Contractual Immortality: Characters like Fell and Lothar are Planescape regulars, hence they cannot be killed.
Multi-Disc Work: The game comes on four C Ds, with the German version having an additional disc for the manual and patches, but the Polish version only having two discs.
A novel whose writers appeared to have not played the game, nor even had a particularly in-depth discussion with the game's makers about its content, other than the basic plot and a list of major character names. Annah, for instance, changed from a fiery, red-headed embodiment of withering sarcasm to a big-breasted bouncy blonde. She lost her distinctive accent, too.
An early draft of the plot the novelization was based on, and further plot development with Fhjull Forked-Tongue, whose interaction ends up a bit rushed in the release version.
Lustmord had originally been approached to work on the game's soundtrack, but was dropped from the project after a new producer took over.