Firefly Studios, creators of the Stronghold series and free-to-play MMORTS Stronghold Kingdoms, hit a major milestone this week with 500,000 registered players.

Yesterday Kingdoms’ 500,000th player joined ‘World 4’, bringing the total number of Lords and Ladies to half a million. World 4 is the game’s newest English-language server, launched on Saturday 3rd March to keep pace with the recent influx of new subscriptions that is showing few signs of subsiding. Achieving this milestone puts Firefly half-way to achieving their goal of one million registered players, which it is hoped can be achieved with new markets and platforms. Firefly does not expect World 4 to be the last opened in 2012.