Dungeon Fighter Online is a multiplayer PC beat 'em up video game developed and published by Neople, a South Korean subsidiary of Nexon, and originally published by Hangame. The game was originally released in Korea as Dungeon & Fighter (던전앤파이터) and in Japan as Arad Senki (アラド戦記 Arado Senki, lit. War Records of Arad). Closed Beta for an English version of the game ran from July 28, 2009 to August 3, 2009. Early access has begun on September 15, 2009. Open beta started September 22, 2009. It was featured in WCG 2009, and is still a popular televised program in South Korea, where a league is active. Dungeon Fighter had a 300 million registered users celebration on May 25, 2011. It was announced on April 2, 2013, that the North American version of Dungeon Fighter Online would be shutting down on June 13, 2013.
On May 15, 2014, Neople began an alpha test of a global version of Dungeon Fighter Online using the last English version hosted by Nexon, which has since ended. On October 10, 2014, Open Beta Testing was announced, set for March 24, 2015. The game had 600 million players worldwide, and has grossed more than $10 billion in revenue.