Massively multiplayer online game

A massively multiplayer online game (MMOG) is a type of computer game that enables hundreds or thousands of players to simultaneously interact in a game world they are connected to via the Internet. Typically this kind of game is played in an online, multiplayer-only persistent world. Some MMOGs are played on a mobile device (usually a phone) and are thus Mobile MMOG or MMMOG or 3MOG.



The first and most popular type of MMOG is the massively multiplayer online role-playing game (MMORPG) genre that became popular in the late 1990s. The more general concept emerged as more non-RPG massively multiplayer games were developed later.

Despite the genre's focus on multiplayer gaming, AI-controlled characters are still common. NPCs and mobs who give out quests or serve as opponents are typical mostly in MMORPGs. AI-controlled characters are not as common in action-based MMOGs.

The popularity of MMOGs is mostly restricted to the computer game market. Online games have not yet gained huge audiences on console game systems. Nevertheless, there have been several console MMOGs, including EverQuest Online Adventures (PlayStation 2), and the multiplatform Final Fantasy XI (PC and PS2).

Compared to other computer games

There are a number of factors shared by most MMOGs that make them different from other types of computer games. MMOGs create a persistent universe where the game continues playing regardless of whether or not anyone else is. Since these games strongly or exclusively emphasize multiplayer gameplay, few of them have any significant single-player aspects or client-side artificial intelligence. As a result, players cannot "beat" MMOGs in the typical sense of single-player games. Some MMOGs, such as Star Sonata, do have an end condition that includes awarding a "winner" based on a player's standing in the game at the finale.

Most MMOGs also share characteristics that make them different from other multiplayer online games. MMOGs host a large number of players in a single game world where all those players can interact. Popular MMOGs might have thousands of players online at any given time usually exclusively on a company owned server. Non-MMOs, such as Battlefield 1942 or Half-Life ususally have less than 50 players online and are usually played on private servers. Also, MMOs usually do not have any significant mods since the game must work on company servers. There is some debate if a high head-count is the requirement to be a MMO. Some say that it is the size of the game world and its capability to support a large number of players that should matter. For example, despite technology and content constraints, most MMOGs can fit up to a few thousand players on a single game server at a time.

To support all those players, MMOGs need large-scale game worlds. In MMOGs, large areas of the game are interconnected within the game such that a player can traverse vast distances without having to switch servers manually. For example, Tribes comes with a number of large maps a server plays in rotation (one at a time), but in the MMOG PlanetSide all map-like areas of the game are accessible via flying, driving, or teleporting.

There are few more common differences between MMOGs and other online games. Most MMOGs charge the player a monthly fee to have access to the exclusive servers. The game state in a MMOG rarely resets; what the player earned yesterday is with them still today. MMOGs often feature in-game support for clans and guilds, such as the ability to manage an association with in-game tools.

The boundaries between multiplayer online games and MMOGs are not always clear or obvious. Neverwinter Nights (2002) and Diablo II are usually called online role-playing games (RPGs) but are also sometimes called MMORPGs (a type of MMOG). Guild Wars has been called an MMORPG, but most of its gameplay involves small groups of players in private areas. That game's developer prefers the term "competitive online role-playing game".

Types of MMOGs

Missing image
Shattered Galaxy has been one of the few MMORTS games.

There are several types of massively multiplayer online games.


Massive multiplayer online role-playing games, known as MMORPGs, are perhaps the most famous type of MMOG. See MMORPG and list of MMORPGs for more information.


Several MMO first-person shooters have been made. These games provide large-scale, team-based combat. The addition of persistence in the game world means that these games add elements typically found in RPGs, such as experience points. The first MMOFPS was probably 10SIX, released in 2000. Other popular MMOFPS games include World War II Online and PlanetSide. See massively multiplayer online first-person shooter for more information.


A number of developers have attempted to bring real-time strategy games into the MMOG fray. Some notable MMORTS games include Mankind and Shattered Galaxy. See massively multiplayer online real-time strategy for more information.


Most other MMOs are apparently simulation games, such as Motor City Online, The Sims Online (though this is often called an MMORPG), Ace of Angels, and Jumpgate. There are also games like Second Life and There that derive from the tradition of MUSHes, emphasizing socializing and world-building.

In April 2004, the United States Army announced that it is developing a massively multiplayer training simulation called AWE (asymmetric warfare environment) that was expected to begin operation among soldiers by June. The purpose of AWE is to train soldiers for urban warfare and there are no plans for a public commercial release. Forterra Systems Inc. is developing it for the Army based on the There engine. [1] (

Alternate reality games (ARGs) can be massively multiplayer, allowing thousands of players worldwide to co-operate in puzzle trails and mystery solving. ARGs take place in a unique mixture of online and real-world play that usually does not involve a persistent world, and are not necessarily multiplayer, making them different from MMOGs.


Missing image
Fantasy MMORPGs (such as RuneScape seen here) were the first type of massively multiplayer game.

The first type of MMOG was the MMORPG. MMORPGs themselves trace their roots to MUDs, BBS games, and browser-based games. As computer game developers applied MMO ideas to other computer and video game genres, new acronyms started to develop, such as MMORTS. MMOG emerged as a generic term to cover this growing class of games. These games became so popular that a magazine, called Massive Online Gaming, released an issue in October 2002 hoping to cover MMOG topics exclusively, but it never released its second issue.

The massively multiplayer market has always been dominated by successful fantasy MMORPGs such as Lineage, EverQuest, and World of Warcraft.

fr:Jeu en ligne massivement multijoueur

  • Art and Cultures
    • Art (
    • Architecture (
    • Cultures (
    • Music (
    • Musical Instruments (
  • Biographies (
  • Clipart (
  • Geography (
    • Countries of the World (
    • Maps (
    • Flags (
    • Continents (
  • History (
    • Ancient Civilizations (
    • Industrial Revolution (
    • Middle Ages (
    • Prehistory (
    • Renaissance (
    • Timelines (
    • United States (
    • Wars (
    • World History (
  • Human Body (
  • Mathematics (
  • Reference (
  • Science (
    • Animals (
    • Aviation (
    • Dinosaurs (
    • Earth (
    • Inventions (
    • Physical Science (
    • Plants (
    • Scientists (
  • Social Studies (
    • Anthropology (
    • Economics (
    • Government (
    • Religion (
    • Holidays (
  • Space and Astronomy
    • Solar System (
    • Planets (
  • Sports (
  • Timelines (
  • Weather (
  • US States (


  • Home Page (
  • Contact Us (

  • Clip Art (
Personal tools