Highly Performant & Scalable Ultima Online Server Emulator https://www.modernuo.com
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fix: Special moves and various UOR+ bonuses (#2384)
## Special moves
Special moves were added [27 Apr, 2000.](https://uo.com/wiki/ultima-online-wiki/technical/previous-publishes/2000-2/2000-publish-05-27th-april/). This is well past the discussed cutoff date for T2A, which is **[Nov 23, 1999 - Publish 1](https://uo.com/wiki/ultima-online-wiki/technical/previous-publishes/1999-2/1999-publish-01-23rd-november/)** as per the UOSecondAge shard which is the golden standard for T2A accuracy and represents a logical cutoff for this era. 

Regarding the specific date: **Nov 23, 1999 (Publish 1)** - the game significantly changed as a "pre-patch" to UOR on this date, and UOSecondAge picks and chooses from this date based on QoL features, while keeping the gameplay accurate to what is widely known as the "T2A era". However this date is ~4 months before the actual UOR release date.

## Defensive wrestling
Defensively wrestling as (eval+anat)/2 was added in [publish 16](https://uo.com/wiki/ultima-online-wiki/technical/previous-publishes/2002-2/publish-16-changes-and-bug-fixes-24th-july/) and should be gated behind !Core.LBR
* "Unarmed “to-be-hit” changes (chance to get hit while unarmed is now the better of either Wrestling skill, or an average of Anatomy & Evaluate Intelligence)."

## Lumberjacking damage bonus

Lumberjacking damage bonus was added in [UOR](https://uo.com/wiki/ultima-online-wiki/technical/previous-publishes/2000-2/2000-publish-05-27th-april/)

## Anatomy and LJ +10% GM bonus
Anatomy/LJ +10% GM bonus was added in [pub 13](https://uo.com/wiki/ultima-online-wiki/technical/previous-publishes/2001-2/2001-publish-13-19th-august/), which was during UOTD.
2026-03-22 10:55:01 -07:00
.config feat: Adds SerializableFieldChanged option (#2324) 2026-02-01 21:28:26 -08:00
.github chore: Adds AI instructions and SKILLs for ModernUO codebase (#2347) 2026-03-01 11:42:19 -08:00
dev-docs docs: Updates CLAUDE dev-docs/skills for serialization (#2372) 2026-03-15 01:05:03 -07:00
Distribution/Data feat: Adds Network Packet Documentation (#2302) 2026-01-01 17:52:56 -08:00
docs chore: Fixes 0x78 and min client version for packets.html (#2322) 2026-01-31 10:58:13 -08:00
Projects fix: Special moves and various UOR+ bonuses (#2384) 2026-03-22 10:55:01 -07:00
.cursorrules chore: Adds AI instructions and SKILLs for ModernUO codebase (#2347) 2026-03-01 11:42:19 -08:00
.editorconfig chore(docs): Adds UnmanagedDataReader & BinaryFileReader documentation (#1968) 2024-10-01 17:07:51 -07:00
.gitattributes fix: Adds migration checks to CICD, updates dependencies, adds Fedora 37, alpine 3.17 support (#1309) 2022-12-22 12:12:47 -08:00
.gitignore chore: Adds AI instructions and SKILLs for ModernUO codebase (#2347) 2026-03-01 11:42:19 -08:00
AGENTS.md chore: Adds AI instructions and SKILLs for ModernUO codebase (#2347) 2026-03-01 11:42:19 -08:00
azure-pipelines.yml feat: Adds .NET 10 / C# 14 support. (#2258) 2025-11-11 11:26:34 -08:00
CLAUDE.md docs: Updates CLAUDE dev-docs/skills for serialization (#2372) 2026-03-15 01:05:03 -07:00
CODE_OF_CONDUCT.md Create CODE_OF_CONDUCT.md 2020-05-05 08:51:39 -07:00
CONTRIBUTING.md chore(license): Removes CLA requirement. All contributors moving forward will retain copyright. (#2038) 2024-12-31 02:52:58 -08:00
Directory.Build.props fix: Bumps deps. Updates copyrights (#2353) 2026-03-05 19:36:54 -08:00
FAQ.md docs: Updates FAQ for time zone issues. (#1368) 2023-03-10 00:18:36 -08:00
GEMINI.md chore: Adds AI instructions and SKILLs for ModernUO codebase (#2347) 2026-03-01 11:42:19 -08:00
global.json feat: Adds .NET 10 / C# 14 support. (#2258) 2025-11-11 11:26:34 -08:00
LICENSE Fixes more line ending issues (#267) 2020-09-27 13:54:56 -07:00
mkdocs.yml chore: Fixes github pages (#2303) 2026-01-01 19:35:35 -08:00
ModernUO.sln fix: Updates Visual Studio version in solution file to Visual Studio 2026 (#2285) 2025-12-01 14:46:36 -08:00
publish.cmd fix: Fixes publishing (#1808) 2024-05-31 12:59:59 -07:00
publish.sh fix: Fixes publishing (#1808) 2024-05-31 12:59:59 -07:00
README.md feat: Upgrades networking to use io_uring. (#2315) 2026-02-01 16:02:32 -08:00
rider-settings.zip Cleanup/Housekeeping (#242) 2020-09-12 15:31:21 -07:00
Rules.ruleset chore(docs): Adds UnmanagedDataReader & BinaryFileReader documentation (#1968) 2024-10-01 17:07:51 -07:00
SPONSORS.md chore: Updates readme files (#2247) 2025-07-27 11:04:32 -07:00
stylecop.json Updates formatting rules (#199) 2020-08-25 18:00:51 -07:00
THIRD-PARTY-NOTICES docs: Adds RunUO-Encryption notice attribution to DarkStorm (#2369) 2026-03-12 23:35:47 -07:00
version.json feat: Upgrades networking to use io_uring. (#2315) 2026-02-01 16:02:32 -08:00

ModernUO - Ultima Online Server Emulator for the modern era!

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Ultima Online Server Emulator for the modern era!

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Requirements

Supported Operating Systems

Windows 10/11/2012/2016/2019/2022/2025 MacOS 14+ Debian 12+ Ubuntu 22+ LTS
Alpine 3.22+ Fedora 42+ RedHat 9+ CentOS Stream 9+ openSUSE 15.6+ SUSE Enterprise 15 SP6 Linux Mint 21+ Arch

Required Frameworks

All Operating Systems

.NET

Windows

VC++ Redistributable v14

Development

git .NET

Supported IDEs

Jetbrains Rider 2025.3+ space VSCode space Visual Studio 2026

Getting Started

  • Install prerequisite requirements
  • Clone this repository (or download the latest):
    • git clone https://github.com/modernuo/ModernUO.git
  • Open ModernUO.sln to start developing

Building/Publishing

  • Run ./publish.cmd [release|debug (default: release)] [os] [arch (default: x64)]

Linux Prerequisites

Fedora, CentOS, RHEL, etc

dnf upgrade --refresh -y
# CentOS does not come with EPEL enabled
dnf install -y epel-release epel-next-release
dnf install -y findutils libicu libdeflate-devel zstd libargon2-devel liburing-devel

Ubuntu, Debian, etc

apt-get update -y
apt-get install -y libicu-dev libdeflate-dev zstd libargon2-dev liburing-dev

OSX Requirements

brew install icu4c libdeflate zstd argon2

Running the Server

  • Follow the publish instructions
  • Run ModernUO.exe or dotnet ModernUO.dll from the Distribution directory

Troubleshooting / FAQ

Want to sponsor?

Thank you for supporting us! You can find out how by visiting the sponsors page.

Collaborators

Kamron Batman Mark1145

Thanks

  • RunUO Team & Community
  • Voxpire, the ServUO Team & Community
  • Karasho, Jaedan and the ClassicUO Community



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