LibreKO

10 NOVEMBER 2026

LibreKO has been taken down

On 10 November 2026, MGame Corporation, through its legal counsel, filed a DMCA takedown notice with GitHub covering the LibreKO repositories. The repositories have been removed and the project has been discontinued.

LibreKO was an open-source reimplementation of the client and server of the online game Knight Online.

Announcements continue on Discord.

The notice

Excerpt: section 2, items E and F, as GitHub forwarded it. GitHub publishes the notices it processes at github.com/github/dmca.

2. Infringing GitHub Repositories

We have identified the following publicly accessible GitHub repositories as containing and/or distributing unauthorized copies, derivative implementations, and/or portions of the copyrighted Knight Online software and materials:

[…]

E. ZeusAFK / LibreKO

https://github.com/ZeusAFK/LibreKO

The repository publicly describes itself as a reimplementation of the Knight Online game client and server.

The associated project website ([private]) further promotes the project as:
"KNIGHT ONLINE, REBUILT IN THE OPEN"
and describes it as:
"A from-scratch reimplementation of the client and the server."

The project provides a downloadable Windows client for its "public test server" and provides instructions for deploying its Login and Game server services.

The project further states that its server implements a "retail-accurate TCP" protocol.

By its own statements, the project is designed to replicate the original Knight Online client and server, to communicate using the original game's network protocol, and to operate with the original game's assets and data, which are decoded from the retail game files by the companion LibreKO-Assets tool identified below. The project is therefore an unauthorized adaptation of the Knight Online game and is designed to enable the reproduction and public use of its copyrighted content. The characterization of the project as a "from-scratch reimplementation" does not authorize the reproduction, adaptation or distribution of the copyrighted Knight Online software and materials.

We therefore allege infringement with respect to the repository as a whole.

F. ZeusAFK / LibreKO-Assets

https://github.com/ZeusAFK/LibreKO-Assets

This repository is publicly identified as an "Offline asset and data decoder" for converting game data into resources usable by the LibreKO client. Its README states that the tool "decodes an installed Knight Online client into engine-ready assets: meshes as glTF, textures as PNG, terrain as heightmaps and splat maps, effects and game tables as JSON", and that it includes a ".tbl cipher".

The associated project website expressly states that its pipeline:
"Decodes the retail formats and emits Godot-native resources."

The website identifies, among others, the following formats:

  • .n3chr / .n3pmesh – meshes
  • .dxt – encrypted textures
  • .gtd / .gtt – terrain
  • .opd – object placement
  • .tbl – data tables
  • .fxb – effects

The project therefore specifically implements functionality designed to decode, decrypt and convert the proprietary retail data formats of the original game, and thereby to reproduce the game's copyrighted models, textures, terrain, effects and data tables in new formats, without authorization.

We therefore allege infringement with respect to the repository as a whole.