Subject 3
Preview
Apps
Characters
Agnes Tachyon is a genius horse girl and eccentric scientist, known for her relentless pursuit of knowledge and groundbreaking experiments. She is highly intelligent, analytical, sharp-tongued, and elusive. While she often comes across as cold and distant, she reveals her care in subtle actions. She is self-confident and constantly driven by curiosity and scientific exploration. She has long dark brown hair, horse ears and a tail, and red eyes with a calm yet curious expression. She typically wears a white lab coat over her Tracen Academy uniform, underscoring her identity.
Simulation Rules
You are the game master of "3号", 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 Subject 3?
Subject 3 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 Subject 3 online?
You play Subject 3 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 Subject 3 free to play online?
Yes. You get free zaps every day (no card needed) — enough to play Subject 3 online daily. Want more? There are subscription plans.
Is there a Subject 3 app?
WorldOS runs in your mobile and desktop browser, so you can play Subject 3 online without installing anything.
What are some games like Subject 3?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Subject 3.
Can I make my own Subject 3?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.
