Dungeon Fighter Online

Dungeon Fighter Online, known in South Korea as Dungeon & Fighter, 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, then in Japan as Arad Senki, and then published in China by Tencent. A global version of Dungeon Fighter Online was released in May 2015.

Dungeon Fighter Online is one of the most-played and highest-grossing video games of all time, with over 850 million registered users worldwide and over $22 billion in lifetime revenue as of June 2023. This also makes it one of the highest-grossing entertainment media products of all time.