404 World

Key facts: 404 World (by VerseCraft) is AI interactive fiction: choose a story and step into the lead role. Pick your next move or write your own action, and the AI continues your story. The Discover grid holds playable stories across genres — fantasy, cultivation, historical romance, sci-fi and more — including fan fiction based on popular worlds such as Naruto, Harry Potter, One Piece and Lord of the Mysteries. Categories include Playthroughs, AI group chats, Light novels, Fan fiction and Community. Group chats let you talk with favourite characters in a cross-world lounge, with an affinity system (levels from Distant to Deep bond), relationship milestones and up to twelve companions. The Creator hub lets you start your own story or novel from a one-line idea, including fan fiction. The interface is in English (with Chinese and Japanese options), but many story titles and covers are in Chinese.

Plans: Free daily Energy — start without signing up, and the first story is free; reading the text is free. AI actions cost Energy: reply rounds, AI organizing (1 Energy) and image generation. Paid Energy is available on the site — check the site for current prices.

Best for: Readers who love interactive fiction and fan fiction and want to step inside a story, and anyone who enjoys roleplaying with favourite characters. Who should skip it: anyone who wants a fully English catalogue — many titles and covers are in Chinese — or a completely free, unlimited tool, since AI actions run on Energy.

Pros

• Step into the lead role — pick your next move or write your own action and the AI continues the story
• A large Discover grid of playable stories, including popular fan fiction (Naruto, Harry Potter, One Piece, Lord of the Mysteries)
• AI group chats with favourite characters — affinity levels, relationship milestones and up to twelve companions
• Create your own story or novel from a one-line idea, including fan fiction; free daily Energy and a free first story

Watch out for

• Interface is English, but many story titles and covers are in Chinese — the catalogue is not fully English
• AI actions run on Energy (reply rounds, AI organizing, image generation) — heavy use needs paid Energy, and prices are not shown on the homepage
• Starting is free without an account, but saving, creating and claiming rewards need a sign-in

Best for

Readers who love interactive fiction and fan fiction and want to step inside a story, and anyone who enjoys roleplaying with favourite characters. Who should skip it: anyone who wants a fully English catalogue — many titles and covers are in Chinese — or a completely free, unlimited tool, since AI actions run on Energy.

Pricing

Free daily Energy — start without signing up, and the first story is free; reading the text is free. AI actions (reply rounds, AI organizing, image generation) cost Energy. Paid Energy is available on the site — check the site for current prices.

FAQs

What is 404 World? AI interactive fiction: choose a story, step into the lead role, and the AI continues the story based on your choices or your own written actions.

Is 404 World free? You can start without signing up with free daily Energy, and the first story is free; reading the text is free. AI actions (reply rounds, AI organizing, image generation) cost Energy, and paid Energy is available on the site.

What stories can I play? A Discover grid of playable stories across genres (fantasy, cultivation, historical romance, sci-fi and more), including fan fiction based on popular worlds such as Naruto, Harry Potter, One Piece and Lord of the Mysteries.

What are AI group chats? Group chats where you talk with favourite characters in a cross-world lounge. Characters have affinity levels (from Distant to Deep bond) and relationship milestones, with up to twelve companions per branch.

Can I create my own story? Yes. The Creator hub lets you start a story or novel from a one-line idea, including fan fiction, and develop it with AI help.