One in six people in China have played Nexon's Dungeon Fighter Online -- the free-to-play 2D action PC MMORPG claimed over 200 million registered users even before its launch in North America, at one point seeing 2.2 million concurrent users. And now Nexon is reaching out for another audience entirely: It's announced that DFO is coming to Xbox Live later in 2011, published by none other than Microsoft Games Studios.

The console version will be jointly developed by Nexon and Korean developer Softmax, and the game's original developer, Neople, will direct the project. There's no word on whether it will be free-to-play or microtransaction-based on Xbox Live Arcade or not -- the original game, like all of Nexon's titles, is supported by sales of in-game items, from gear and potions to XP boosts.

Joystiq has contacted Nexon to find out more, and we'll let you know what we hear. This announcement could be huge -- a free-to-play MMO hit on consoles, especially in the west, would have big ramifications for the gaming industry at large.

Update: "Nothing has been determined yet" about the model for this one, we're told. Nexon says it's too early in the process to talk about exactly how this version of the game will work.