Question: Dark Ages was developed by which South Koream online gaming company?

Context paragraphs:
Fairground Gaming: Fairground Gaming was an online gaming company traded on the Alternative Investment Market of the London Stock Exchange as FGH.L.

TonyBet: TonyBet is an international online gaming company providing sports betting, live betting and live gaming services.  The TonyBet website offers a unique live gaming service allowing the players to place bets on lottery, casino, poker and other games live.

Protogeometric style: The Protogeometric style (or "Proto-Geometric") is a style of Ancient Greek pottery led by Athens produced between roughly 1050 and 900 BC, the period of the Greek Dark Ages and the beginning of the Archaic period.  After the collapse of the Mycenaean-Minoan Palace culture and the ensuing Greek Dark Ages, the Protogeometric style emerged around the mid 11th century BCE as the first expression of a reviving civilization.  Following on from the development of a faster potter's wheel, vases of this period are markedly more technically accomplished than earlier Dark Age examples.  The decoration of these pots is restricted to purely abstract elements and very often includes broad horizontal bands about the neck and belly and concentric circles applied with compass and multiple brush.  Many other simple motifs can be found, but unlike many pieces in the following Geometric style, typically much of the surface is left plain.

Nexon: Nexon (Hangul: 넥슨 ; RR: "Nekseun " ) Co., Ltd. is a South Korean global leader in online games for PC and mobile.  It services over 100 titles in over 190 countries.  Nexon was founded in Seoul, South Korea in 1994 by Kim Jung Ju and Jake Song.  In 2011, Nexon moved its headquarters from Seoul, South Korea to Tokyo, Japan.

Fun88: Fun88 is an online gaming company in Asia that offers sports betting, live casinos, slots and keno games, all of which are available in multiple languages.  Fun88 is licensed and regulated by the Isle of Man and is certified and audited by Gaming Associates, an Australian testing and auditing house for interactive gaming.

Online gaming in China: Online gaming in China represents one of the largest and fastest growing Internet business sectors in the world.  With 457 million Internet users currently active in the PRC, the country now has the largest online user base in world, of which two-thirds engage in online game play.  The average online gamer in China is relatively young (18 to 30 years old), male, and has at least completed a secondary level of education.  Demographically the online gaming user base in China is very similar to base of China Internet users, most of whom live in larger cities.

Dark Ages (1999 video game): Dark Ages is a MMORPG based on Celtic mythology, originally developed by Nexon and now operated by KRU Interactive.  It is loosely based on the Korean game "Legend of Darkness".  The American version was developed by David Ethan Kennerly who based it somewhat on the works of horror writer H. P. Lovecraft.  The game originally thrived on player involvement in the management of the game and progression of the storyline, even going so far as allowing players control over in-game politics and laws.

Sega Meganet: Sega Meganet, also known as the Net Work System, was an online service for the Mega Drive in Japan and later Brazil.  Utilizing dial-up Internet access, Meganet was Sega's first online multiplayer gaming service, and functioned on a pay to play basis.  The system functioned through the use of a peripheral called the Mega Modem and offered several unique titles that could be downloaded, and a few could be played competitively with friends.  In addition, it shared technology and equipment with more serious services such as the Mega Anser, used for banking purposes.  Though the system was announced for North America under the rebranded name "Tele-Genesis", it was never released for that region.  Ultimately, the Meganet service would be short-lived, lasting approximately a year before it was discontinued, but would serve as a precursor to the Sega Channel and XBAND services, as well as a predecessor to online gaming services for video game consoles. Retrospective feedback praises the attempt by Sega to introduce online gaming, but criticizes the service for its logistical issues and lack of titles.

Ruth Parasol: Ruth Monicka Parasol founded PartyGaming, the parent company of online poker site PartyPoker.com, in 1997.  The company merged with Bwin Interactive in 2010 to form Bwin.Party Digital Entertainment plc., then the world’s largest publicly traded online gaming company.  Parasol is the single largest individual stakeholder of Bwin.Party Digital Entertainment.  PartyGaming issued its initial public offering (IPO) on the London Stock Exchange in June 2005.  In 2006, Parasol was ranked 197 on The Forbes List 400.  In 2008, Parasol and her former husband Russ DeLeon were ranked 97 on the Sunday Times Rich List.  In 2010, The Economist magazine ranked her 15th of the world's richest self-made women.  In 2012, The Sunday Times List ranked her 14th among UK women.

Jolt Online Gaming: Jolt Online Gaming was an online gaming company hosted in Ireland.  Its main site provided news, reviews, and interviews concerning upcoming games on consoles and computers, while its gaming network Jolt Online Gaming Network hosted and published free-to-play browser-based games.  Notable works included "Utopia", "Utopia Kingdoms", "Legends of Zork", and "NationStates 2".

Supporting paragraphs: Dark Ages (1999 video game) Nexon
Answer: Nexon