Dungeon Keeper Online (地下城守护者OL), originally known as Dungeon Keeper World, was a MMORPG based upon the Dungeon Keeper series. It was announced on December 1st, 2008 by NetDragon Websoft Inc., an online game developer based in China. It has two modes; a land mode, and the dungeon mode, which incorporate elements of World of Warcraft and Dungeon Keeper respectively. The game was made available only in China, Taiwan, Hong Kong and Macau. The servers running the game shut down on 20 December 2013.