Parmandur
Book-Friend, he/him
Excellent post, Jester. I'm going to go back and give it XP in a moment.
Clue did get a major overhaul in 2008, which seems to have been poorly received. In addition, the Limited Gift Edition does add another weapon. The Harry Potter Edition "is a major departure from traditional gameplay and constitutes a spin-off in its own right" and includes a variable game board. There's also a Dungeons & Dragons Edition from 2001. There's a whole host of branded editions. It's a bit of a fuzz whether those are accessories or variants or spinoffs or something else, but D&D could easily be reissued in multiple brands that reskin the same rules over and over.
I think you're right about Hungry Hungry Hippos, though.
That kinda plays into the point, though: that's the sort of release expectation Mearls has cited for D&D moving forwards.