I love this game, and I made a ton of custom modules and expansions for it, all included in my Custom Heroquest Trove!
Custom Rules and Mechanics
Revised Armory, US and UK items, plus New Stuff
Revised Spell Cards from Base Game & All Expansions
New Hero Classes: Clerics, Witches, Giants, and More
Epic Homebrew Campaign: The Arden Daredevils