NCsoft is a South Korea-based online video game company, which has published massively multiplayer online role-playing games including Lineage, City of Heroes, Wildstar, Exteel, Guild Wars, and Aion.

NCsoft was originally founded in March 1997 by T.J. Kim, a business software developer and author of the Korean word processor Hangul. One of the company's first products was NC HTML Editor. In September 1998, NCsoft launched its first and most popular game, Lineage. Lineage was the first MMORPG to exceed the record of 100,000 concurrent users for the first time in Korea in December 2000. The success of this game helped the company expand to locations in Taiwan, China, Japan, Europe and the United States.