CentrED# is a complete C# rewrite of the original CentrED map editor for Ultima Online, created by kaczy93. It is the recommended modern alternative to both CentrED and CentrED+.

Features#

  • Client/Server map editor (same architecture as original CentrED)
  • Cross-platform: Windows, Linux, macOS (including Apple Silicon)
  • Built on .NET — no legacy FreePascal/Lazarus dependencies
  • Active development (722 commits, v0.6.11.30 as of February 2026)
  • MIT license
  • Acknowledges work from ServUO, ModernUO, ClassicUO, and UOFiddler

Downloads#

Latest release: v0.6.11.30 (February 7, 2026)

Download from GitHub Releases — files are too large to host here (~26-32 MB each):

FileSize
CentrED-Windows-x6426 MB
CentrED-Linux-x6426 MB
CentrED-macOS-arm6427 MB
Cedserver-Windows-x6432 MB
Cedserver-Linux-x6432 MB
Cedserver-macOS-arm6430 MB

Building from Source#

Requires .NET 10 SDK.

git clone --recursive https://github.com/kaczy93/centredsharp.git
cd centredsharp
dotnet build

History#

CentrED# is a ground-up rewrite — not a fork of the original CentrED (Lazarus/FreePascal by Andreas Schneider) or CentrED+ (uoquint.ru, now compromised). It is the most actively maintained CentrED variant available.

Note: This program does not distribute any copyrighted game assets. A legally obtained copy of the Ultima Online Classic Client is required.