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Champions of Regnum (previously known as Regnum Online) is a fantasy massively multiplayer online role-playing game (MMORPG) developed by NGD Studios, a game development studio located in Argentina. The game focuses on full Realm vs Realm team player vs player combat, with a three-way war constantly in progress over forts and castles. There are monsters and an element of grinding, but these are considered secondary to the war. It was released May 24, 2007.