I remember Night Below. That campaign was the last one I was a PLAYER in! Sure I've been in adventures and "linked" adventures but that was the last real campaign I played.
It was back in highschool, good Ol' 1997-1999. The campaign took us 2 years to run through (AD&D 2E) and our DM, being a Math Major decided to calculate how much time in game had passed. Our characters barely aged a year when we ourselves aged 2 and a bit.
I remember our DM throwing every last bad guy in the entire city of the glass pool as an epic pre-end-boss fight. Once again Mr. Math Wiz pulled out his calculator and gave us 11.5 million XPs each (though back in those days you could only go up 1 level at a time, our DM graced us with 3).
Then the epic fight came... and ended in one round. Our mage/cleric teleported next to (Unpronouncable name) and cast Ressurect reverced (Destruction) and the DM fumbled his save AND his magic resistance roll and it crumbled to dust in front of our eyes.
Then, like a bad villian in a video game, the entire place crumbled to dust and sunk to the bottom of the sunless sea... and we were DENIED LOOT!!!
It was a sad, anti-climactic day... but one I still remember (and I don't remember Yesterday!)
I once took the liberty of converting it to 3.5 for a group. It took me like 140-odd hours, but I was lazy. Then, as a reward for my efforts, the group broke up and I eneded up not using the conversions. Now they are lost in a binder somewhere, probably in a dump because I can't find it for the life of me.
I still have the very boxed set of the game I played in, with all its parts! Eventually I'm thinking of converting it to 4E because the group I'm DMing for now has hung on to my adventures for 2 years, and I think they'll stick arround for somthing that epic.