The AI tells the story. WyrdTale makes the world real.
This isn't a ChatGPT wrapper or a prompt with a character sheet attached. WyrdTale is a persistent rules engine the AI operates: it resolves actions, executes skills, applies status effects, runs combat, advances time and weather, and tracks every person, place, faction, item, secret, and relationship across a campaign.
You speak naturally. The AI interprets intent and operates WyrdTale's tools; the engine validates the action, rolls the dice, changes durable state, and returns facts the AI must narrate.
A Linecutter technique from the included Japanese street-punk world. It deals no damage. Instead, a failed Dexterity save applies Thrown Off-Line for a few rounds.
That effect is executable, not flavor text: movement drops 25% and accuracy drops by 2. The same system can grant armor, alter ability scores, give advantage or disadvantage, deal damage over time, scale potency, expire on a clock, and enforce one-effect-per-target rules.
Real entities from the current Kyōsei starter world, shortened for readability. The world file also defines 19 skills, 9 status effects, 9 classes, 41 developed characters, 36 locations, vehicles, weather rotations, events, relationships, secrets, and live tension clocks.
No forms to fill out, no wikis to pre-write. You talk about your world and the engine derives classes, skills, factions, and geography—all consistent with your vision.
These three ready-to-play worlds began as conversations. Each was fully built in under two hours—classes, characters, factions, places, items, vehicles, secrets, and an opening scene—without a form, map editor, spreadsheet, or manual authoring pass.
Powers are licensed labor and heroes are corporate employees. Its classes describe how power manifests: Bruiser, Blaster, Speedster, Shifter, Controller, Psychic, Sensor, Operative, and Civilian. Four resource pools drive different power families, while The Cache turns dimensional storage and time-stasis into a signature mechanic.
Humanity are the reckless newcomers among ancient civilizations. Its classes describe frontier work: Combatant, Pilot, Technician, Scholar, Operative, Envoy, Medic, Civilian, and Anomaly—the gate-touched, who channel poorly understood Resonance.
Vehicle · Borrowed Time: a Ruger-Maddox Model 7 rebuilt a dozen times, with no two parts from one civilization. It is a home, inheritance, repair problem, and future means of crossing the setting—tracked by the same engine as its people.
The updated starter world includes 36 locations, 20 characters, 23 skills, 14 items, 9 weather patterns, 7 vehicles, 5 factions, 5 world rules, 3 live tensions, and 3 historical events.
In a privatized Japanese megacity, crews reclaim public space through wheels, murals, music, races, and found family. Its classes describe how people move and make change: Linecutter, Heavy, Scraptech, Writer, Pulse, Citizen, Patrol Contractor, Suppression Officer, and Corporate Operator.
No magic: art changes minds, never physics. Adaptive wheels, improvised technology, crowd-reading, and corporate force give this world an entirely different mechanical vocabulary.
One engine produced a conspiracy about controlled superhumans, a starship frontier shaped by alien ruins, and a kinetic youth-culture drama where nobody has supernatural powers. The rules followed each idea instead of forcing all three ideas to behave like medieval fantasy.
In a chatbot, the blacksmith exists only as long as the conversation. In WyrdTale, he has psychology, secrets, a home he goes back to at night, and a relationship with you that evolves over time.
You show the binding mark to the blacksmith. He flinches—hard—and turns back to his anvil. Won't explain. Changes the subject twice. Offers you a discount on a sword you didn't ask about.
You return to Garrett's forge. He sees you come in and—for the first time—closes the shop door. He remembers you. Remembers the mark. Something has shifted: he reaches under the anvil and slides a tarnished key across the workbench.
Garrett is an illustration. Here's a real one—from Dark Superhero, one of the ready-made worlds you can open in a minute and reshape, or set aside to build your own. In it you play Luke: nineteen, raised inside the shadow apparatus that quietly runs the city's licensed heroes.
A former resident of the Roost—the hidden facility Luke grew up in—now a field operative for the same apparatus, Dorian offers to mentor him. He's warm, polished, generous with advice. He's on Luke's side.
The web around him is real, too: the charity that placed Luke spent years grinding down the aunt who tried to take him in—paperwork, delays, “respectability theater”—to keep her an unresolved loose end instead of a scandal. And none of it is reserved for a showcase world: the same density of characters, relationships, and factions grows around whatever world you build.
Everything above is a claim. Here is evidence: excerpts quoted verbatim from the log of a real playthrough of the Space Cowboy starter world (July 2026) — the player's words, the engine's raw output, and the narration the GM made of them. Shortened, never rewritten.
Dawn raid. Pirates on the family farm. Jett Burrow—eighteen years old, level 1—has one at gunpoint and tries to talk the whole crew off the land.
Jett Burrow rolled CHA check: 10 vs DC 13 - FAILURE [narrow]
The word cowboy does something. … He wants out. You've nearly got him.
Nearly.
Because the other one hasn't been standing still. The whole time you were talking — the steel, the ultimatum, all of it — the man against the wall was moving, quiet as frost settling … And now, from an angle you never covered, low and off to your left, you catch it: the stubby snout of a barrel easing through the gap. Settling. On you.
“You've got one on him. I've got one on you. You can't shoot both. Do the math a smart kid does.”
“I lunge to the right, covering the two steps in one stride, then begin firing off rounds in the direction of the man in front of me, trying to hit him, while running for cover behind the ship.”
INITIATIVE ORDER 1. Denn: 18 (d20=16, DEX +2) 2. Jett Burrow: 16 (d20=13, DEX +3) 3. Roby: 11 (d20=9, DEX +2) Denn attacked Jett Burrow with DEX (CRITICAL MISS! 3 vs AC 16) Jett Burrow used Ben's Sidearm (using DEX) • Roby was hit (22 vs AC 12) [decisive] took 9 energy damage (1/10 HP) resource changes: Jett Burrow Resonance 2 → 3 ── Combat · Round 1 · The Barn · Night ── Allies: Jett Burrow — Healthy · Resonance 3/10 ← acting Enemies: Denn — Healthy Roby — Critical
Three consecutive engine returns from the same round, condensed.
You feel it more than see it: the flat crack, a spit of splinters where the shot bites the doorframe a full body-width from where you'd been … Your read was true. He shot the space you'd already left.
It's nothing like the footage. There's no music. There's just the buck of it in your two hands — steady, steady, the way he drilled you, hands that don't inherit the body's panic — and the scarred man in the doorway going from a shape with his palms up to a shape folding around itself.
A different conversation, days later. Before narrating a word, the GM reloads the save and re-grounds on the record. This is some of what it finds.
── Scene · Burrow Farmhouse · Dawn ── Present: Ben Hadley, Cole Burrow, June Burrow, Mara Burrow, Wren Burrow PC: Healthy · Resonance 0/10 · Tension: The Hierarchy of Ages
The world in these excerpts is the same Space Cowboy starter anyone can open—say “Play the Space Cowboy demo” and you're standing where Jett stood, or reshape it until it's yours.
Your system doesn't just start bespoke—it keeps growing. Use “Channel Elements” to create fire walls three times and WyrdTale offers to crystallize “Wall of Flame”—a new skill shaped by your playstyle.
Every relationship tracks dynamics, catalysts, and secrets. Betray the merchant guild and the system remembers why an assassin shows up six sessions later.
Mechanical time tracks dawn and dusk, recharges abilities, and sends NPCs home at night. Visit the tavern keeper at midnight—she's not there.
Real dice rolls, real resource depletion, enemies that fight to win. Defeat and death are on the table.
WyrdTale plays like having an AI dungeon master—you say what you do, it runs the world, the dice, and every character. But it isn't D&D 5e: instead of one fixed ruleset bolted onto every setting, the engine invents a system from your world. Solo or GM-less, anytime, and the world is a file you own—no credits, no metered tiers.
Describe a world and the engine derives its system with you—classes, factions, geography, vehicles, and a playable opening. Under two hours from a blank page to a place only you could have made, entirely through conversation.
Start a new gameIn a hurry? Open Dark Superhero, Space Cowboy, or Kyosei and you're in within a couple of minutes—then make it yours: keep the hero, take over any character, or reshape it. Three doors into the same adaptable engine.
Play the Dark Superhero demoPlay the Space Cowboy demoPlay Kyosei: Street RebellionConnect WyrdTale to Claude or ChatGPT:
The ChatGPT client ID is a public PKCE identifier, not a password. Do not use Dynamic Client Registration for ChatGPT yet—its current DCR flow omits a required scope.
Add this to your Claude Desktop config file (requires Node.js):
{
"mcpServers": {
"wyrdtale": {
"command": "npx",
"args": ["mcp-remote", "https://wyrdtale.com/mcp"]
}
}
}
Any client supporting remote MCP servers can connect to https://wyrdtale.com/mcp
Recommended models: Claude Opus 4.7 or Opus 4.8 for Anthropic; GPT-5.6 for ChatGPT. In current testing, GPT-5.6 works best with WyrdTale. Any capable MCP agent can connect.
WyrdTale's Game Master runs from an operating guide. Pin it in a Claude Project and Claude keeps it loaded across long sessions—even after hours of play fill the context window. This is the recommended way to play.
At the start of play the GM looks for the line WYRDTALE GUIDE v22 in your Project. If it ever reports the guide is missing or out of date, download it again here and replace the file in your Project knowledge.