I was mulling over how you’d do a Lovecraftian type hack of Dungeon World. You know, “Dagon World” or some such. More powerful (and agency-empowered) Investigators then are normally seen in a Lovecraftian RPG, set in high fantasy… basically Dungeon World with sanity mechanics.
But why mess with a system that already works?
Here’s a CC about gazing into the abyss. It’s optional, but provides powerful tools if embraced by the player. Individual horrors should have individual mechanics, and that’s already covered under the core Dungeon World book. You could run a campaign with the Thing In The Well in Dungeon World as it is, for example, you’d just have to write up some custom moves beforehand.
/Ramble. Here’s the link.