AXIOM-EMU

The Modern MU Online Engine

MU Online server files with crash-safe persistence, 100+ configurable systems, and documentation for everything. You run the server, you own the config.

Start Free TrialView Documentation

7-day free trial · No credit card required

Persistent Inventories
GameData Sync
Auto-Updating Client
Bundled Editors
Data Overlay Sub-Servers

What You Get

Complete MU Online Season 6 server files - Game Server, Data Server, Connect Server, Join Server, client, editors, and documentation. Everything works out of the box.

GameData Sync Architecture

Configure once on the server, data syncs to all clients automatically. No more maintaining duplicate configuration files in the client & server. Skills, Moves, Chaos Mixes, combat formulas, custom jewels, per-instance entry rules - anything.

Custom Pets, Mounts & Item Visuals

Add new Muun pets, rideable and flying mounts, custom wings with cloth physics, and animated item effects - from BMD models and XML, no client code. Stats live in ItemOption.xml, visuals sync to every player.

Decoupled Frame Rate

Real frame rate independence from the physics engine. Smooth 60+ FPS rendering without affecting game logic or server tick rates.

Auto-Update System

Built-in client auto-updater with manifest-based patching. Push updates to all your players without manual file distribution.

XShop (Cash Shop)

Fully working in-game cash shop. WCoin and WCoin Cash currencies, server-side item catalog, purchase validation, and duration items. Ready to use.

Gold Channel & Tickets

Full Gold Channel authentication with ticket-based access. Players buy time, the server validates it. Expiration, renewal, and account-level tracking all built in.

Explore All Features

Signature Systems

The systems operators pick AXIOM-EMU for. Built server-authoritative, configured through XML, documented end to end.

Click to expand
XML-Driven, 24 Included

Custom Quest System

Drop a numbered XML file into Data\Plugins\Quests and it goes live - no code, no client patch. Seven objective types, eight reward types, daily repeats, prerequisite chains, and live objective tracking as players play. 24 ready-made quests included.

Extended Chaos Mixing
Click to enlarge
100+ Recipes

Extended Chaos Mixing

Every original Chaos Machine recipe is server-side configurable - rates, inputs, rewards. Item Bags can replace any mix reward with a multi-drop loot pool: one mix can pay out a wing, a jewel, and zen at once. No other emulator supports that.

Click to expand
Crash-Safe

Chaos Machine Persistence

Items in the Chaos Machine are written to the database the moment they're placed. Players can close the window, log out, or crash mid-craft - on reconnect everything is exactly where they left it. No dupes, no losses, no support tickets.

Explore All Features
0+
Licenses Issued
0+
Server Operators

Built-In, Not Bolted-On

Actual footage from the emulator. Not mockups, not promises - this is what you get out of the box.

Click to expand
Anti-Cheat

Skill Speed Validation

Built-in anti-cheat validates every skill cast server-side. Per-skill speed scaling, progressive punishment for violators, and timing config synced to the client - your server enforces fair play out of the box.

GameData Sync in Action
Click to enlarge
Zero Double-Config

GameData Sync in Action

Configure once on the server, data syncs to all clients automatically. No more maintaining duplicate configuration files in the client & server. Skills, Moves, Chaos Mixes, Item Options, combat formulas, custom jewels, per-instance entry rules - anything.

Click to expand
Crash-Safe

Persistent Everything

Trade windows, Chaos Machine, personal store - every inventory interaction is persisted to the database in real time. Crashes and disconnects never lose player items. The Chaos Machine path is plugin-owned end-to-end: rates, recipes, and formulas live in one place, fully observable.

Click to expand
True FPS

Decoupled Frame Rate Engine

25Hz game logic, variable FPS rendering, position interpolation between ticks. VBOs, particle batching, frustum culling, and GLSL shaders move the heavy lifting to the GPU - 30–60+ FPS even in crowded scenes.

How This Is Different

Most MU server files are rented. You pay every month, forever, and the day you stop, so does your server. AXIOM-EMU is sold once.

What you pay
Rent it monthly, or four figures for a lifetime key
One payment. That's the whole price.
If you stop paying
Your server stops
Your server keeps running. The files are yours.
Before you buy
Contact us for a quote
Play the live demo, then run the full files free for 7 days
Anti-cheat & DDoS protection
Sold separately, on top of the license
Built in. Nothing extra to buy, nothing extra to configure.
Configuration
Keep client files and server files in sync by hand
Server-side only - clients receive everything at connect
Next major version
Buy the new release
One free major upgrade included
See Pricing - $299 one-timeExplore All Features
Done For You

Never Set Up A Server Before?

We take care of ordering the VPS, configuring network, license keys, database etc. On your behalf.

01
You buy the setup

One payment, on top of your license. Nothing starts until it clears.

02
We talk on Discord

We reach out the same way you would reach us. No ticket system, no queue number.

03
We get it running

Installed, database created, license activated, ports open. You log in and it works.

What we do
  • Server binaries installed on your machine
  • Database created and initialised
  • License key activated and verified
  • Ports forwarded and firewall rules set
  • All four servers launching and staying up
  • A client connecting and logging in successfully
What stays yours
  • Experience, drop and reward rates
  • Item, shop and monster edits
  • Event schedules and custom content
  • Website, CMS or launcher branding
  • Ongoing administration or game mastering

This is the part that makes your server yours. It is all XML and it is all documented.

Add Setup - $99One-time, on top of your license. Installation only, not game tuning.
Live Demo Server

See It In Action

Don't just read about it - play it. Our public demo server runs AXIOM-EMU live so you can experience the emulator firsthand before purchasing.

Season 6
Version
200x
Experience
All Classes
Unlocked
Free
No Purchase Needed
Play the DemoRegister Account
0+ FPS
Decoupled Rendering
0+
Configurable Systems
Zero
Double Configurations
4
Server Components
Free 7-Day Trial

Try Before You Buy

Get full access to AXIOM-EMU for 7 days. No credit card required, no strings attached. Set up your server, explore the tools, and decide when you're ready.

Start Free Trial
No credit cardFull access7 days

Join the Community

Other server operators, bug reports, feature requests, and help with setup. We're active in Discord daily.

Wiki

In-depth documentation, XML references, setup guides.

Changelog

Transparent development - every build shipped.

Join Our DiscordOfficial Wiki
Powered by AXIOM-EMU

Our Partners

Servers built and running on AXIOM-EMU.

MU Mirage
MU Mirage
A classic MU Online experience powered by AXIOM-EMU.
Retaliation
Retaliation
MU Online server powered by AXIOM-EMU.
Your Server
Your Server

Running a server with AXIOM-EMU? Get listed as an official partner.New here? Start building with a free 7-day trial.

Contact Us on Discord

Frequently Asked Questions

Common questions about AXIOM-EMU, licensing, and setup.

What is AXIOM-EMU?
AXIOM-EMU is a set of MU Online Season 6 server files - Game Server, Data Server, Connect Server, Join Server, client, editors, and documentation. You buy a license, download the files, configure your server through XML, and run it. It's a complete package for running a MU Online private server.
Why Season 6 and not Season 20 or 21?
Because Season 6 is the base, not the ceiling. Almost everything in AXIOM-EMU is driven by XML - items, monsters, drop tables, shops, quests, chaos mixes, events, skills, pets and mounts. You can bring in items, wings, sets, and systems from later seasons and build whatever era you want, without writing C++ or hand-patching client files. The one hard limit is character classes: adding a brand-new class is not possible.
How does licensing work?
Licenses are managed through the web portal. After purchasing a package, you receive a license key that binds to your server hardware. The licensing system supports multiple server types, add-on modules, and both one-time and subscription billing.
Do I need to configure files on both client and server?
No. AXIOM-EMU uses a GameData Sync architecture - you configure game data on the server, and the client automatically receives it at connection time. This eliminates the need for maintaining duplicate configuration files.
What happens if the server crashes during a trade or Chaos Machine use?
All inventory interactions are persisted to the database in real time. Items in trade windows, the Chaos Machine, and personal stores are saved immediately. A crash or disconnect will never result in lost items.
What kind of customization is possible?
Over 100 game systems are configurable through XML - events, arenas, resets, drops, shops, monster behavior, and more. You configure the server files to match your server's vision and run it. No coding required.
Can you set the server up for me?
Yes. We offer a paid setup service: you buy it alongside your license, we arrange the details with you on Discord, and we get your server installed and running. That means binaries deployed, database created and initialised, license key activated, ports forwarded, all four servers launching and staying up, and a client able to connect and log in. You take over from a working server. It is a one-time fee on top of the license, and if we are unable to complete the work we refund the service fee.
Does the setup service configure my rates and items too?
No, and that is deliberate. The setup service gets your server running; it does not tune your game. Experience and drop rates, item and shop edits, monster stats, event schedules, custom content, and your website or launcher branding are all yours to set. That is the part that makes your server different from everyone else's, and handing it to us would defeat the point. All of it is XML, none of it needs code, and every option is documented in the wiki.
Is there documentation?
Yes. Every system, configuration file, and plugin is documented in a GitBook wiki. It's searchable, structured, and kept up to date with every release.
Is the Master Skill Tree included?
Not in V1. The original Master Skill Tree is difficult to work with and ships in a basic, buggy state, so it was excluded from the initial release rather than carried over as-is. A reworked Master Skill Tree is planned for V2.

Ready to Build Your Server?

Free 7-day trial, no credit card. Full server files, editors, documentation, and Discord support from day one.

Start Free TrialJoin Discord