Went by the old Hobby Shop in town (one of the last ones these days). I haven't been there in awhile, and lo and behold found some cool stuff in the used RPG section.
I had Night Below many years ago, but sold it off before I ever ran it.
Looking at this pile of coolness, I do believe I need to try to work all of these items together somehow into a cool campaign! Night Below is a great Underdark Campaign, but using the Role Aids books to supplement it could make for an even more awesome setting. Now to just decide what mechanic to use? I'm leaning towards 5E, but Castles and Crusades has been calling out to me, and ACKS is a great system as well. Decisions...decisions!
More to come!