Ragnaork M: Attracting over 1,000,000 Pre-Registration Signups For Southeast Asia Version as of October 15, 2018. Seoul, Oct. 16, 2018 (GLOBE NEWSWIRE) -- Seoul, South Korea – October 16, 2018 – GRAVITY Co., Ltd. (NasdaqCM: GRVY) (“Gravity” or “Company”), a developer and publisher of online and mobile games...