Massively multiplayer online game

A massively multiplayer online game (also called MMOG or simply MMO) is a video game which is capable of supporting hundreds or thousands of players simultaneously. By necessity, they are played on the Internet, and feature at least one persistent world. They are, however, not necessarily games played on general purpose computers; most of the newer game consoles (Xbox 360, PSP, PS3, Wii, DS, etc.) can access the internet, and thus can have MMO genre games. MMOGs can enable players to cooperate and compete with each other on a grand scale, and sometimes to interact meaningfully with people around the world. They include a variety of gameplay types, representing many video game genres. Many MMOGs require players to invest large amounts of their time into the game. Most MMOGs require a monthly subscription fee, but some can be played for free. The most popular type of MMO, and the sub-genre that pioneered the category, is the massively multiplayer online role-playing game (MMORPG),... full article at wikipedia