ClassicUO

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About

Ultima Online is the MMORPG whose classic client this project reimplements; per the README's copyright notice, the Ultima Online trademark is owned by Electronic Arts. ClassicUO is an open-source, cross-platform reimplementation of the Ultima Online Classic Client, built on the FNA-XNA framework in C# and primarily tested against free Ultima Online shards. It's under heavy development but functional, running natively in Chrome and as native builds for Windows (DirectX 11/OpenGL/Vulkan), Linux (OpenGL/Vulkan), and macOS (Metal/OpenGL/MoltenVK).

Getting started

The client can be played directly in Chrome or downloaded as a native build for Windows, Linux, or macOS. Running it in any form requires separately and legally owning a copy of the Ultima Online Classic Client, since the project distributes no copyrighted game assets itself.

Requires original assets. Requires legally obtaining a copy of the Ultima Online Classic Client; the project does not distribute any copyrighted game assets.

Media

Licensing & legal

Using ClassicUO to connect to official, EA-operated Ultima Online servers is explicitly forbidden by the project; it's intended for use with free or private UO shards.
Released under the BSD 4-Clause license; the code was written with reference to other open UO client/server projects (OrionUO, Razor, UltimaXNA, ServUO) and uses the FNA backend.