Innovation. That's what Nexon is all about. A pioneer in the world of interactive entertainment software, we introduced the world to the first graphic MMORPG, The Kingdom of the Winds, back in 1995. Since then, we've become the industry leader in massively multiplayer online games, continuing to redefine the genre with each of our innovative titles.
Notably, we developed the world's first internet quiz game, QPlay, set a world record of 700,000 concurrent users in China with our smash hit Crazy Arcade BnB, and developed the most played online game in South Korea (played by over 30% of the population), KartRider, which is considered to be the national game in Korea. Additionally, Dungeon Fighter Online has set a new world record with over two million concurrent users since its release.
We also pioneered the Item Selling (microtransaction) business model, thus giving our users complete access to all of our games for free, with the option to expand their gaming experience by purchasing game enhancements (virtual items) such as avatar customizations and pets. What we did, in essence, was revolutionize the online gaming industry by dispelling the notion that online games are only being played by a marginal group of hardcore gamers. We proved that online games are a progressive, mainstream form of entertainment to be enjoyed by everyone clear across the demographic spectrum.
We're also out to prove that our vision of online gaming entertainment extends beyond any international boundaries. Just as we redefined the online gaming industry in Asia, we're poised to revolutionize the online gaming scene in North America.
Our first U.S. release, the global phenomenon, MapleStory, combines classic platform elements into a massively multiplayer online format. With over 95 million users worldwide, the game has amassed over six million users in North America in only a few years.