From the website:
Established in South Korea in 1994, Nexon Corporation is a pioneer of interactive entertainment software and the world's leader in massively multiplayer online games. Since its development of the world's first graphic MMORPG, "The Kingdom of the Winds", in 1995, Nexon's innovative titles have continued to redefine online entertainment.
Nexon America is the publishing arm of Nexon for the US market:
Anticipated to redefine and expand the North American online games market, Nexon America is the North American publishing arm of Nexon Corp. Founded in 2005, Nexon America is dedicated to bringing the best of online entertainment to the North American audience.
Country: Korea, Republic Of