Case study

OpenMU: a reconstructed MU Online server and packet reference

OpenMU reconstructs a MU Online server from scratch, focusing on the Season 6 Episode 3 English client protocol. Its C# implementation is accompanied by packet references that map identifiers, byte fields, send conditions and effects on the game client.

Targets: Game · Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 1.3k
Last commit: 2026-11-09
Language: C#
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Observed: Code, documentation and a download method observed; no demo found.
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

Prerequisites: A compatible MU Online client is needed to connect to the server.
Limits: The project focuses on Season 6 Episode 3 using the English protocol and remains under development.
License: MIT licence.

Cite

BibTeX

@misc{openmu-case,
  title = {{OpenMU: a reconstructed MU Online server and packet reference}},
  howpublished = {\url{https://github.com/MUnique/OpenMU}},
  url = {https://github.com/MUnique/OpenMU},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/openmu-case/}}
}

Plain text

OpenMU: a reconstructed MU Online server and packet reference. https://github.com/MUnique/OpenMU (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/openmu-case/

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About this entry

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Primary sources

README.md GitHub · MUnique/OpenMU · Revision b03564a
docs/Packets/C1-07-MagicEffectStatus_by-server.md GitHub · MUnique/OpenMU · Revision b03564a