Seoul, South Korea, Sept. 25, 2025 (GLOBE NEWSWIRE) -- GRAVITY Co., Ltd. (NasdaqGM: GRVY) (“Gravity” or “Company”), a developer and publisher of online and mobile games, announced that Ragnarok: The Promised Adventure (Tentative English Title, Chinese Title: 仙境传说之约定好的冒险), an adventure MMORPG Mobile game, has officially launched in China on September 25, 2025. Ragnarok: The Promised Adventure retains the classic essence of Ragnarok Online while introducing multi-character training system and automated rewar ...