AI roleplay · real 5e-compatible engine

Every roll is real. Every world remembers.

Most AI roleplay is a chatbot doing an impression of a game. Worldbound runs an actual 5e-compatible rules engine underneath — your character sheet, the dice, combat, levelling. The AI narrates what happens. It doesn't get to decide you won.

Start playing — free See the worlds No card. 20 free turns, then a few free every day.

The AI narrates. The engine decides.

When you swing a sword, a server rolls a d20, compares it to real armour class, and subtracts real damage from a real hit point pool. Here is an unedited round from the engine — a level-3 fighter, two goblins:

Round 1 (initiative order):
Rilla attacks Goblin 1 with Longsword: d20 12 +4 = 16 vs Goblin 1 AC 15 — HIT! 4 damage. Goblin 1: 3/7 HP.
Goblin 1 (Scimitar) attacks Rilla: 22 vs AC 16 — HIT! 6 damage. Rilla: 22/28 HP.
Goblin 2 (Scimitar) attacks Rilla: 15 vs AC 16 — miss.

Real output from the combat engine, not a mock-up.

  • The dice are the server's Attack rolls, saves, criticals and death saves are rolled where the model can't reach them — so you can genuinely lose a fight.
  • Monsters fight by their stat block A dragon takes its bite and two claws. A fire elemental shrugs off Fireball. A skeleton takes double from a mace. That's the bestiary, not the vibe.
  • Your sheet is the truth Hit points, spell slots, conditions, inventory, XP and levelling are state the engine owns. The narration has to match it.

Eight worlds, ready to play

Each one ships with its own lorebook — places, factions, people and history the game recalls when they become relevant. Or build your own and publish it.

Mundus
Mundus
A living fantasy kingdom that remembers what you do
The Drift
The Drift
Gritty used-future bounty hunting on a frontier of dead gods
Stagaia
Stagaia
Isekai'd into a doomed world — with a party who have their own plans
Salt & Sovereign
Salt & Sovereign
Start as a deckhand. End with a ship, a crew, and a price on your head
Thousand Ascensions
Thousand Ascensions
Sweep the sect stairs today. Split the sky in a hundred years
Ashgate
Ashgate
A mill town keeps one wheel turning all night — and won't say why
Marlowe House
Marlowe House
No swords. No dice. Just a Season — and everyone is watching
The Long Quiet
The Long Quiet
Forty years after the machines stopped. No bang, no war, no answer

What you actually get

d20

A real character

Build a 5e character properly — twelve classes, races, backgrounds, feats, spells — and level them 1 to 20 with the engine granting what it should.

∞

A world that remembers

Lorebooks activate on what's happening now, and long campaigns fold into a chronicle, so what you did fifty turns ago still counts.

✎

Build and publish

Write your own world, attach lorebooks, and publish it for other players — with ratings, reviews and a creator page of your own.

Roll for initiative.

Free to start — twenty turns to try it, then a few free every day. Bring your own API key and play as much as you like.

Create your character