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MMCO project artwork

CurseForge · Minecraft mod

MMCO

MMO minecraft mod.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which MMCO release should I use?

Updated today
Latest stable file mmon-compat-2.0.3.jar
Game version 1.21.1
Loader Fabric

MMCO mmon-compat-2.0.3.jar targets 1.21.1 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is MMCO required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release Fabric
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

What else does MMCO mmon-compat-2.0.3.jar need?

mmon-compat-2.0.3.jar. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add MMCO without breaking your instance.

Built for MMCO mmon-compat-2.0.3.jar. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use mmon-compat-2.0.3.jar. It targets 1.21.1 with Fabric; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside mmon-compat-2.0.3.jar. It opens that exact file at the source.

About this project

What does MMCO add?

⚠ Heads-up: this mod is built for the MMCO server. It runs standalone, but many systems — the talent tree, class balance, professions, quests, mob tiers/variants, boss spawns, shop prices — are driven by server-side configuration files. **Installing just the mod gives you the built-in defaults, which are generic and out of date compared to the live server.

For the complete, tuned experience, install the official modpack instead: search for MMCO RPG on CurseForge.

MMON — a complete RPG on top of Minecraft 1.21.1 (Fabric)**

A single mod that turns your server into an MMORPG: classes with a talent tree, professions with minigames, a world split into tiers, a custom boss ladder, player-to-player economy and material-based gear generation. Everything ships in one jar, with no content-mod dependencies.

Classes & abilities - 12 classes: Warrior, Berserker, Paladin, Assassin, Joker, Archer, Monk, Mage, Healer, Warlock, Bard and Invoker — each with its own unique mechanic (weapon combos, rage and stances, shield blessings, shadows,
chakras, dual-arrow quiver, magic schools, inverted healing, soul conversion, musical buffs, summon squad).

  • Path of Exile-style talent tree: 384 nodes — 86 active abilities, 142 passives, 64 class-unique passives, 80 attribute nodes — with paths, respec and dual-class at endgame.
  • A base ability for every weapon type (22 weapon actives) plus class affinity bonuses, a bindable skill hotbar and a class-specific resource HUD (mana, rage, momentum, charges…).

Gear

  • 22 custom ores across 10 tiers (2 metals per tier + crystals), with smelting, a weapon forge and a custom enchanting table.
  • 16 weapon types (sword, axe, spear, katana, dagger, hammer, glove, scythe, shield, bow, crossbow, staff, wand, lyre, drum, horn) × material → over 1,000 weapon variants, each material with its own aptitudes.
  • Full armor per tier with a gem set into the body (11 sets, 228 pieces), tiered tools with mining gates, 38 custom enchantments scaling by tier, 20 trinkets (2 slots, up to 10 on the Joker), 245 gadgets (creeper
    hatcheries, TNT planters, launchers, elemental auras) and summoning grimoires.
  • In total: 3,489 items, 739 blocks and 714 recipes.
    World & mobs- Tiered ring world (T0–T10) spanning Overworld, Nether and End, with tier-bound biomes, rare biome-specific woods and an orchard of 40 fruits.
  • Mob scaling: 26 hostile + 10 animal variants recolored per tier, 20 mob abilities, elites, ascension and forced spawns by biome theme.
  • A ladder of 12 bosses (from the Elder Guardian to the Fallen King, with the Wither and the Ender Dragon at tiers 4 and 6), summoned through idols, each with an ability kit, VFX and a unique essence.

Professions - 12 active jobs (Slayer, Alchemist, Farmer, Miner, Explorer, Fisherman, Gatherer, Lumberjack, Hunter, Smith, Cook, Enchanter) with talents, a passive attribute per level and minigames for fishing, woodcutting and rhythm.

  • Cooking with 12 dishes across 10 buff tiers, hunting reagents, daily quests and reward tracks.
    Systems
  • Player economy: showcase shops, armor pedestals, tier-based tax, cash & gem wallet, telemetry.
  • Parties with shared XP, global leaderboard, player profiles, the Phone (hub with shop, quests, bosses, tier wiki, glossary and help), cosmetics and a built-in tutorial.

Project description from CurseForge.

Pick your setup

MMCO by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

1 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

MMCO versions and loaders

3 of 3 releases match

Looking for an older file? The official CurseForge project page is in Resources.