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 in 2005. The game was DFO is one of the most-played and highest-grossing video games of all time, exceeding a total of 700 million players worldwide and having grossed over $15 billion in lifetime revenue as of May 2020. This also makes it one of the highest-grossing entertainment media products of all time. The game has received Japanese anime and manga adaptations.
