Welcome to the MUD games of Iron Realms Entertainment

The World’s Deepest Free Online Text RPGs.
No Download Required.

Craft a legacy among thousands of players building their own stories. Play in your browser, free forever.

Five free games · No download · Browser-based · Active since 1997

What game designers say about Achaea

“I don’t believe there’s another game in existence with this much depth.”
John Romero Legendary game designer, creator of Doom and Quake

“Few virtual worlds with immensely complicated combat systems avoid being completely dominated by them. Achaea is the best-known exception.”
Richard Bartle Co-creator of the first MUD, 1978

A dark, dank cell. (indoors) Acrid smoke curls in the air as the flame sputters noisily upon its burning wick. In the corner, splatters of dried blood are half frozen where they slid down the stones. [Tip]: Type LOOK to get your bearings: what is here, and which way out. You see a single exit leading northwest. An old man crouches at the edge of the candlelight, his silhouette thin and stooped. The cell door has been locked from the other side. A hooded symbol is cut into the chamber wall, its lines deep and old. [SAY Yes] - Take the key. An old man in dirty grey robes furtively slips you a small, rusted iron key. [Tip]: Type UNLOCK DOOR NW to work the key. The key goes in. The door swings open. A dank hallway. (indoors) Cobbled slabs of stone course throughout the corridor, the bricks glistening with a thick film of moisture. You see exits leading east and west. A pygmy guard blocks the way ahead, bigger than you expected. [Tip]: Type PUNCH PYGMY, KICK PYGMY, or HEADSLAM PYGMY to attack. You thrust your arm out in a quick jab at a pygmy guard. Damage dealt: 100 (physical blunt). A pygmy guard slips a knife out from its sheath and quickly stabs you! Health lost: 21 (physical blunt). You must regain balance first. You have recovered balance on all limbs. Two pygmy guards fill the doorway, torchlight at their backs and iron in their hands. Your health is low. You take a drink from an oaken vial. The elixir heals and soothes you. A pygmy guard is here, dead. You have slain a pygmy guard, retrieving the corpse. Damage dealt: 43 (physical cutting). *** Congratulations! You have reached level 2! *** You pick up a small pile of golden sovereigns. You put 500 gold sovereigns in a canvas backpack. A stinky corridor. (indoors) Blackened bricks cobble the floor of this junction, their edges rounded by wet and wear. You see exits leading southeast and west. A pygmy brander crouches here, a branding iron loose in its fist. The vile pygmy drops the iron, snatches the blade off the fallen guard, and comes at you. Health lost: 18 (physical cutting). You open the pygmy tally ledger. A candlelit chamber. (indoors) Sheets of blackened stone roll into a circular space, the surrounding walls staggered and uneven. Drathi's tail flicks about absently as he surveys the area. Nima de Vermiis holds out an oaken vial that's warm to the touch. The vitality of the black boar begins to flow through you. *** Congratulations! You have reached level 5! *** A narrow turn of the stair. (indoors) The old man suddenly appears, placing a hand on your shoulder. You feel fresh cold air on your face. A dark, dank cell. (indoors) Acrid smoke curls in the air as the flame sputters noisily upon its burning wick. In the corner, splatters of dried blood are half frozen where they slid down the stones. [Tip]: Type LOOK to get your bearings: what is here, and which way out. You see a single exit leading northwest. An old man crouches at the edge of the candlelight, his silhouette thin and stooped. The cell door has been locked from the other side. A hooded symbol is cut into the chamber wall, its lines deep and old. [SAY Yes] - Take the key. An old man in dirty grey robes furtively slips you a small, rusted iron key. [Tip]: Type UNLOCK DOOR NW to work the key. The key goes in. The door swings open. A dank hallway. (indoors) Cobbled slabs of stone course throughout the corridor, the bricks glistening with a thick film of moisture. You see exits leading east and west. A pygmy guard blocks the way ahead, bigger than you expected. [Tip]: Type PUNCH PYGMY, KICK PYGMY, or HEADSLAM PYGMY to attack. You thrust your arm out in a quick jab at a pygmy guard. Damage dealt: 100 (physical blunt). A pygmy guard slips a knife out from its sheath and quickly stabs you! Health lost: 21 (physical blunt). You must regain balance first. You have recovered balance on all limbs. Two pygmy guards fill the doorway, torchlight at their backs and iron in their hands. Your health is low. You take a drink from an oaken vial. The elixir heals and soothes you. A pygmy guard is here, dead. You have slain a pygmy guard, retrieving the corpse. Damage dealt: 43 (physical cutting). *** Congratulations! You have reached level 2! *** You pick up a small pile of golden sovereigns. You put 500 gold sovereigns in a canvas backpack. A stinky corridor. (indoors) Blackened bricks cobble the floor of this junction, their edges rounded by wet and wear. You see exits leading southeast and west. A pygmy brander crouches here, a branding iron loose in its fist. The vile pygmy drops the iron, snatches the blade off the fallen guard, and comes at you. Health lost: 18 (physical cutting). You open the pygmy tally ledger. A candlelit chamber. (indoors) Sheets of blackened stone roll into a circular space, the surrounding walls staggered and uneven. Drathi's tail flicks about absently as he surveys the area. Nima de Vermiis holds out an oaken vial that's warm to the touch. The vitality of the black boar begins to flow through you. *** Congratulations! You have reached level 5! *** A narrow turn of the stair. (indoors) The old man suddenly appears, placing a hand on your shoulder. You feel fresh cold air on your face.

Start here

Learn About MUD Games

MUD games predate the graphical MMO genre by over 20 years. These pages cover what they are, how the mechanics work, and why tens of thousands of players have stayed in them for decades.

The main guide

The Complete MUD Game Guide

Everything Iron Realms knows about MUD games: the history, the mechanics, the player culture, the best games running today. The definitive reference for anyone serious about the genre, from first week to decade veteran.

Explore the guide

A MUD games guide book floating in the air with a text help file on the right side

Actively Developed Games

Two Worlds, Both Free.

Achaea and Aetolia are in active development, have been running for over two decades, and are free to play in your browser without a download.

A warrior with a warhammer braced to fight a huge horned dragon in a ruined stone hall.

High Fantasy Est. 1997, Flagship

Achaea, Dreams of Divine Lands

High fantasy, 20+ classes, six player-run city-states.

The first Iron Realms game and still the largest. Achaea's combat system tracks dozens of afflictions across 100+ abilities per class, and six city-states hold actual elections to determine who controls them. Achaea's combat system has been expanding since 1997, which means the veterans have had almost three decades to figure out ability combinations you haven't seen yet. The players who find their footing tend to stay for years, then decades.

20+Classes
6City-States
100+Abilities per class
Level 99Become a dragon

Play Achaea Free Learn More

Hooded figures raising their hands around a robed caster wreathed in flame inside a candlelit cathedral.

Dark Fantasy Est. 2002, Dark Fantasy

Aetolia, the Midnight Age

Dark fantasy, 30+ classes, a massive player-built economy.

Aetolia runs darker. The factions have been at war for centuries, and the players running the city-states are the ones deciding how that war is fought. Thirty-plus classes with multiclassing, vampire mechanics, and a sprawling library of unique player-designed items circulating in the economy. If you've ever wanted to play a vampire who also holds elected office in an undead city-state, Aetolia is the only game that takes that premise seriously.

30+Classes
20k+Explorable rooms
20+Tradeskills
24Playable Races

Play Aetolia Free Learn More

Looking for Lusternia, Imperian, or Starmourn? Browse all five Iron Realms games. These three are in community/legacy mode, but still playable and free.

27 Years Running

These Worlds Have Been Running Since Before Steam Existed.

Iron Realms has been building text-based RPGs since 1997. Players who rolled their first character in the late '90s are still logging in because the worlds never stopped changing around them.

Text enables deeper mechanics. The combat system tracks dozens of simultaneous afflictions, defences, buffs, and debuffs because there’s no frame budget. The economy holds over a hundred thousand unique player-designed items because text storage costs nothing. A political system where someone runs a three-month campaign to win a city council seat by two votes, gets impeached the following week, and somehow claws their way back into office by Friday exists because text doesn’t constrain what players can build with the governance tools.

Graphical MMOs stopped surprising most players years ago. These haven’t.

Read: The Complete MUD Game Guide

24/7 World runs whether you're in it or not

0 Server wipes since launch

100+ Abilities per class in every fight

100% Player-driven world history

No Download Required

Start Playing in Under a Minute.

Creating a character takes less time than reading this paragraph. By tomorrow, the political map will look different, someone’s crafting empire will have changed hands, and a fight that’s been building for weeks will finally break open. These worlds move every day. The easiest way to find out what that feels like is to log in tonight.

Create Your Character Free

Not sure which game to start with? Compare Achaea and Aetolia side by side. Two minutes.

1,000,000+ Characters created across five free worlds. Some of those players started in 2001 and are still here. Your character doesn’t exist yet.

From the Realms

Latest Updates

New developments, events, and stories from across the Iron Realms.

The Menagerie Is Open, And Five More Are Waiting

August 8, 2026

The Menagerie is open. It is the first of six attractions at the Iron Carnival, and it came with a gryphon fledgling, a lunar fox, a ku’ati kit and a…
A Roguelike in Achaea, a Year 20 Celebration in Aetolia, and a Summer of New Things to Do

July 9, 2026

Achaea launched a roguelike dungeon, Aetolia turned 20, and both games shipped a summer of new systems and quality-of-life fixes.
New Perks for Newsletter Subscribers

May 29, 2026

Stay on top of all the news and happenings in the Iron Realms with a newsletter sent directly to your inbox. Subscribe to any or all games as well as…

The Menagerie Is Open, And Five More Are Waiting

August 8, 2026

The Menagerie is open. It is the first of six attractions at the Iron Carnival, and it came with a gryphon fledgling, a lunar fox, a ku’ati kit and a…
A Roguelike in Achaea, a Year 20 Celebration in Aetolia, and a Summer of New Things to Do

July 9, 2026

Achaea launched a roguelike dungeon, Aetolia turned 20, and both games shipped a summer of new systems and quality-of-life fixes.

The World’s Deepest Free Online Text RPGs.
No Download Required.

What game designers say about Achaea