# Dragon Quest II: rebuilding NES releases from disassembly

> Disassembles Dragon Quest II and Dragon Warrior II for the NES into banked assembly and rebuilds the US and Japanese ROMs from user-provided originals. Configuration splits ROM banks and assets, while the build compares output checksums with the destination version.

- 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/Nathan-R-Og/dq2>
- Primary source: <https://github.com/Nathan-R-Og/dq2/blob/0fb64a46310ec2c144f72c92cb640e4ec9e7691a/README.md>
- Catalog page: <https://awesomerea.org/resources/dragon-quest-ii-nes-disassembly-case/>
- Record JSON: <https://awesomerea.org/resources/dragon-quest-ii-nes-disassembly-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/dragon-quest-ii-nes-disassembly-case/index.md)

## Requirements & limits

- **Prerequisites:** A supported Dragon Quest II or Dragon Warrior II ROM is required.
- **Prerequisites:** Python and cc65 are required; the source documents Windows and WSL2 Ubuntu workflows.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/Nathan-R-Og/dq2/blob/0fb64a46310ec2c144f72c92cb640e4ec9e7691a/README.md>

## More in Games

- [Dragon Quest IV: a Nintendo DS decompilation of the European release](https://awesomerea.org/resources/dqiv-decomp-case/index.md) · Case study
- [Dragon Quest IX: matching Nintendo DS decompilation](https://awesomerea.org/resources/dqix-decomp-case/index.md) · Case study
- [Dragon Warrior 3: a matching Game Boy Color disassembly](https://awesomerea.org/resources/dragon-warrior-3-gbc-disassembly-case/index.md) · Case study
- [Dragon Warrior IV: a byte-exact NES disassembly](https://awesomerea.org/resources/dragon-warrior-iv-nes-disassembly-case/index.md) · Case study
- [Dragon Warrior: a commented NES disassembly](https://awesomerea.org/resources/dragon-warrior-disassembly-case/index.md) · Case study
- [Driver 1 decomp: matching Driver and porting it to Linux](https://awesomerea.org/resources/driver-1-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.