Elemental Kingdoms was a playerworld designed and implemented by Falco. It was eventually shut down, ostensibly due to lack of staff and problems brought upon by the switch to GS2.
Started as four nearly empty maps and a playerhearts system, now using several custom systems with a near complete main map and four sidemaps in development. Elemental Kingdoms is no longer playable, as the subscription has run out.
Custom HP and damage system. Creative experience and power systems. Many weapons. Ability to specialize with class and element, and there were plans to have subclasses as well. There was a custom battle system in heavy development and, including Falco, about three or four staff that actually did any work. There were mines, mineral mines, an upgrade shop, a weaponsmith, and more. The server was recently shutdown, however, and thus these things won't be completed.