* ContractualImmortality: Characters like Fell and Lothar are Planescape regulars, hence they cannot be killed.
* WhatCouldHaveBeen:
** Looking at the pitches and design documents for Last Rites (the game's original name) and seeing just how much stuff didn't make it into the final product can be downright depressing.
** 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.