01
Prepping
Pick your adventure and make it yours.
You play.
OnéoN handles the rest.
Play your tabletop RPG campaign in a world you share with other parties. Every choice, every victory and every consequence can change OnéoN for the other tables too. Thousands of campaigns, one world, a story all of us write.
Write your party's story.
18 adventures ready to play378 illustrated scenes152 ready-made encounters60 species, each with its card469 illustrated items1,392 compendium entries118 canon NPCs199 secrets to uncover
For Game Masters
At last, full support for everything a Game Master does.
02
Taking notes
At the end of every session you and your players have the journal updated with quests, items and encounters.
03
Recapping
Every session goes into the shared world automatically.
04
Storytelling
The reason nothing will ever replace you. OnéoN is your support, you are the storyteller.
A session with OnéoN
Press Start and create your campaign.
01 · Manage
Your table on one screen
Your interactive rulebook. Prepare every session, run the party, follow our adventures or rewrite them the way you like.
02 · Run
Start the session
Kick the session off. The Lectern walks you through every step like a rulebook, records the evening, and OnéoN takes care of everything else.
03 · Choose
The plot is your call
OnéoN lets you pick or create maps, encounters, NPCs and every turn your plot can take with the party. You decide how much to follow the thread and how much to improvise.
The Game Master leads, OnéoN supports.
Your campaign is not isolated any more. Play alongside Game Masters from all over the world on one shared map. Every party, every campaign, every session will shape all the others.
Behind the screen
An assistant that knows your table.
Who that character is, what your players know, how that rule works. Two-line answers, mid-session, without losing your thread.
Master Assistant
Ask the Master Assistant
The encounter
Fights that are easy, clear and fast.
You play them at the table, and OnéoN supports you with all the rest.
Interactive terrain
Water, grease, fire, ice and darkness really do change the battlemap, the movement and the roll.
Fog of war
It opens as you walk, and every player sees only what their character sees.
Balanced
Set the encounter up and pick the challenge level for your party.
OnéoN does the math
Spells, actions, movement, attack rolls, reactions and everything you used to work out by hand, now on one screen.
At the table
Your screen, their TV.
From the Lectern you share the scene art with the whole party or with a single player. You tell the story from your own private screen.
On a screen
From the Lectern the scene lands on the living room TV, on a tablet or on one player's phone. The party watches, you tell the story.
On paper
Print the sheets and play with a pencil and dice. OnéoN keeps listening, follows you, supports you and writes what your party does into the shared world.
For players
Your character comes to life.
Sixty species, each with its own illustrated card. Thirteen classes, backgrounds with their own scene, a portrait that respects who you are.
Character creation
Species, class, background, ability scores, gear. Ten steps, and the character is at the table.
For players
Build your sheet
You just play. It comes with you everywhere, phone included.
Every spell one tap away
On your own device, the full list of spells and features for every class and every level.
Open the map
The world opens where you travel. Every player sees what the party really saw.
Read the journal
Quests, objectives and memories of every session, written while you play and confirmed by the Game Master.
Keep your notes
What you want the party to know, or what you keep to yourself.
The sheet does the math
If you want it to. Slots, rests, hit dice, attunement.
The journal writes itself
Quests, memories of every session, notes stamped with the table's minute.
Zero spoilers
A creature nobody named stays nameless until someone says it at the table.
The shared world
One world, many tables together.
The stories, the adventures and the encounters of every campaign weave into the same world. Every session shapes the shared world of OnéoN, and every other party sees the consequences of what you did, the way an online world works. The evening stays yours.
The Temple Companyplaying right now from SwitzerlandThe Wanderers of Zaitorplaying right now from ItalyThe Archers of Vhalorplaying right now from PortugalThe Ember Circleplaying right now from CanadaA world to build
Bring down the bosses, craft unique items, raise settlements, survive out there. Write your own story.
Traces remain
What your party changes is what the tables coming after will find.
Parties meet
Other groups travel the same places, and sooner or later you cross paths.
Goods change hands
Items traded at the market, each with its price and its history.
Guilds form
Tables that ally, factions that grow, deeds that count for everyone.
The switch
Everything you keep in six different places today.
Today
Six tools that never talk to each other
With OnéoN
One, and it remembers everything
Session notes
TodayA notebook and your memory
With OnéoNRecording, transcript, proposals ready
Recap for the party
TodayA WhatsApp message
With OnéoNA journal with quests and memories
Prepping an encounter
TodayAn hour between rulebook and grid
With OnéoNPrep: battlemap, creatures, balance
Improvised NPCs
TodayA name, then nothing
With OnéoNBorn at the table, with a sheet and a memory
Player sheets
TodayPDFs and a pencil
With OnéoNSheets that do the math for you
The world
TodayA doc that grows only for you
With OnéoNA world shared by every table
FAQ
Before you ask.
Does it replace playing at the table?
No. You play as always, with dice, friends and snacks. OnéoN lives around the table: it preps, listens, remembers.
Where do you play?
Wherever you want. At your table at home with OnéoN on a phone, a tablet or the living room TV, or online from any device. The platform carries the session, the stories stay yours.
Which ruleset?
D&D fifth edition, 2014 rules. Compendium, sheet and encounters all speak that language.
Can I run my own campaign?
Yes. Play the adventures you find inside OnéoN or bring your own story: whatever is born at the table becomes part of the world.
How far along are you?
OnéoN is in alpha test with real tables playing every week. What you see above are real screens, captured from the platform.
When does it open, and what does it cost?
Early access opens in autumn 2026. We are still shaping the price, and founders lock it before anyone else.
Founders
The first tables build OnéoN with us.
Leave your email and hold your seat. The doors open in the autumn, and whoever comes in first gets the best terms.
Write the legend of OnéoN with your party.
- Early access, limited seats, before the public opening
- Founder privileges
- Your seat in the founders' circle
- Help write the origin of OnéoN's story