MMO

An MMO refers to a massively multiplayer online videogame (also called MMOG) 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, etc.) can access the Internet, and thus can have MMO genre games.

MMOs 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 videogame genres. Many MMOs require players to invest large amounts of their time into the game. Most MMOs require a monthly subscription fee, but some can be played for free.

{{Wikipedia:Massively multiplayer online game]]