# d3b-emu: reconstructing a Diablo III Beta server

> d3b-emu reconstructs a server for Diablo III Beta client version 0.3.0.7447 in C# and .NET 8. Based on an earlier mooege version, it updates opcodes and message definitions and implements beta-era game systems, while Battle.net handling, item persistence and skill accuracy remain incomplete.

- Type: Case study
- Targets: Game · Protocol
- 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/Crypto137/d3b-emu>
- Primary source: <https://github.com/Crypto137/d3b-emu/blob/47275e8d659da6033ae736b8e403790d42db06d8/README.md>
- Catalog page: <https://awesomerea.org/resources/d3b-emu-diablo-iii-beta-case/>
- Record JSON: <https://awesomerea.org/resources/d3b-emu-diablo-iii-beta-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/d3b-emu-diablo-iii-beta-case/index.md)

## Requirements & limits

- **Prerequisites:** Diablo III Beta client 0.3.0.7447 and its ClientData.mpq, CoreData.mpq and base patch files are required.
- **Prerequisites:** The server is built for .NET 8.
- **Limits:** Battle.net and game server systems are unfinished; item saves and some skill behavior remain inaccurate.
- **License:** AGPL-3.0 licence.

## Primary sources

1. <https://github.com/Crypto137/d3b-emu/blob/47275e8d659da6033ae736b8e403790d42db06d8/README.md>

## More in Games

- [DARK: reconstructing the video plugin path for Proton cutscenes](https://awesomerea.org/resources/dark-render-re-case/index.md) · Case study
- [Darkflame Universe: LEGO Universe server reconstruction](https://awesomerea.org/resources/darkflame-universe-case/index.md) · Case study
- [darling-lol: running the macOS League of Legends client on Linux through Darling](https://awesomerea.org/resources/darling-lol-league-linux-case/index.md) · Case study
- [Deathchase: annotated game disassembly](https://awesomerea.org/resources/deathchase-disassembly-case/index.md) · Case study
- [Defender: annotated arcade disassembly](https://awesomerea.org/resources/defender-arcade-disassembly-case/index.md) · Case study
- [Destiny 2 build 86657: Sunrise/Dawn reconstruction research report](https://awesomerea.org/resources/destiny2-build-86657-reconstruction-report-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.