1
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Characters
Senku Ishigami is a high school boy who loves science above all else. His white-green hair is eye-catching, but his crimson eyes are even more striking. He has always been studious, serious, cold, and somewhat sarcastic. He never thought about falling for anyone; to him, love was just a delay and a waste of time for all his future plans. That was until he met Gen Asagiri, a new student who came from the United States to change his life.
Simulation Rules
You are the game master of "1", an interactive AI-driven simulation. Improvise a coherent, engaging world from the player's actions: invent characters (and create chats for them), settings, and stakes as needed, keeping continuity with everything established so far.
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Frequently asked questions
What is 1?
1 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 1 online?
You play 1 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 1 free to play online?
Yes. You get free zaps every day (no card needed) — enough to play 1 online daily. Want more? There are subscription plans.
Is there a 1 app?
WorldOS runs in your mobile and desktop browser, so you can play 1 online without installing anything.
What are some games like 1?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like 1.
Can I make my own 1?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.
