V2is here - see what changed

AXIOM-EMU

The Most Advanced MU Online Engine Ever Built

A rebuilt client, a rebuilt server, and endgame systems no other MU server files have - Talent Tree, Monster Affixes, the Market, Inscriptions. 100+ systems, all configured from the server. You run it, you own it.

7-day free trial · No credit card required

New in V2

A Generational Leap for MU Online

Systems you will not find in any other MU Online server files. Built into the engine, configured from the server, streamed to every client.

Talent Tree

The master skill tree, reinvented. Design your own tree in XML: up to 3 categories, tiers, ranks, prerequisites, class filters, and nodes that only work with a certain wing, set, shield or weapon.

60 talent node effects→

Monster Affixes

Diablo-style elite monsters come to MU Online.

80+ monster affixes→

The Market

The personal store, rebuilt from scratch.

7 currencies per listing→
Add-on

Inscriptions

A whole new axis of item power that no other MU server has.

110 inscriptions→
Add-on

Custom Skills

Add brand-new skills in XML. Damage, targeting (single, area, cone, line, buff, heal), stat scaling, debuffs, learn requirements, icon, tooltip and layered visual effects - no client code at all.

8 new skills included→
Add-on

Instanced Dungeons

Timed dungeons built on your existing maps, solo or with your party.

15 levels per dungeon→

Next-Gen Graphics

MU Online like you have never seen it. Per-map atmospheric fog, ambient occlusion and contact shadows, colour grading, a retuned glow, and full character shadows with see-through wings.

7 new graphics effects→

AxiomUI Interface Engine

A brand-new UI engine powers the whole game, from the login screen to the character panel, party, guild, quests, events and every new V2 window.

2 skins, live reload→

Axiom Server Manager

One window runs your whole server. Start everything in order, auto-restart crashed servers, watch CPU, RAM, players and live logs, reload configs, start events, kick players and monitor SQL Server.

1-click updates with rollback→

Signature Systems

The systems operators pick AXIOM-EMU for. Server-authoritative, configured through XML, documented end to end - and only on AXIOM.

GameData Sync
Click to enlarge
Only on AXIOM

GameData Sync

Configure once on the server and every client receives it at login. Items, skills, monsters, chaos mixes, talent trees, affixes, combat formulas, potion rates, item level curves - over 40 kinds of game data, compressed and streamed at connect. No client patches, no double maintenance, no version mismatches. Nobody else on the market does this.

60
talent node effects
New in V2

Talent Tree

The master skill tree, reinvented. Design your own tree in XML: up to 3 categories, tiers, ranks, prerequisites, class filters, and nodes that only work with a certain wing, set, shield or weapon. Around 60 node effects - stats, skill damage, skill upgrades, granted skills, EXP, drop and zen boosts. The whole layout streams to the client, so a new tree is one XML file away. The vanilla Season 6 tree is included, converted and ready.

80+
monster affixes
New in V2

Monster Affixes

Diablo-style elite monsters come to MU Online. World monsters spawn as Magic, Rare or Champion with up to four affixes - Frozen, Vampiric, Volatile, Wormhole, Pack Leader and over 80 more. Coloured health bars, auras, telegraphed area attacks you can dodge, and loot that matches the danger. Every field becomes a hunt.

7
currencies per listing
New in V2

The Market

The personal store, rebuilt from scratch. 50 listings per store, each priced in its own currency: Zen, Bless, Soul, Chaos, WCoin C, WCoin P or Goblin Points. Press S to search every store on the server by name, options and price. Coin sales run through server-side escrow, so a crash never loses a payment. Zen prices go past 4.29 billion.

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
60+ FPS

GPU-Powered Render Engine

The original MU client tied everything to 25 frames. AXIOM splits game logic from rendering, then moves the heavy work to the GPU: bones are skinned on the graphics card, particles and effects are batched, terrain draws in a fraction of the time. Boss fights that dropped to 50 FPS now hold 120. Crowded towns full of glowing gear stay smooth.

Click to expand
Zero Item Loss

Crash-Proof Persistence

Every item move is saved within two seconds. Chaos Machine items are written the moment they are placed. Saves of one account always land in order, so a relog never brings back an old inventory, and a mass logout can no longer drop queued saves. Crash mid-craft, mid-trade, mid-anything - players log back in and everything is where they left it.

Click to expand
Anti-Cheat

Anti-Cheat Built In

Every skill cast is speed-checked on the server with per-skill tuning and progressive punishment. Movement, chaos mixes and the Market are hardened against forged packets, and every rejected action can be logged by category for review.

Click to expand
28 Events

Event Timer & Entry Rules

A live schedule with countdowns for every event, now with tabs, colours and rich tooltips. Blood Castle, Devil Square, Chaos Castle, Illusion Temple and every Kalima tier carry their own level, reset, grand reset and master reset rules - shown on the ticket tooltip before players walk to the NPC. Set daily and weekly entry limits per account for Blood Castle, Devil Square, Chaos Castle, Illusion Temple, Imperial Guardian, Doppelganger and every dungeon, and players see how many runs they have left right on the timer. Eight class arenas - DK vs DK, Elf vs Elf, Survivor and more - are joined straight from the Move window.

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
Endgame content
Vanilla Season 6, extras sold one plugin at a time
Talent Tree, Monster Affixes, the Market, the Drop Codex and more - included
Updating your server
Download a zip, copy files over, hope nothing breaks
One click: signed package, full backup, migrations, automatic rollback
Next major version
Buy the new release
One free major upgrade included
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 - $100One-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
0
Fighting Players on 4 vCPU
0+
Configurable Systems
0+
Data Types Synced to Clients
Zero
Double Configurations
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.

Powered by AXIOM-EMU

Our Partners

Servers built and running on AXIOM-EMU.

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 complete set of MU Online Season 6 server files - Game Server, Data Server, Connect Server, Join Server, the client, the Axiom Server Manager, editors, and documentation. You buy a license, download the files, configure your server through XML, and run it.
What's new in V2?
V2 is a generational rebuild. A new UI engine with two skins, next-gen graphics (fog, ambient occlusion, colour grading, loot beams, full character shadows), directional sound and NPC voices, and a server that holds 800 fighting players on 4 vCPU. New endgame systems: the Talent Tree, Monster Affixes, the Market with offline stores, the Drop Codex, the PvP Kill Log, a rebuilt MuHelper with loot filters, and the paid Custom Skills, Inscriptions, Item Tiers, Achievements, Dungeons, Boss Encounters, Bestiary, Rank Badges and Summon Items modules. Plus the Axiom Server Manager with one-click updates and rollback. The full list is on the Features page.
I bought V1. Do I get V2?
Yes. Every license includes the major version it was sold under plus the next one, free. V1 licenses get V2 at no cost - download it from the portal.
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?
Every item change is saved within two seconds, and Chaos Machine items are written the moment they are placed. Saves for one account always land in order, Market coin sales run through escrow, and chaos mix results are delivered even if the window closes mid-mix. A crash or disconnect will not lose 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.
How do updates work?
The Axiom Server Manager checks for new releases and tells you when one is out - it never installs on its own. One click verifies the package signature, backs up your files and database, runs the database migrations, keeps your config edits, starts every server and checks the new version. If anything fails, it rolls everything back.
Is the Master Skill Tree included?
V2 replaces it with the Talent Tree: a fully XML-driven tree with categories, ranks, prerequisites, class filters and around 60 node effects, streamed to the client so you can redesign it without a patch. A converted copy of the vanilla Season 6 master tree is included if you want the classic layout.
Which systems are paid add-ons?
Custom Skills, Inscriptions, Item Tiers, Achievements, Dungeons, Boss Encounters, Bestiary, Rank Badges, Summon Items and Bridge are optional modules you can add to any license on the Pricing page. Everything else on the Features page - including the Talent Tree, Monster Affixes, the Market and the Drop Codex - is included in the base license.

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