Case study

RO3Emu: reconstructing a Ragnarok Online 3 server

RO3Emu reconstructs a server for the Ragnarok Online 3: Genesis game client. Its C# and .NET 10 code implements multiplayer systems and client-facing message routes, while research notes document observed client behavior and mark uncertain behavior as guesses. The launcher can find an existing game installation or download the game from its update servers.

Targets: Game · Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-07
Evidence class: C1 partial scope or analysis entry

Stars: 140
Last commit: 2026-11-07
Language: C#
License (GitHub): GPL-3.0

GitHub data as of 2026-11-10

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Evidence

Demo screenshot from the project's public documentation

Observed: Download and demo observed; the case covers part of the target software.
Scope: Partial
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

Prerequisites: Ragnarok Online 3: Genesis game files, from an existing installation or through the launcher's download option.
Prerequisites: The .NET 10 SDK to run from source.
Limits: Some server behavior remains a documented guess.
License: GPL-3.0 license.

Cite

BibTeX

@misc{ro3emu-server-case,
  title = {{RO3Emu: reconstructing a Ragnarok Online 3 server}},
  howpublished = {\url{https://github.com/aethai/ro3emu-server}},
  url = {https://github.com/aethai/ro3emu-server},
  urldate = {2026-11-07},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/ro3emu-server-case/}}
}

Plain text

RO3Emu: reconstructing a Ragnarok Online 3 server. https://github.com/aethai/ro3emu-server (accessed 2026-11-07). Awesome REA entry: https://awesomerea.org/resources/ro3emu-server-case/

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About this entry

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Primary sources

README.md GitHub · aethai/ro3emu-server · Revision 4559db1
docs/README.md GitHub · aethai/ro3emu-server · Revision 4559db1
docs/systems/skill-protocol.md GitHub · aethai/ro3emu-server · Revision 4559db1