Gravity Co., Ltd. is a developer, distributor and publisher of online games in Japan and Taiwan. The Company's segments include online games, mobile games and other. Its principal product includes Ragnarok Online, which is a multiplayer online role playing game. It categorizes products into over three categories, such as online games; mobile games and applications, and other games and game-related products and services, including character-based merchandise and animation. It offers over five online games, such as Ragnarok Online, Ragnarok Online II, Requiem, Dragonica (Dragon Saga) and R.O.S.E. Online, which are action adventure massively multiplayer online role-playing games (MMORPG). It develops mobile games, including Ragnarok Online-Uprising: Valkyrie, Ragnarok Online Mobile Story and Ragnarok Violet, and also publishes mobile games licensed from third parties. It provides games for game consoles and handheld game consoles, such as Nintendo DS, Xbox 360 and the PlayStation series.