RunUO Releases
From the first revolutionary beta in 2002 to today's production-ready releases. Explore over two decades of continuous innovation in UO server emulation.
Current Releases
Latest stable versions available for download
RunUO 3.1 - Latest
Recommended for production
Modern .NET Support
Updated for .NET 8 with latest C# language features
Enhanced Performance
Optimized core engine with improved memory management
Complete Script Library
Full OSI-accurate content with modern enhancements
Historical Timeline
The remarkable journey from revolutionary beta to industry standard. Each release marked a milestone in virtual world development.
RunUO Beta 1
The Beginning
First public beta that changed everything. Announced on runuo.com with the revolutionary walking engine that outperformed all existing UO emulators.
The birth of what would become the most influential UO server emulator. Featured the first smooth walking system that accurately replicated EA's server mechanics.
Beta Series
Rapid Innovation
36+ beta releases over 2 years. Each iteration brought new features, bug fixes, and expanded compatibility with Ultima Online's evolving client.
Unprecedented development velocity with betas 2-36+ documented. Community-driven feedback cycles that established RunUO's quality standards.
RunUO 1.0.0
First Stable Release
The landmark 1.0 release marked RunUO's transition from experimental software to production-ready server platform.
Feature-complete implementation supporting the full Ultima Online experience. Established RunUO as the industry standard.
RunUO 2.0 RC1
Open Source Revolution
First release candidate of 2.0 alongside the opening of public SVN. Marked RunUO's commitment to open-source development.
Public repository launched, enabling community contributions. Architectural improvements and enhanced scripting capabilities.
RunUO 2.0 RC2
Refinement Period
Second release candidate focused on stability improvements and bug fixes based on extensive community testing.
Community feedback integration, performance optimizations, and compatibility enhancements for evolving UO clients.
RunUO 2.0 Final
Production Excellence
The definitive 2.0 release that powered thousands of servers worldwide. Set new standards for reliability and performance.
Battle-tested stability, comprehensive feature set, and the foundation that countless servers would build upon.
RunUO 2.1
Continued Excellence
Enhanced version with improved performance, additional features, and expanded client compatibility.
Performance optimizations, new scripting features, and enhanced administrator tools for server management.
The Future
Continuous Innovation
RunUO continues to evolve, maintaining its position as the foundation of UO emulation while embracing modern technologies and development practices.
Ready to Build Your World?
Join thousands of server administrators who trust RunUO to power their virtual worlds. Download the latest release and start building today.