Dungeon Fighter Online, also known as DFO, is a multiplayer beat 'em up action role-playing game, developed and published for personal computers by Neople, a South Korean subsidiary of Nexon, and originally published by Hangame in 2005. The game was originally released in South Korea as Dungeon & Fighter (던전앤파이터) and in Japan as . In China, the game is published by Tencent. In 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.