In the German gaming magazine PC Player (issue 01/1994) Ultima Underworld II: Labyrinth of Worlds was named "Best Game of 1993".
In Nystul's library in the castle, you'll find one of the chests is locked and can't be opened.
The only way to open it is to leave the castle and enter any of the eight worlds through the blue gem down on the 5th level (doing so will allow you to cast spells in the 4th circle or above).
Cast 'Open' (the cursor will change) and return from the blue gem and back to the castle. Open the chest and you'll find the book Nystul was hiding... "Sex" by Madonna!
Apparently, the Florida Department of Corrections have adopted the Virtues of the Guardian as their official virtues.
http://www.dc.state.fl.us/pub/compass/0305/2.html (scroll to the bottom of the page)
Hmm... I realize that the Virtues of the Avatar could be a bit too touchy feely liberal for the organization. Still, did they really have to go so far as to emulate a guy who wants to take over the universe?
The cat-like Trilkhai, which bear the suspicious resemblance to the Kilrathi, have yet another thing in common. The word 'Trilkhai' is an anagram (uh... you rearrange the letters, see?) of the word 'Kilrathi'.
In Killorn Keep there is a cat like creature called Blackie that you can talk to. He tells you the story of his race, the Trilkhai, which has a striking resemblance to the Kilrathi of the Wing Commander games (also by Origin). The other Ultima game released around the same time (Ultima 7) also has a reference to the Kilrathi and it has been infered that the space ships fought in Ultima 1 are actually Kilrathi fighters.
If you delete the shades.dat in the DATA subdirectory, you don't need torches or lamps in your quest any more due to the lack of shade maps. (Of course, this also means that every single environment you're in looks like daylight, which ruins the mood -- Ed.)