# Milon's Secret Castle: an annotated NES disassembly

> Milon's Secret Castle reconstructs the US NES game as annotated assembly that builds with asm6f. A verification script compares the built ROM with the original, while Mesen Lua scripts visualize doors, movement, hitboxes and room secrets.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/jasonmray/MilonsSecretCastle>
- Primary source: <https://github.com/jasonmray/MilonsSecretCastle/blob/06827c7f7ee9bccb450f0cdb41277af651cfaeeb/readme.md>
- Catalog page: <https://awesomerea.org/resources/milons-secret-castle-disassembly-case/>
- Record JSON: <https://awesomerea.org/resources/milons-secret-castle-disassembly-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/milons-secret-castle-disassembly-case/index.md)

## Requirements & limits

- **Prerequisites:** The US version of Milon's Secret Castle.
- **Prerequisites:** asm6f for assembly; Perl for the comparison script.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/jasonmray/MilonsSecretCastle/blob/06827c7f7ee9bccb450f0cdb41277af651cfaeeb/readme.md>
2. <https://github.com/jasonmray/MilonsSecretCastle/blob/06827c7f7ee9bccb450f0cdb41277af651cfaeeb/MesenLuaScripts/readme.md>

## More in Games

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- [MissionFleet: reconstructing the NavyFIELD 2.062 client and server stack](https://awesomerea.org/resources/missionfleet-case/index.md) · Case study
- [mkgp2-decomp: matching Mario Kart Arcade GP2 main.dol](https://awesomerea.org/resources/mkgp2-decomp-case/index.md) · Case study
- [mlbis: matching Mario & Luigi: Bowser's Inside Story decompilation](https://awesomerea.org/resources/mlbis-decomp-case/index.md) · Case study
- [Monster Hunter 2 (Dos): matching the PS2 boot executable and overlays](https://awesomerea.org/resources/monster-hunter-2-dos-decomp-case/index.md) · Case study
- [Monster Hunter Tri: a matching Wii decompilation](https://awesomerea.org/resources/monster-hunter-tri-wii-decomp-case/index.md) · Case study

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.