Gravity Co., Ltd Gravity (NASDAQ: GRVY) Introduces 2nd CBT of Ragnarok V: Returns, New 3D MMORPG Gravity Co., Ltd. (NASDAQ: GRVY) has confirmed the launch of the second CBT for a new 3D MMORPG, Ragnarok V: Returns, in Oceania on April 6. Ragnarok V: Returns is