Yuanzai World – LLM RPGs with branching world-lines
Hi HN, I'm Kai Wang, one of the creators of Yuanzai World. We built a simulation engine (currently on iOS & Android) that allows the community to create and share text adventures populated by multiple LLM-based agents. Unlike standard chatbots, our focus is on community co-creation—users define the worldviews, and our agents (with persistent memory and social relationships) bring them to life. The cool part: We implemented a system we call "World-Line Divergence" (inspired by visual novels like Steins;Gate). Usually, AI RPGs feel random or infinite loop. We built a state machine that tracks…
Yuanzai World – LLM RPGs with branching world-lines launched on January 10, 2026 with 31 votes, #630 of 14,584 launches that month and more than 95% of that year's launches.
In plain words
Yuanzai World is a simulation engine for iOS and Android that lets users create and share text-based role-playing adventures featuring multiple AI agents with persistent memory and social relationships. Players define the world's rules while AI characters populate it, responding dynamically to player choices. The platform's "World-Line Divergence" system tracks how player interactions deviate from the original narrative, triggering branching story paths that lead to different endings rather than random or repetitive outcomes. It emphasizes community co-creation over standalone chatbot gameplay.
written from the facts on this page · September 2026
From the sources
Yuanzai World (codename) is a story-driven adventure game powered entirely by AI, where players travel with Yuanzai through various fantasy worlds, interacting with characters, experiencing stories, changing the world, and finding the courage to face reality.
Freely explore the vast expanse of time and space, always stay curious about the future! Reverse established facts and alter the worldline's rate of change? Tell Yuanzai your thoughts and travel through time and space together! Share with your friends and move towards the ideal worldfrom yuanzai.world
In the maker’s words, at launch
Hi HN, I'm Kai Wang, one of the creators of Yuanzai World. We built a simulation engine (currently on iOS & Android) that allows the community to create and share text adventures populated by multiple LLM-based agents. Unlike standard chatbots, our focus is on community co-creation—users define the worldviews, and…
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