Open-Source BDO519 Reborn

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BDO 519 Reborn is an open-source emulator project for Black Desert Online. This specific version is famous for the introduction of the Guardian (Gardienne) class and the expansion of the Succession system, representing one of the most stable and beloved eras of the game (early 2020).

Originally created by Ledie, the project has been discontinued now but maintained by Seth. Our goal is to preserve this specific version of BDO and provide a clean, functional base for the community to study and improve.


✨​

  • The Guardian Class: Fully playable with her Battle Axe and Shield.
  • Succession Skills: Access to the Succession skill trees for most classes.
  • Version Era: Based on the January 2020 retail content.
  • Open Source: The code is available for the community to review, fix, and enhance.

🤝​

We are actively looking for passionate developers, reverse engineers, and testers to join the project! Whether you are an expert in C#, Java, or C++, or simply a BDO enthusiast who knows the game mechanics inside out, your help is welcome.

How you can contribute:

  • Bug fixing (Packet handling, AI behaviors, Quests).
  • Cleaning up the codebase and improving performance.
  • Documenting the API and database structures.
  • Testing and reporting issues.

📥​

This project is for educational and research purposes. We believe in the "Open Source Spirit"—no selling of files or exclusive "pay-walled" fixes. Everything we do is shared with the community.

  • Project Lead: Seth
  • Original Creator: Ledie
  • Discord Community:
  • GitHub Repository: (Soon posted, source are available on GDRIVE for now:


📜​

  1. This is a non-commercial project.
  2. Respect the contributors and the work already done.
We look forward to seeing you in the community and working together to make this the best BDO emulator available !
image_2026-01-04_133203072 - Open-Source BDO519 Reborn - RaGEZONE Forums
 
Last edited:
Is there plans to keep the version as is but add the other classes?
Hello, someone asked in our Discord server ! It's a good question.

For now, it's not planned to add any other content from the official game to the emulator. I don't want to do like the World of Warcraft Emulation scene by adding more update after update of content to the emulator.

At the end, it just add more broken content and things to fix.

For now i think the priority is to fix what it's needed to fix on that version of the game :D

Source code has been posted there, without the game data (because it's too heavy)

But will be easier for those who wants to contribute, if you still want to download the whole thing, it's on the Google Drive


 
Thanks for the response.
I will have to ask further question, is there a list of what is working, not working and working on it status?
This will give more information to enthusiasts what to expect, what to test and what to add.
Not yet we just started setting and checking it all, first priority was to update it to newer java versions which we already achieved with minimal modifications, next step is to see whats missing and what needs stability improvements
 
Are you guys planning to have a public project management board so we can see the development?
i don't think so for now, but maybe we will set up some kaban style board later as we progress
 
hi, i tried ledie's file of guardian ver and the succ skills and awakening of guardian is messed up. even succ ninja, shai skills wont work either. are those fixed?
 
Nice :) I'll joining this project to check out, what I can do.
 
Does anyone know why when I use the .bag add command the game crashes and I can't log in until I delete the item from MongoDB?
 
Does anyone know why when I use the .bag add command the game crashes and I can't log in until I delete the item from MongoDB?

Because this item exists on the server, but it's missing from the client-side database
 
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