Notes

The public version in all repositories of the project is temporarily not updated.

New Launcher (x32 or x64) can be downloaded from here

To fix missing api-ms-win-crt-runtime-l1-1-0.dll errors on Win 7 SP 1:

Download and install update: KB2999226

OrionUO Client

OrionUO Client - is an alternative, open source Ultima Online graphic client.
Platforms: Windows and Linux (in progress)
Rendering: OpenGL 2.0 and higher

Orion Community

Discord

WIKI

github issue tracking

Download

Download Orion Launcher to set everything up and play right away!

Other Orion Projects

Orion.dll protocol cryptography
Orion Launcher

Building OrionUO

This project requires CMake 3.7 to build. It currently supports Visual Studio 2015, 2017, GCC 7.0 and Clang 6.

Windows

On Windows, to generate the Visual Studio solution, go inside your cloned OrionUO folder and do:

md build
cd build
cmake -G "Visual Studio 2017" ..

This will build a 32bits executable. If you do want 64bits, you can do cmake -G "Visual Studio 2017 Win64" .. instead. Note that plugins are still unsupported in the 64bits client.

Or, you can use CMake-GUI to configure and generate the solution.

If you want to help converting OrionUO to SDL, you can disable ORION_WISP option in CMake. This option enables the original client implementation in pure win32 API and is kept as a reference implementation to use during the client conversion to SDL.

Linux (in progress)

$ mkdir build
$ cd build
$ cmake -G Ninja .. -DCMAKE_BUILD_TYPE=Release
$ ninja OrionUO_unity -j8
$ ./OrionUO/unity/OrionUO

You'll need a Client.cuo and a uo_debug.cfg in the working directory. Inside uo_debug.cfg you can add a line CustomPath=/path/to/uo/data, so Orion will be able to find your original client data files.