Twenty years ago, the crown prince vanished after a coup d'état brought a usurper to the throne. Now, he has returned to reclaim his birthright and liberate the kingdom from an illegitimate ruler.
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Frequently asked questions
What is Heir?
Heir 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.
How do I play Heir online?
You play Heir 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.
Is Heir free to play online?
Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play Heir regularly. Want more? There are subscription plans.
Is there a Heir app?
WorldOS runs in your mobile and desktop browser, so you can play Heir online without installing anything.
What are some games like Heir?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Heir.
Can I make my own Heir?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.