In the 1998, NCsoft was opening era of MMORPG(Massively Multi-Player Online Role Playing Game) in Korea. Ten years later, NCsoft has grown most bigger online game development and publishing company both domestic and global. The past decade history of Ncsoft is challenge and counter with change and evolution of Korea online game industry. Now, NCsoft was the time to leap new step based on past successful experience. To accomplish this, it is need to do variety of game line up, to consolidate capability of game development and publishing. It has, also, to overcome side effect like addiction to online game and to cope with the new competition not game industry but rising competitors in others. The key to overcome these issues were new visions and paradigm of business strategy to break from just simple combination of game development and publishing. Thus, this case provides implications for acquiring and sustaining competitive advantage in the past ten years with rapidly changing online game business environment from NCsoft’s growing process.