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GungHo Online Entertainment, Inc. (Japanese: ガンホー・オンライン・エンターテイメント株式会社, Hepburn: Ganhō Onrain Entāteimento kabushiki gaisha) is a Japanese video game developer and publisher. Their most prominent game is the mobile game Puzzle & Dragons, originally published in 2012 but still a major game in 2025, and the source of the vast majority of the company's revenue in the 2010s and 2020s. They are also known for hosting the Japanese server of Ragnarok Online, developed by its listed Korean subsidiary Gravity.