AI Dungeon Multiplayer (2026): How It Works, What It Costs, and Why the Table Forgets Faster

AI Dungeon multiplayer is one shared adventure that several players write into at once, with one AI answering all of them. A host creates the game, shares an eight-digit code, and everyone who joins adds their own Do, Say and Story actions to the same story. There is no turn order, no player cap, and no separate character sheets. It is AI Dungeon’s single-player game with more than one person at the keyboard.

This guide covers setting a game up, what it costs and who pays, and the one thing that really changes when more people play. Everyone at the table shares a single memory. Four players fill the context window four times as fast as one, and the story forgets its early events sooner. Most of the problems people have with AI Dungeon multiplayer come from that, and most of the fixes are about working around it.

Everything here is checked against Latitude’s own documentation as of 25 September 2026. If a game has already gone wrong, the short troubleshooting version is in AI Dungeon not working. If you are still choosing a platform for your group, our comparison of every multiplayer AI DM is the better starting point.

AI Dungeon is a product of Latitude Inc. Arcanum is independent and unaffiliated; the name is used here only to identify the product.

How to Start a Multiplayer Game

The host is whoever creates the game, and the choice matters more than it looks (the section on hosting below explains why). The steps, from Latitude’s documentation:

Open the Play menu and select Multiplayer.
Select Create Game. This opens a setup that works like Quick Start, with the usual choices of genre and settings.
Once you pick an option, the game screen loads.
Open the game menu — the flame icon in the top-left corner — and select Invite Players.
That generates the eight-digit join code. Share it with the people you want at the table.

When someone joins, their avatar and name appear in the game menu under yours. Their avatar also appears above the command buttons on the game screen, and when a player is typing a turn, three dots show on their picture.

Latitude adds one warning here, and it is worth taking seriously: anyone who has the code can join. A code in a public Discord channel is an open door. The host can remove people afterwards (see below), but it is easier not to post the code anywhere public in the first place.

How to Join Someone Else’s Game

Get the eight-digit code from the host.
Open the Play menu, select Multiplayer, and type or paste the code.
Select Join Game. You go straight into the game screen.

After that, the adventure appears on your home screen like any other, except that its card says Multi instead of Private or Public. You can close the app and come back to it later.

Two buttons look like they do the same thing, and they do not:

Leave (under the three dots ··· next to your own name in the game menu) removes you from the game. To get back in, you need the code again.
Exit Game (at the bottom of the game menu) only takes you back to the home screen. You are still in the game, and Continue on the adventure card puts you straight back.

Most “I lost the multiplayer adventure” reports are someone who pressed Leave when they meant Exit Game. The same three-dot menu also has Edit Character Name, which matters once Third Person is on.

Is AI Dungeon Multiplayer Free?

Latitude’s multiplayer documentation lists no membership requirement for hosting or joining a game. What a membership changes is what the table plays on, and only one membership counts: the host’s.

Latitude’s documentation is direct about it: “The host’s AI model settings will apply to all players who join a Multiplayer game. If the host has a premium membership, all players can benefit from the premium settings selected by the host.” Its FAQ repeats it: “only the host needs to have a premium subscription for all players to enjoy membership benefits during a Multiplayer game.”

In practice:

A free host means a free table. The game uses the host’s free models and free context, even if every other player at the table pays for Ultimate.
A premium host lifts everyone. A Journey host puts the whole table on Journey models and context. The guests do not need a membership.
So the subscriber should host. If one person in your group pays, that person creates the game. Latitude’s own advice says the same: “if you want everyone to play using a Premium AI model, the player with a subscription should set up the Adventure.”

The cost arithmetic makes this the cheapest group setup AI Dungeon offers. Latitude’s public tiers run from Journey at $14.99 a month to Ultimate at $99.99. One Journey membership seats a whole table on Journey settings, so a group of four sharing it pays under four dollars each. Journey and Legend also come with a one-week trial. Latitude warns that premium benefits end the moment a trial is cancelled, not at the end of the week. The full tier breakdown, and which models each tier opens, is in our AI Dungeon model guide.

The Table Shares One Memory

This is the part no setup guide mentions, and it explains most of what goes wrong in a group game.

AI Dungeon does not keep a separate memory for each player. There is one adventure, one context window, and every player’s actions go into it. Latitude publishes the rules for what goes into that window, in unusual detail:

Required elements go in first: AI Instructions, Plot Essentials, Story Summary, Author’s Note, Front Memory and the last action. They can take up to 70% of the window.
Dynamic elements share what is left: about 50% to story history, 25% to the Memory Bank and 25% to Story Cards.

Apply that to the context your table actually gets, and assume a well-configured adventure whose Plot tab reaches the 70% ceiling. The history the whole table shares looks like this:

Host’s model context	Story history the table shares	Roughly, in words	Story Card trigger window
2k (some free models)	~300 tokens	~225 words	4 actions
4k (the best free models)	~600 tokens	~450 words	4 actions
8k (most models on Journey)	~1,200 tokens	~900 words	6 actions
16k (most models on Legend)	~2,400 tokens	~1,800 words	12 actions
32k (Mythic and Ultimate)	~4,800 tokens	~3,600 words	24 actions

Our arithmetic on Latitude’s published allocation rules, using the same assumptions as our Story Cards guide. A near-empty Plot tab leaves more room for history. A carefully filled one leaves exactly this. Words are estimated at about 0.75 per token.

For one player, 450 words of history is a few exchanges. For four players it is the same 450 words, filled four times as fast. The AI does not remember less in multiplayer. It remembers the same amount of text, and with four people writing, that text covers a quarter as much of the story.

The last column is the harsher one. Story Cards (AI Dungeon’s world notes, which enter the prompt when a trigger word appears) are only checked against recent actions. Latitude’s rule is “a minimum of 4 actions,” and the window only widens once more than 500 tokens are free for cards. On the small contexts of the free tier, you stay at that floor.

At a four-player table, four actions is at most one round. If one player names the Iron Keep and the other three players act next, the Keep’s card can already be out of range. The card is fine. It fell out of range because it was your turn three turns ago. Solo players and groups describe this differently, but it is the same rule. The group simply reaches it every round.

Three things follow, and they are the practical core of this guide:

Anything the whole table relies on belongs in Plot Essentials, not Story Cards. Plot Essentials is a Required element, sent on every turn. Story Cards are for material that is only sometimes relevant.
Each player’s character should be named in the actions often. A character card whose trigger is the character’s name fires every time that player acts. That is a reason to turn Third Person on (next section).
Context matters more for a group than for one player. A free 4k model can work well for one person. With four people on the same window, the upgrade that matters most is the host’s context, and the next tier up doubles it.

If you want to see what your own adventure is spending, the Context Viewer shows how many tokens each element takes. It turns all of the above from estimates into numbers.

Setting Up the Adventure for a Table

A single-player adventure assumes one protagonist called “You”. A table needs a few changes before the first action.

Turn On Third Person

Third Person is a Plot Component built for multiplayer, and it is the most important setting in a group game. Latitude’s settings documentation: “When this component is enabled, everyone in the Adventure will be prompted to enter a name for their character, and that name will be used for their Do and Say actions during gameplay.”

Without it, four players all write as You. “You draw your sword” from one player and “You run for the door” from another reach the AI as the same person doing both. With Third Person on, those become “Mara draws her sword” and “Tobin runs for the door”, and the AI can tell whose action is whose. It also helps with the memory problem above: every action now carries a name, so character cards triggered by those names fire every time.

Add it from the in-game settings, in the Plot tab. Players can change their name later with Edit Character Name in the game menu.

Write the Party Into Plot Essentials

Plot Essentials is sent on every turn, so it is the one place a party roster is always seen. Keep it short, because it spends the same budget as everything else:

The party: Mara (human knight, reckless, owes the Guild money),
Tobin (halfling thief, cautious, secretly working for the Duke),
Ilse (elf healer, pacifist, searching for her brother).
Each player controls one character. Never act, speak or decide for a player character.

The last line matters. With several players, an AI that decides what Mara does leaves Mara’s player with nothing to do. Latitude recommends AI Instructions for point of view and behaviour, and a short rule like this one works in either place.

One Story Card Per Player Character

Give each player character a card, and make the character’s name the trigger. With Third Person on, the name appears in every action that player takes, so the card fires whenever they act. Keep the entry to what the AI needs about them: appearance, one or two traits, what they want. The AI never sees a card’s Name field, so name the character inside the Entry text too. Otherwise the AI gets a description with no name attached. Our Story Cards guide covers the format and the trigger rules in full.

Keep the Author’s Note for Tone

The Author’s Note goes in near the end of every prompt, and it is the best place for what the whole table agreed on: genre, tone, how dark the game gets. If the table agrees “gritty, low magic, no comic relief”, write that here once so nobody has to keep correcting it in their actions.

Running the Table: Turns, Pacing, Collisions

Latitude’s documentation describes no turn order. Anyone can act at any time, and the AI answers whatever has come in. Latitude is open about the result: “Adventures can get a little crazy with overlapping actions when there are tons of people playing together! But that can also be part of the fun.”

Some groups like the chaos. Groups that want a readable story usually agree a few simple rules outside the game, in voice chat or a group message:

Go round in a fixed order, one action each. This also makes the memory arithmetic predictable: a round costs the same every time.
Keep actions short. Every word a player writes spends the history the whole table shares. A 200-word action from one player uses up the memory for everyone.
Let one person use Story mode for corrections. Story mode writes text straight into the adventure. If one agreed person (usually the host) fixes contradictions with it, you avoid four people correcting the same mistake four different ways.
Say when you are away. The typing indicator shows who is writing but not who has gone to make tea. A game waiting on someone who has left stalls quietly.

Because the adventure stays on everyone’s home screen, a game does not have to happen in one sitting. Players can use Exit Game and come back tomorrow. So the same feature works for a live session or for a slower game over several days, and the table’s own rules decide which one it is.

Who Should Host, and What the Host Controls

The host has more control than the other players, and it is worth choosing the host on purpose.

The host’s settings are the table’s settings. That covers the model, its context and the rest of the host’s AI settings. The host’s membership decides the models, and the host’s context decides how much the table remembers (see the table above).

The host controls the content settings too. Because the game uses the host’s AI settings, it also uses the host’s safety setting. Latitude’s documentation states that everyone playing a mature game must be 18 or older, and that the host must set their own safety setting to Mature for the table’s game to use it.

Only the host can remove people. The three dots ··· next to a player’s name give the host two options:

Kick removes a player for now. They can rejoin with the code.
Block removes them for good. They cannot rejoin.

If a code has leaked, blocking an unwanted player is the only real fix. The code keeps working for anyone else who has it.

So the best host is the player with the membership, who is also the one the group trusts with the settings and the Block button. That is usually the person who organised the game anyway.

What AI Dungeon Multiplayer Does Not Do

Here is what the feature leaves out, checked against Latitude’s documentation. This describes what exists, not how good it is.

No turn order. The game does not organise turns. The table has to.
No player cap. The “(1/4)” next to Invite Players is, in Latitude’s words, “simply a suggestion.”
No separate memory per player. One adventure, one context window, shared by everyone (the arithmetic above).
No character sheets, dice or rules. AI Dungeon has no built-in rules in single-player either, so multiplayer has none. Players who want rules can add them with scripts — the community script Hashtag DnD adds hit points, dice, turn-based combat and a party with individual stats — but someone has to install it in the scenario first.
No per-player model choice. Everyone plays on the host’s model.

None of this is a fault. AI Dungeon is a freeform story engine, and multiplayer is that engine with more people writing. Groups that want a structured tabletop — shared maps, character sheets, dice, a game master that runs turns — are looking for a different kind of product. Latitude also makes one: Voyage runs private co-op for a host plus up to four invited players, and free public servers with parties of up to eight. Our multiplayer comparison sets out every option by player cap, format and price.

Where to Find People to Play With

If your own friends are not interested, Latitude points to one place: the #multiplayer channel on the official AI Dungeon Discord, where players look for groups. The same warning applies there: “anyone who sees your short code will be able join the Adventure it came from.” In a public channel, send the code to the people who answered in a private message rather than posting it for everyone. And remember that you can Block anyone who turns out not to fit the table.

When Multiplayer Is Not Working

The common multiplayer problems are all covered in our main AI Dungeon not working page. In short:

Everyone is on the wrong model → the host’s settings apply to all. Change them on the host’s side, or have the subscriber host.
Someone “lost” the game → they pressed Leave rather than Exit Game, and need the code again.
A removed player cannot get back in → the host blocked them rather than kicking them.
The AI mixes up who did what → turn on Third Person, and give each character a card.
The AI forgets what happened a round ago → the shared-memory arithmetic above. Move key facts into Plot Essentials, shorten actions, or have the host raise the context.

If the whole service is down rather than just your game, the same troubleshooting page explains how to read Latitude’s status page.

Frequently Asked Questions

How does AI Dungeon multiplayer work? One player, the host, creates the game from the Play menu by choosing Multiplayer and then Create Game. The host opens the game menu, selects Invite Players, and shares the eight digit join code it generates. Everyone who joins plays in the same adventure, adding their own actions to one shared story, and the AI answers all of them. The host’s AI model and settings apply to every player at the table.

Is AI Dungeon multiplayer free? Latitude’s multiplayer documentation lists no membership requirement for hosting or joining a game. What a membership changes is which models and how much context the table plays on, and only the host’s membership counts. If the host has a premium plan, every player gets the host’s premium settings; if the host is on the free tier, the whole table plays on free settings, whatever the other players pay.

How do I join an AI Dungeon multiplayer game? Get the eight digit join code from the host. Open the Play menu, select Multiplayer, type or paste the code, and select Join Game. You go straight into the game screen. The adventure then appears on your home screen with the label Multi instead of Private or Public, so you can come back to it later.

How many players can join an AI Dungeon multiplayer game? There is no set limit. The (1/4) next to Invite Players is, in Latitude’s words, simply a suggestion, because actions start to overlap when many people play together. The practical limit is memory rather than seats: every player shares one context window, so each extra player makes the story forget its earlier events sooner.

Why does AI Dungeon forget things faster in multiplayer? Because the table shares one context window. On a heavily configured adventure, a free 4k model keeps roughly 600 tokens of story history, about 450 words, and four players fill that four times as fast as one. Story Cards are also only checked against the last four actions on small models, which at a four player table is at most one round. Put what must never be forgotten in Plot Essentials, which is sent on every turn.

What does Third Person do in AI Dungeon multiplayer? Third Person is a Plot Component built for multiplayer. When it is enabled, every player is asked to enter a character name, and that name replaces You in their Do and Say actions. Without it, four players all write as You, and the AI has no reliable way to tell whose action is whose.