🌊 The Ripple Effect
Build your world inside-out. Start where the players are standing — and ripple outward only as far as tension demands.
The Trap Every GM Falls Into
The most common worldbuilding mistake isn't a lack of creativity — it's starting in the wrong place. You map continents, design royal lineages, draft pantheons, write centuries of history. Then session one happens and the players spend three hours in a tavern talking to a barkeep with a bad leg. None of your prep was needed.
The Ripple Effect inverts the process. Start at the point of immediate player contact. Build only what creates tension they will actually encounter. Ripple outward only when the story pulls you there.
"You don't need to know the political history of a continent. You need to know why the blacksmith is nervous."
Three Tiers, Built Inside-Out
The Epicenter — Micro
Build FirstWhat players can see, touch, smell, and fight within their first session. The mine, the tavern, the locked gate. Make this vivid and specific.
The Horizon — Meso
Build When ReadyThe surrounding pressures pushing against your Epicenter. Not full nations — just forces that want something from this place. Each with a conflicting goal.
The Mythos — Macro
Build Only What DistortsThe grand truths and lies of your world — but only the ones that actively warp the layers above them. Lore that never touches the Epicenter can wait.
Tier I — The Epicenter
MicroThe Epicenter is everything the players can interact with right now. When you build it, ignore what's beyond the hills. Three questions are all you need:
The Anchor
The one feature that keeps this community alive and in place. Remove it and the place ceases to exist.
The Friction
The immediate, daily problem ordinary people here actually talk about. Not a war three kingdoms away — the thing keeping them up tonight.
Three Landmarks
The three places players will naturally drift toward. Each should offer a different kind of interaction: information, commerce, danger, rest.
Example — Stonehaven
AnchorThe iron mine — the only reason the town exists.| FrictionThree miners went into the lower tunnels last week and didn't come back.| LandmarksThe Rust & Rafter tavern, the blacksmith's forge, the mine entrance itself.
Tier II — The Horizon
MesoThe Horizon is the ring of forces surrounding your Epicenter — not full nations with detailed histories, but pressures. Each one wants something from your Epicenter. More importantly, each one's goal should conflict with at least one other.
The Golden Rule of the Horizon
Every pressure must want something the others would oppose. This guarantees that no matter which direction players walk, they walk into a choice with consequences. You're not designing factions — you're designing dilemmas.
Example — Stonehaven's Horizon
- EconomicA distant city wants the iron and is threatening to send soldiers to "secure" the mine.
- EnvironmentalA cursed wilderness at the mountain's base is slowly expanding, spoiling crops.
- SocialA clan of mountain nomads claims the mine sits on ancestral land — and they're right.
Tier III — The Mythos
MacroThis is where your history, lore, and grand cosmic truths live — but with one strict rule: only define it if it actively distorts what's above it. A 10,000-year timeline that never touches the Epicenter isn't worldbuilding — it's procrastination. Two questions are all you need here:
The Core Truth
One systemic rule that governs how this world works differently from ours. It should be felt at the street level — not just in the history books.
The Grand Lie
The one thing everyone believes that is either false or far more complicated than they know. This is the engine of your long campaign.
Example — Stonehaven's Mythos
Core TruthMagic in this world is geological — drawn from veins of arcane ore deep underground. Grand LieThe townspeople believe the mountain protects the valley from an ancient evil. The mining is slowly wearing away the seal.
Build Your World
Work through the three tiers. When you're ready, click Generate Preview for a formatted summary you can copy into your notes.
The Epicenter
The Horizon
Three forces that want something from your Epicenter. Make their goals conflict with each other.
The Mythos
Your World
Building the world is only half the work. The characters who inhabit it are built the same way — inside-out, from a single defining moment. The Fault Line applies this framework to character backstory. Already know who they are? The Emotional Compass names the emotion driving them.
Part of Story Craft — concepts for telling memorable stories in any system.