# FINAL FANTASY XIV 1.23b: an experimental matching client decompilation

> Reconstructs portions of the FINAL FANTASY XIV 1.23b game client for a matching Windows executable build. The workflow splits the user-supplied ffxivgame.exe, compiles recovered C++ and assembly, and checks the output against the original.

- 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/Drahsid/ffxiv_1_23b_decomp>
- Primary source: <https://github.com/Drahsid/ffxiv_1_23b_decomp/blob/c70b77d4aa15d9c769b213198ba5d9efd2d32d19/README.md>
- Catalog page: <https://awesomerea.org/resources/ffxiv-123b-matching-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/ffxiv-123b-matching-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/ffxiv-123b-matching-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** A user-supplied 1.23b ffxivgame.exe with SHA1 04fd1c65eb0ab2e5d37d814dac1298ae2940e86a.
- **Prerequisites:** Windows and MSYS2, Python 3.12+, Git, Ninja and 7z.
- **Limits:** The project describes its matching decompilation as experimental.
- **License:** CC0-1.0 licence.

## Primary sources

1. <https://github.com/Drahsid/ffxiv_1_23b_decomp/blob/c70b77d4aa15d9c769b213198ba5d9efd2d32d19/README.md>

## More in Games

- [Fire Emblem: a partial NES disassembly of Shadow Dragon and the Blade of Light](https://awesomerea.org/resources/fe1-case/index.md) · Case study
- [Fire Emblem: Rekka no Ken — matching Japanese Game Boy Advance decompilation](https://awesomerea.org/resources/fe7j-decomp/index.md) · Case study
- [Fire Emblem: Shadow Dragon: a Nintendo DS decompilation](https://awesomerea.org/resources/fire-emblem-shadow-dragon-decomp-case/index.md) · Case study
- [fireemblem7u: a matching decompilation of the GBA Fire Emblem release](https://awesomerea.org/resources/fireemblem7u-decomp-case/index.md) · Case study
- [Flicky: byte-identical Mega Drive source reconstruction](https://awesomerea.org/resources/flicky-src-case/index.md) · Case study
- [Fossil Fighters Champions: matching the Nintendo DS battle overlay](https://awesomerea.org/resources/fossil-fighters-champions-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.