Your Plot Outline.
A Living World.
Feed A Co a simple plot outline and watch it generate rich lore, detailed NPC backstories, and immersive maps — everything you need to run an unforgettable campaign.
Three Steps to a Living World
Write Your Outline
Describe your campaign premise in plain language. A paragraph is all it takes — the darker the plot, the richer the world.
AI Generates Your World
Our engine weaves your outline into interconnected lore, factions, histories, and geography — consistent and deeply layered.
Get Lore, NPCs & Maps
Receive ready-to-use world documents: detailed NPC sheets, regional lore entries, and annotated maps for your sessions.
From One Paragraph, All of This
Here's what A Co generates from a single plot outline about a cursed kingdom and a missing heir.
The Shattered Crown of Valdris
For three centuries, the Crown of Valdris held the kingdom's leylines in balance. When Queen Seraphine vanished on the night of the Blood Eclipse, the crown shattered into seven shards — each embedding itself in a different region, warping the land around it.
The Thornwall Forest grew overnight where the Eastern Shard fell, its trees crystallized in perpetual twilight. The people of Greymoor speak of lights beneath the lake where another shard rests, drawing the dead to its shore at low tide.
Kaelen Duskward
Half-Elf Ranger · Neutral Good · CR 8
Once a captain in the Queen's Vanguard, Kaelen deserted when ordered to raze a village harboring shard-touched refugees. Now she guides travelers through the Thornwall, haunted by the faces of those she couldn't save.
The Thornwall Forest
Every Storyteller's Secret Weapon
Dungeon Masters
Stop spending hours on prep. Generate a full world in minutes and focus on what matters — running an incredible session.
- ◈Session-ready NPC sheets with motivations
- ◈Consistent lore that players can explore
- ◈Maps with built-in plot hooks
TTRPG Players
Build deep character backstories that weave naturally into any setting. Your DM will think you spent weeks on it.
- ◈Rich character origins tied to world events
- ◈Faction relationships and allegiances
- ◈Personal quest hooks and secrets
World Builders
Kickstart your worldbuilding with AI-generated foundations. Iterate, refine, and make it your own — 10x faster than starting from scratch.
- ◈Interconnected histories and cultures
- ◈Political systems and power dynamics
- ◈Exportable lore documents
Your World Awaits
Join the waitlist to be among the first to forge entire worlds from a single plot outline. Limited early access spots available.
No spam, ever. We'll only email you when it's time to build worlds.