Last fall developer Wargaming.net released Order of War, the latest in what seemed like a flood of WWII themed RTS games. The original game was published by Square Enix as their first game from a Western developer. Now Wargaming.net is releasing a new multiplayer add-on for the game on its own with the announcement today of Order of War: Challenge.

This add-on, to be released via Steam, is designed to be a stand alone product but folks who already own the original Order of War will be able to download and play the Challenge add-on for free. It will have 12 new mutiplayer maps, six new multiplayer maps, four co-op survival maps, and more. There's no word on when it will be release on what folks who don't own the original game will be charged.