Now available: The World Below

You must dig. You must explore. You must map. You must build. You must defend. The World Below provides, but only to the worthy. The unworthy fall, consumed by bugs, lava, acidic fog, the vagaries of Kaos, and the World Below’s convulsing tunnels.

After some wait, the World Below is finally out into the wild! it was a joy writinng the Synthesis and Thesis and some of the Sorceries in this game. I hope you enjoy delving into the depths and secrets that lurk within. 

https://www.drivethrurpg.com/en/product/500655/the-world-below-core-rulebook?affiliate_id=1686942