Ragnarok Valkyrie Uprising is a role-playing game developed by NEOCYON for Android and iOS.
A thousand years ago, after an exhausting hundred year war with the demons, the humans of Mid-gart forged a fragile truce with the scourge of the Underworld. Fourty years ago, Valkyrie Randgris threatened the human world using a powerful item stolen from the Underworld, the Cursed stone, but Monica, from the Celestial Land of Valhalla, defeated Randgris and was able to seal her away, never to be seen again. Today, a mysterious women has broken the seal, but in the process disappeared. Once again the dark powers of Randgris and her Cursed Stone are free to terrorize the human world.