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"The land of Boletaria in Demon's Souls will be plunged into \"pure blackness\" on Halloween for players connected to the internet. Publisher Atlus' announcement about its sleeper hit can be interpreted to mean that all players will have their world tendency shifted to black for the day (or a little longer), which affects enemy strength and player stats. A pure black tendency can mean that new passages and enemies may also exist.   \"World Tendency\" in Demon's Souls is another aspect of the challenging RPG that has a significant impact on the player's experience. If you're a new player who happens to pick up the game on Halloween ... don't panic. Yes, the game is hard, but it'll be a little bit more so with the entire world black aligned."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2009/10/29/demons-souls-to-be-even-harder-on-halloween/>