# Moonfall

> Moonfall is a free AI card game played in a web browser. Every card play is a prompt: an AI Game Master reads the whole board, decides what the card does in that situation, and narrates the result — so the same card lands differently every time and there is no single solved deck to copy. Cards carry no attack or health numbers, only a name, a mana cost and a line of text. Players forge new cards in the Moon Foundry, and any match can be turned into a shareable manga storybook.

- Free to play in the browser — no download, no install, no console.
- A language model resolves every card, so wording and context decide outcomes rather than fixed rules text.
- Single-player against the AI and multiplayer against other players.
- Playable in English, Japanese, Korean, Simplified Chinese, German, French, Spanish and Portuguese.

## Play

- [Play Moonfall](https://moonfall.io/play): the game itself, in the browser — no download
- [Moonfall home page](https://moonfall.io/): what Moonfall is, with art and a playable demo

## Guides

- [How to Play Moonfall](https://moonfall.io/blog/how-to-play-moonfall.md): A beginner's guide to Moonfall, the free AI card game where every card play is a prompt and an AI Game Master narrates what happens.
- [Automated Self-Play for AI Card Game Balancing](https://moonfall.io/blog/automated-self-play.md): Moonfall plays complete matches against itself and scores every finished one, so unclear cards get caught before players meet them. What ten batches showed.
- [What Is an AI Card Game?](https://moonfall.io/blog/what-is-an-ai-card-game.md): An AI card game uses a language model to adjudicate play instead of a fixed rules engine. Here's what that means — and how Moonfall works.
- [The Moon Foundry — A Guide to Fusing Cards](https://moonfall.io/blog/moon-foundry-guide.md): How the Moon Foundry works in Moonfall — fuse two cards into a new one, discover recipes, and forge cards of your own.
- [How Moonfall's AI Game Master Works](https://moonfall.io/blog/ai-game-master.md): Inside the AI Game Master that reads every card in context, narrates the match, and rewards creativity over net-decking in Moonfall.
- [Moon Dream — Conjure a Personalized Summoner](https://moonfall.io/blog/moon-dream-guide.md): How Moon Dream works in Moonfall — turn a few words into a personalized summoner and full spell deck, then take them into battle.
- [Collecting Cards, Packs & Stellar Variants](https://moonfall.io/blog/collecting-stellar-cards.md): A collector's guide to Moonfall — opening card packs, spending Stardust, chasing animated Stellar cards, unlocking cardbacks, and trading on the Moon Exchange.
- [Why Moonfall Has No Health Bars](https://moonfall.io/blog/why-no-health-bars.md): Moonfall's cards have no attack or health numbers on purpose. Here's the design thinking — why an AI referee and pure prompts beat damage math.
- [Share Your Story — Turn Your Match Into a Manga](https://moonfall.io/blog/share-your-story.md): In Moonfall your match can become a shareable manga storybook. Here's how the panels are made, how to share them, and how to read a duel like a comic.

## Reference

- [All guides](https://moonfall.io/blog): index of every guide
- [Full text](https://moonfall.io/llms-full.txt): every guide above, inlined, for one-fetch grounding
- [Sitemap](https://moonfall.io/sitemap.xml): every indexable URL

## Optional

- [日本語 guides](https://moonfall.io/blog/ja/): the same guides in 日本語; each has a .md mirror at /blog/ja/<slug>.md
- [한국어 guides](https://moonfall.io/blog/ko/): the same guides in 한국어; each has a .md mirror at /blog/ko/<slug>.md
- [中文 guides](https://moonfall.io/blog/zh-CN/): the same guides in 中文; each has a .md mirror at /blog/zh-CN/<slug>.md
- [Deutsch guides](https://moonfall.io/blog/de/): the same guides in Deutsch; each has a .md mirror at /blog/de/<slug>.md
- [Français guides](https://moonfall.io/blog/fr/): the same guides in Français; each has a .md mirror at /blog/fr/<slug>.md
- [Español guides](https://moonfall.io/blog/es/): the same guides in Español; each has a .md mirror at /blog/es/<slug>.md
- [Português guides](https://moonfall.io/blog/pt/): the same guides in Português; each has a .md mirror at /blog/pt/<slug>.md