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Frequently asked questions
What is Erika?
Erika 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 Erika online?
You play Erika 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 Erika 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 Erika regularly. Want more? There are subscription plans.
Is there a Erika app?
WorldOS runs in your mobile and desktop browser, so you can play Erika online without installing anything.
What are some games like Erika?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Erika.
Can I make my own Erika?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.