Ragnarok Online
By servicing 'Ragnarok Online' of Gravity and 'Seal Online' of Grigon Entertainment in 2002 and developing its own games "" and "Sting (K.O.S)" through its subsidiary developing office, YNK Games, found in 2000, YNK Korea enlarged its business globally and became one of the first online game companies in Korea to listed on the KOSDAQ