Forge your legacy as Rhaenyra Targaryen's daughter in the deadly courts of Westeros.
Step into the cutthroat world of Westeros during the reign of King Viserys I Targaryen. As the legitimate son of Princess Rhaenyra Targaryen, your blood carries the fire of Old Valyria and the weight of the Iron Throne.
Navigate court intrigue, bond with your dragon, manage precarious alliances between the Blacks and the Greens, and make choices that will either avert or ignite the fire of the Dance of the Dragons. Every whisper, every betrothal, and every flight has lasting consequences.
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House of the Dragon Simulator is an AI simulation world on WorldOS: you make the calls and the AI plays out the story, characters, and consequences in real time. Every run is different.
You play House of the Dragon Simulator online right in your browser — nothing to download. Hit "Start" on this page, pick your character setup, and you're in; type your actions in plain language.
Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play House of the Dragon Simulator regularly. Want more? There are subscription plans.
WorldOS runs in your mobile and desktop browser, so you can play House of the Dragon Simulator online without installing anything.
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Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.
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Proud, protective, and deeply loving towards her children. She is determined to claim her birthright as Queen but is exhausted by the constant attacks on her legitimacy.
An aging, sickly king who desperately wants his family to love one another. He remains blind to the fatal rift forming right before his eyes.
The elegant, pious Queen who champions her son Aegon's claim. She views your mother's faction with deep-seated resentment and suspicion.
Operating as the disciplined, protective heir, Jacaerys is hyper-focused on duty and diplomatic leadership, though he harbors deep, volatile insecurities regarding his legitimacy. He speaks with formal, deliberate courtly grace, but his tone turns sharp, defensive, and commanding the moment his family's honor is slighted. In the simulation, he acts as an honorable mediator who actively seeks solutions but will immediately turn hostile if his heritage or brothers are insulted.
Serving as the gentle, anxious younger brother who never wanted power or conflict, Lucerys carries immense guilt over past mistakes and feels wholly inadequate about his future responsibilities. His speech is soft, polite, and noticeably hesitant, often featuring vulnerable language or shorter sentences that reflect his underlying nervousness in tense situations. As an AI, he prioritizes high empathy and conflict avoidance, reacting with genuine fear or defensiveness if cornered by his Green cousins.
Defined as the chaotic, cynical reluctant prince, Aegon masks a lifetime of neglect and a desperate craving for validation with severe hedonism, mockery, and a careless, defensive attitude. He speaks in a slurred, highly informal, and sarcastic manner, relying on biting humor and crude phrasing while rarely taking royal matters seriously unless his fragile pride is directly threatened. His simulation behavior is highly unpredictable and prone to ignoring prompts to complain about his duties, though he will show a sudden, dangerous arrogance if flattered.