# Phantasy Star Online Ver. 2: a hybrid Dreamcast matching decompilation

> Phantasy Star Online Ver. 2 is being reconstructed from C/C++ and typed static data for its European Dreamcast release. Complete function ranges are compared with the decoded executable; unmatched code is supplied through fallback assembly generated from the user's dump. The author reports that the matching source covers part of the executable.

- 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/finalbillybong/pso_ver2_dc_decomp>
- Primary source: <https://github.com/finalbillybong/pso_ver2_dc_decomp/blob/ff6f8e088f4040d38d9b674147789f49a2d48aef/README.md>
- Catalog page: <https://awesomerea.org/resources/phantasy-star-online-ver-2-dreamcast-case/>
- Record JSON: <https://awesomerea.org/resources/phantasy-star-online-ver-2-dreamcast-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/phantasy-star-online-ver-2-dreamcast-case/index.md)

## Requirements & limits

- **Prerequisites:** A matching European MK-5119350 V1.000 game dump is required.
- **Prerequisites:** Linux setup uses the pinned CodeWarrior for Dreamcast 2.4 compiler; some SDK units use Hitachi SHC.
- **Limits:** The author reports that much code remains fallback assembly and some data remains extracted from the dump.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/finalbillybong/pso_ver2_dc_decomp/blob/ff6f8e088f4040d38d9b674147789f49a2d48aef/README.md>
2. <https://github.com/finalbillybong/pso_ver2_dc_decomp/blob/ff6f8e088f4040d38d9b674147789f49a2d48aef/docs/PROGRESS.md>

## More in Games

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## 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.