An MMO is a massively multiplayer online game: a persistent online world where hundreds or thousands of players share the same space at the same time. An MMORPG is the role-playing version, where you build up a character over months or years. This guide explains what the term means, how these games work under the hood, and whether one is right for you.
What does MMO mean?
MMO stands for “massively multiplayer online.” Many people search for “massive multiplayer online,” but the accepted term is “massively.” MMOs is simply the plural, so the meaning of MMOs is “massively multiplayer online games.”
Add “RPG” and you get MMORPG, or massively multiplayer online role-playing game. That is the genre most people mean when they say MMO: World of Warcraft, Final Fantasy XIV, EverQuest, Old School RuneScape.
What separates an MMO from other multiplayer games is persistence. A match of Fortnite ends, and the map resets. An MMO world keeps running when you log off. The auction house keeps trading, other players keep questing, and your character is waiting exactly where you left it.
A short history of MMOs
The roots go back to text games. MUD1, created by Roy Trubshaw and Richard Bartle at the University of Essex in 1978, let multiple people explore a shared text world.
Graphical MMOs took off in the late 1990s. Meridian 59 launched in 1996, Ultima Online in 1997, and EverQuest in 1999. Ultima Online’s Richard Garriott is widely credited with popularizing the term MMORPG.
World of Warcraft arrived in 2004 and turned the genre mainstream. In October 2010 Blizzard announced it had passed 12 million subscribers, a peak no Western MMO has publicly matched since.
How MMORPGs work: the 5 core systems
Almost every MMORPG is built on the same five systems. Learn these and you can pick up any new game quickly.
1. A persistent shared world
The game runs on servers that never pause. Most games split players across several servers, sometimes called realms, worlds or shards. EVE Online is the famous exception: nearly everyone plays on a single server called Tranquility.
2. Character progression
You pick a class, such as a warrior, mage or healer, then level up by questing and fighting. Once you reach the level cap, progression shifts to better gear, harder content and new abilities.
3. Group content
The hardest content needs a team. Most games use the “holy trinity” of roles:
- Tank: holds enemy attention and absorbs damage
- Healer: keeps the group alive
- DPS: deals the damage
Dungeons usually take about five players. Raids take far more. Icecrown Citadel, the final raid of Wrath of the Lich King, was built for groups of 10 or 25.
4. A player-driven economy
Players gather, craft and trade with each other. Prices on the auction house rise and fall with supply and demand. Old School RuneScape’s Grand Exchange and EVE Online’s markets are real economies that players study seriously.
5. Social structures
Guilds, called corporations in EVE and free companies in FFXIV, are the social core of an MMO. They organize raids, share resources and, honestly, keep you playing long after the content gets repetitive.
Types of MMO games
“MMO” covers more than fantasy role-playing. These are the main types you will see:
| Type | What you do | Examples |
|---|---|---|
| MMORPG | Level a character, quest, raid | World of Warcraft, FFXIV |
| Sandbox MMO | Shape the world through trade and conflict | EVE Online, Albion Online |
| MMOFPS | Large-scale shooter battles | PlanetSide 2 |
| Action MMO | Fast combat, fewer menus | Lost Ark, Black Desert |
There is also a looser “MMO-lite” category. Destiny 2 and Diablo IV put you in shared spaces with other players but keep most content small-group or solo. If you mainly care about Diablo 4 builds and solo grinding, that hybrid style may suit you better than a full MMORPG.
How MMOs make money
Your cost depends on the business model:
- Subscription: World of Warcraft costs $14.99 a month in the US. Final Fantasy XIV starts at $12.99 for its Entry plan.
- Buy to play: You buy the game, and a subscription is optional. Guild Wars 2 and The Elder Scrolls Online work this way.
- Free to play: The game is free, funded by cosmetics and convenience items. Lost Ark and the free tier of Old School RuneScape are examples.
Heads up
Subscription prices differ by region and change over time. Check the official store before you commit to a multi-month plan.
Cosmetics are a big part of every model. The FF14 glamour system, which lets you change your gear’s appearance without losing its stats, is a good example of how much players care about looking the part.
Is an MMO right for you?
MMOs reward patience. Expect your first character to take dozens of hours to reach endgame, and expect that endgame to last years.
They suit you if you like long-term goals, enjoy cooperating with strangers, and want a game you can return to for years. If you only have short sessions or dislike scheduling around other people, a smaller online RPG will probably frustrate you less.
The best way to start is with a game that has a healthy population. Our list of the most played MMOs is a good place to check, and if you plan to play with friends, look at our picks for multiplayer games built around group play.
Veteran's tip
Join a guild in your first week, even a casual one. Players who stay solo are the ones who quit at the level cap.
FAQ
What is the difference between an MMO and an MMORPG?
MMO is the broad category of massively multiplayer online games. MMORPG is the role-playing subgenre, focused on character progression, classes and quests. Every MMORPG is an MMO, but not every MMO is an RPG.
Is Fortnite an MMO?
No. Fortnite and other battle royales hold up to 100 players per match, but each match ends and resets. MMOs need a persistent world that continues without you.
Can you play MMOs solo?
Yes, for most of the leveling journey. Modern MMORPGs like FFXIV and World of Warcraft let you reach the level cap mostly alone. Raids and top-end content still require a group.
What is a good first MMO for beginners?
Final Fantasy XIV is a strong pick because its free trial covers the base game and its first three expansions, up to level 80. Guild Wars 2 is another easy start, since its core game is free.
