My roomies and I are getting ready to embark on a campaign of Milton Bradley's HeroQuest board game. Out of print since around 1993. It is in my opinion the very best implementation of a dungeon crawl board game ever made. If it has one weakness it is (in my opinion) the limited advancement options for the Wizard when compared to the Barbarian, Elf and Dwarf who are able to buy upgrades in the Armory.
The item based advancement system is easily expandable and house ruled and the whole game has received a lot of online support despite its age. This site has an revised version of the game that has been authorized by Hasbro (who owns the Milton Bradley brand.) But it's in French! I don't see any sign of the game being translated to English although I am seriously considering attempting to facilitate the move myself. Any French language speakers interested in helping me out?
My idea for correcting the Wizard advancement problem is simply to remove the "not usable by Wizard" limitation. Of course I needed to have some means to keep the archtypes in place. I decided to make item use based on BODY and MIND. It didn't take me long to realize what I was working on was an item based advancement system that mirrored the original Diablo computer game by Blizzard almost exactly.
And that was that! A HeroQuest Adventure Pack based on the Diablo computer game seemed like the only thing to do! My roomies and I are really looking forward to playing this!
If you want to have a look at what I've done so far, download the PDF of the DiabloQuest pack for HeroQuest and have a look!