Firefly Studios proudly announces that Stronghold Kingdoms has registered more than five million players since the launch of this free-to-play MMOG based on their siege warfare series. "We launched in the very early days of free to play. A single payment seemed like a pipe dream, let alone five million players," said Nick Tannahill, Business Development Manager at Firefly Studios. "At the time MMOs of this type had around a three-year lifecycle and Kingdoms had its first closed alpha back in 2009. As such its success, particularly with our conversion and ARPPU which are both far above average for this industry, is still hard to believe. We can’t wait to release the new redesigned mobile version on iOS and Android, something players are really looking forward to."