DeNA, Japan's most successful mobile internet company, will offer a free-to-play version of Epic and ChAIR's incredibly successul iOS game, Infinity Blade. Over there it'll be called Infinity Blade X for Mobage, and promises to offer multiplayer and co-op features through DeNA's immensely popular Mobage network -- the game will be free to play and supported by the sale of virtual goods.

Infinity Blade, which is considered a "premium" title everywhere else but Japan (see: it costs more than a buck), was just recently updated with head-to-head multiplayer and survival modes. The game's latest milestone saw it surpass $10 million in sales.

Infinity Blade X for Mobage is scheduled to launch in Japan sometime this fall.