A massively multiplayer online game (MMOG or MMO) is an online game which is capable of supporting large numbers of players simultaneously in the same instance (or world). MMOs usually have at least one persistent world, however some games differ. These games can be found for most network-capable platforms, including the personal computer, video game console, or smartphones and other mobile devices.

A massively multiplayer online game (MMOG or MMO) is an online game which is capable of supporting large numbers of players simultaneously in the same instance (or world). MMOs usually have at least one persistent world, however some games differ. These games can be found for most network-capable platforms, including the personal computer, video game console, or smartphones and other mobile devices.