MMORPG

The most popular type of Massively multiplayer online game (MMO), and the sub-genre that pioneered the category, is the massively multiplayer online role-playing game (MMORPG), which descended from university mainframe computer MUD and adventure games such as Rogue and Dungeon on the PDP-10. These games pre-date the commercial gaming industry and the Internet, but still featured persistent worlds and other elements of MMOGs still used today.