A "Massively Multiplayer Gaming Service". Often known inaccurately as an "MMORPG", or "Massively Multiplayer Online Role Playing Game". The new term of MMGS is a more concise and accurate term to refer to this style of computer gaming.
Use of the term "online" in the inaccurate "MMORPG" is unnecessary, as it is impossible to have a massively multiplayer game that is not online. The "RPG" tag is also inaccurate in most instances, as several new MMGSs are not, in fact, role playing games- by design. Also, in those games that exist that are role playing games, very few players actually choose to role play.
The new term is more accurate with the addition of the "GS", for "Gaming Service". This clarifies one point of confusion for those who don't have the development knowledge to differentiate between game types. Some games that are considered by casual players to be of the MMGS genre are in fact not Massively Multiplayer Online Gaming Services- Guild Wars is a prime example. Guild Wars is a multiplayer game with massively multiplayer virtual game lobbies (the towns). The reason the game does not cost a monthly fee, as all gaming services do, is due to the massive design differences inherent in creation of an MMGS vs. an OCG (online computer game). Any true MMGS requires a monthly fee to offset development and production costs.
"Guild Wars is a fun OCG, but the most often played MMGS is Blizzard's World of Warcraft."