Though it hasn't launched in North America, Lineage II is making quite a splash in South Korea. The sequel to the world's most popular online role-playing game (with more than a million subscribers) launched in South Korea in October, and it's been racking up impressive numbers ever since. As in most online role-playing games, in Lineage II you create a character to explore a vast virtual world that's populated by thousands of other players. You hunt monsters and battle other players in the never-ending quest for prestige and better equipment. But Lineage II differs from most online role-playing games because it incorporates an intriguing political and economic system that allows players to band together to rule the countryside. Aaron Rigby, the North American producer for Lineage II, visited the GameSpot offices recently and filled us in on how and why it is so important to capture castles in the game.