# 风云Ⅳ（2005 国内经典版）— fy2005 / Fengyun IV (2005 Domestic Classic Edition)

> slug: `fy2005` · browser status: `playable` · native port: `40013`

The same "Fengyun IV" engine as fengyun434, captured as a different year/site snapshot, with identical Gu Long-inspired wuxia gameplay of choosing an ethnic background and making one's way through jianghu sects. Notable for an ASCII-art CAPTCHA at registration — an unusually early anti-bot measure for this engine family — and for only persisting characters who reach at least 40% experience toward level 2. Active upstream adds MXP/GMCP client protocol support.

## Play in the browser (WebAssembly)

- Landing page (description + notes): https://mudlibs.fluffos.info/fy2005/
- Play now (boots the WASM driver): https://mudlibs.fluffos.info/fy2005/play.html

## Download source ZIP

- Same-origin ZIP (trimmed source tree, no need to clone the whole repo):
  https://mudlibs.fluffos.info/fy2005/fy2005.zip
- GitHub tree: https://github.com/fluffos/mudlibs/tree/main/libs/fy2005
- README: https://github.com/fluffos/mudlibs/blob/main/libs/fy2005/README.md
- Restoration notes (NOTES.md): https://github.com/fluffos/mudlibs/blob/main/libs/fy2005/NOTES.md

## Run natively with FluffOS

1. Build a current FluffOS driver from https://github.com/fluffos/fluffos
   (native `build` / `build-debug`; see that repo's docs).
2. Download and unzip `fy2005.zip` from the URL above (or clone
   `https://github.com/fluffos/mudlibs` and use `libs/fy2005/`).
3. From the unzipped lib directory, ensure `config.fluffos` points
   `mudlib directory` at this tree (the checked-in file may contain a
   maintainer-local absolute path — edit it to your extract path).
4. Start the driver:

```bash
/path/to/fluffos/build/src/driver config.fluffos
```

5. Connect a UTF-8 MUD client to `127.0.0.1:40013`.

- Admin / wizard login: `fluffos` / `Mud@2026`
- If you host this on a public network, change the published default
  admin password before opening the port.

## Machine-readable catalog

- Site-wide catalog: https://mudlibs.fluffos.info/games.json
- Site-wide LLM overview: https://mudlibs.fluffos.info/llms.txt
- This file: https://mudlibs.fluffos.info/fy2005/llms.txt