Finished this one last night and was very impressed. There were some silly inconsistencies but overall it was great. Never played the game. My biggest complaint is that we never got to see Goosie's boobs and the ghoul didn't eat her finger after he cut it off.
Two questions:
Spoiler!
1. How did some surface people turn into ghouls but others didn't? The only explanation I caught is the elixir salesmen and no way he caused all of them.