The King of Fighters Online (더 킹 오브 파이터즈 온라인) was a MMORPG produced by UnoTechnology, a Korean company which was formerly known as Viccom, and had all rights reserved from The King of Fighters '94 to The King of Fighters 2000. It was a 3D online fighting brawl where players could chat or perform their avatars' trademark moves on one another. Its official website was titled KOF World.
The game was first announced sometime in late 2000 and leaks of character models were briefly posted over the net. Plans for an international release were made but eventually the game was scheduled to stay in Korea. An open beta service was made available for the Korean audience on April 15, 2003 and was planned to last until June. However, apparently due to poor reception, the beta ended early. The company wrote a statement about wanting to improve the game's quality for a better playing experience and simultaneously announced a beta for "The King of Baitos Online". Interests in the project seems to have fizzled out since the official website was taken down soon after. A patch and other upgrades were said to be in the works.
In 2007, the license for another The King of Fighters Online adaption was given to the Korean developer DragonFly. It was given a tentative of release in 2009, but the game was later cancelled.