An MMORPG, otherwise known as a Massive Multi-Player
  Online Role Playing game, in other words - Online RPG, is a
  genre of online computer role playing games (CRPG) where
  considerable amounts of players cooperate with each other in a virtual world
  (basically, in a fantasy setting). Like the majority of RPG's,
  the role of an invented hero is given a possibility to operate its actions by
  the player who created it. MMORPG's differ from one user and
  small network role playing games set by players in the virtual realm, which
  continues to exist whether you are logged on or not. The virtual world is
  supported by the publisher of game.
In the virtual world, players can carry out various actions that interact
  with one another. There are also characters in the game that are operated by
the  server called Non Player Characters (NPC's), that include hostile or
aggressive  monsters. These are called mobs. When a player is engaged in combat
with the  world's inhabitants and successfully destroys them, they are then
rewarded with  compensation and experience points. The player then can use their
received  experience points to perfect the skills and abilities of the hero by
using the  gold coins (the game currency and/or valuable items) that makes up
the basis of  the economy between the participants of the game. In many
MMORPG's, players have the ability to form alliances in game
  with other members that have a variety of associations, such as guilds and/or
  clans which allow players to adhere to a certain policy in regards to other
  players' orginazations. With some games a player can either decide to remain
  neutral or choose the more chaotic and destructive path upon creating their
  characters and have the option to choose either or with their arrival into the
  realm - depending on a game's plot or by the players choice. There are other
MMORPG's that require players to pay a fee to their publishers in order
  to get a users subscription and to obtain a copy of their game.
Darkswords is a completely free MMORPG
  (Massive Multy-Player Online RPG) that can be downloaded and played
  without having to pay any hidden fees or subscriptions.
Players who like MUD (Multi-User Dimension) like DarkSwords too,
  because we are close to their favorite games.