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The World Below hero art
Onyx Path Publishing

The World Below

"The World Below provides, but only to the worthy."

Diced10 pool
Players3–5
Prep~60 min
Foundry VTTNone
Complexity
What is this system

The World Below is Onyx Path's fantasy survival game, the first built on Storypath Ultra and the first book of the Earthbane Cycle. The world above is ruined and the survivors have fled underground, where they must dig, map, build and defend. It can run as a modest cave crawl or an expedition across the whole World Below. Heroes who die or retire are replaced by their descendants, so a campaign becomes a family history.

Setting

Pitch-dark caverns, the predators in them, and people dressed in insect carapace and silk. Guilds trade in knowledge of safe spaces and food. At the lowest mapped point lies the Well, a source of Kaos that gives light, clean water and food, guarded by the Well Liches. Whoever breaks through to that power must decide whether to keep it or share it.

What it looks like at the table
Your party is mapping a new tunnel when the lamps start to fail: a Kaos storm is coming. You roll a pool of d10s, and every 8 or higher is a success. There are enough to get everyone out, but part of the map is lost. Back home you play the Kalm phase: you take Experience, strengthen the settlement and raise your family. If a hero fails to return one day, a descendant goes down next.
Playstyle
Exploration Survival Combat Fantasy Post-Apoc
Key mechanics

Storypath Ultra

Pools of d10s from an Attribute and a Skill, with every 8 or higher a success. Complications and Enhancements, plus dedicated rules for action, investigation and influence.

Dig and map

Play cycles between the delve and the return. In the Kalm phase heroes take Experience and grow their habitats and families, and gear is made from what the deep provides.

Kaos and sorcery

Kaos is the lifeblood of the World Below. Heroes draw on it through Theses, Syntheses and Sorceries, and unpredictable Kaotic Retaliations are always a risk.

Dawns, Dialectics, Callings

A character is built from three Paths that grant Skills and talents. Some options come from the traditional fantasy mold, others exist only here. When a hero dies, a descendant carries on.

Art & materials
Free resources

Written and curated by Kejid — TTRPG player & GM

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