The billionaire founder of gaming giant Nexon Co Ltd, Kim Jung-ju, has died at the age of 54, parent firm NXC Corp said on Tuesday. Tokyo-listed Nexon was founded by Kim in 1994 and became one of the biggest game developers and publishers, with hit online games such as MapleStory and KartRider. "Kim Jung-ju, the director of NXC and founder of Nexon, passed away in the United