> if a third of the top board games
I don't think it makes sense to consider Gloomhaven and Gloomhaven: Jaws of the Lion independently. There are other issues with this count -- for example, Lost Ruins of Arnak doesn't appear to, technically, exist yet -- but that would be the main one.
If, instead of the "the hotness" sidebar, I look at the top 20 games by rating, then those with more than zero potential occult flavor are:
1. Gloomhaven
13. Spirit Island
19. Arkham Horror: The Card Game
(with potential honorable mentions going to Star Wars: Rebellion and War of the Ring: Second Edition, depending on your opinion of Star Wars and Lord of the Rings.) This is 15%, not 33%.
You have to know what it is you're trying to count. A Feast for Odin (#23) might be objectionable on the grounds that you are thematically honoring a pagan god. But it involves no supernatural phenomena whatsoever. Mage Knight (#24) is a war game in which you use magic.
I would mentally classify Mage Knight in the same genre as superheroes rather than occultism, but somebody else might differ. But my larger point is, it's a mistake to look at those two games, acknowledge that they both meet (very different) definitions of occultism, and then conclude that occultism is extremely prevalent. First define what occultism is, and then you'll notice that the number of games actually meeting that definition is much smaller than the number of games potentially meeting any definition.
