# The World Ends With You: reconstructing the Nintendo DS codebase

> The World Ends With You reconstructs the Nintendo DS game's code for its US and Japanese releases. The project builds from user-supplied ROMs and documents asset formats including PACK archives, graphics, text, fonts and tables.

- 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/Yotona/twewy>
- Primary source: <https://github.com/Yotona/twewy/blob/3f916f1a2d31f29bd7ec6fd89f3a87b696e79b9b/README.md>
- Catalog page: <https://awesomerea.org/resources/the-world-ends-with-you-ds-case/>
- Record JSON: <https://awesomerea.org/resources/the-world-ends-with-you-ds-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/the-world-ends-with-you-ds-case/index.md)

## Requirements & limits

- **Prerequisites:** A legitimately obtained US or Japanese .nds ROM is required for its corresponding build.
- **Prerequisites:** Windows or Linux, Python 3.11+, GCC 9+ and Ninja are required.
- **Prerequisites:** A byte-matching build also requires an ARM7 BIOS copy.
- **License:** CC0-1.0 license applies to repository code.

## Primary sources

1. <https://github.com/Yotona/twewy/blob/3f916f1a2d31f29bd7ec6fd89f3a87b696e79b9b/README.md>
2. <https://github.com/Yotona/twewy/blob/3f916f1a2d31f29bd7ec6fd89f3a87b696e79b9b/docs/asset-format-analysis.md>

## More in Games

- [TicTacToe-AI: a bounded REA-fork reconstruction of one game method](https://awesomerea.org/resources/rea-engine-tictactoe-case/index.md) · Case study
- [Tokimeki Memorial: Forever With You: a PS1 decompilation in progress](https://awesomerea.org/resources/tokimeki-memorial-ps1-decomp-case/index.md) · Case study
- [Tom and Jerry: War of the Whiskers: an experimental GameCube decompilation](https://awesomerea.org/resources/wotwdecomp-case/index.md) · Case study
- [Tomb Raider: Legend: a cdcEngine decompilation](https://awesomerea.org/resources/tomb-raider-legend-cdc-engine-case/index.md) · Case study
- [tomb3: decompiling PC Tomb Raider 3](https://awesomerea.org/resources/tomb3-tomb-raider-3-case/index.md) · Case study
- [TOMB4: decompiling the PC version of Tomb Raider 4](https://awesomerea.org/resources/tomb4-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.