.

If you have Windows XP, please open Start menu, click on Run and paste this into Run window:
%userprofile%\Local Settings\Application Data\ArmA 2 OA

Then press Enter. Same as before - you should see arma2oa.rpt.


  1. Open the Start menu.
  2. In Windows XP, click on 'Run'. In Vista/7, continue to step 3.
  3. Type 'dxdiag' (without the quotes).
  4. Press Enter.
  5. In dxdiag window, click on 'Save All Information' button.
  6. Send us the resulting file as email attachment.

MSINFO report of your computer for checking (no sensitive personal information will be collected):

  1. Open the Start menu.
  2. In Windows XP, click on 'Run'. In Vista/7, continue to step 3.
  3. Type 'msinfo32' (without the quotes).
  4. Press Enter.
  5. In MSINFO window, click on 'File' in the upper menu.
  6. Click on 'Save' button.
  7. Send us the resulting file in the form below.

Thank you.