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In Mugais' classification, I would swap Rampart and Tower (as has been mentioned here many times) and switch Fortress with Conflux (honestly, shouldn't a group of elementals be truly neutral?). Also, perhaps Dungeon should be NE, and Necropolis LE.
However, I disagree with XEL's classification. XEL, it seems to me, is based on personal preferences rather than objectivity. Necropolis is evil, not neutral. Inferno is CE; note that this doesn't mean they are mindless destroyers incapable of intrigue; it means they would sell their own mother for their own benefit.
Someone here mentioned Fess Perumov; essentially, he is a typical CG.
In general, the game that best defines worldview is Planescape: Torment.

