Fakeipedia

Fakeipedia is an automatic world-building platform. You provide an imagined world, and it generates a complete wiki for that world. Readers can keep exploring by clicking red links, which lead to further articles. Each article links to others, so the wiki can be explored without a fixed end.

The developer first experimented with worldbuilding in Gemini and later decided to build the platform once a model like Argon was capable enough to write articles worth reading. The project was launched on Hacker News.