Inferno's Breach is based on a box set I played in junior high. The main map took over a whole dinner table. But we never got far in it because:
a) As stated before I haven't played actual D&D that much (I actually forgot about playing this until a few weeks ago)
b) The DM kept making us start over at the beginning. Including paying to get in over and over again.
I fully expect some people to think I based it on Diablo because there are some similarities. I have played Diablo but I never got very far because it was something I'd play at my friends house until he decided he needed a rematch in Mortal Kombat 3.