and which letter stands for persistent world in the MMO…
Umm what? And which letter in RTS stands for controlling your troops with mouse? None, but it’s the norm for the genre.
World of Warcaft, MMORPG. If we take all the RPG elements away (levels, experience, story, quests etc. etc.) what we will have left in our hand? A persistent world, with basically nothing in it as we took them away (RPG elements).
Planetside 2, MMOFPS. If we take all the FPS elements away from, what will be left? Again a persistent (empty) world.
What do those 2 have same in their genre? MMO -part. What is actually same in the games itself? Persistent world and support for hundreds of players in the same place.
If we do the same to Star Conflict, what we’ll have in our hands? A Chat.
RTS games have had build in lobby’s with chats for multiplayer since forever, yet they don’t claim to be MMO’s. For a reason.
If one really wants to take the abbreviation MMO literally, word by word. Lets go and do that.
First M - “massively”. Is 12vs.12 massive? Well not really, so it’s not a MMO then.
Oh the game shows how many people are online & playing? Well many games do that, Company of Heroes for example, yet it isn’t MMO. Even steam shows players playing and adds a chat to games, wouldn’t that make Skyrim or Far Cry 3 an MMO then?
So you say Vindictus, Rusty Hearts, C9, GW 1/2 and every other instanced based mmorpg is not even an mmo.
How i’m saying that? GW 1 & 2 got persistent worlds, GW1’s is heavily instanced and not open, but it’s there. You can have hundreds of players in the same ‘spamadan’ instance with you. GW2 is only instanced for PvP/Raids and got open world, so i don’t know why you got that in your example list of instanced games. I’ve never played or heard about the first 3, so cannot really comment on them.
But when it comes to GW1, many people say it is not mmorpg because it’s so heavily instanced and not open. But a online/multiplayer RPG instead. Go and create a thread about that in mmorpg forums (for example) and you’ll be getting about 50-50 yes and no answers. When you do that to World of Tanks (or Star Conflict) you’ll be getting no’s for majority of your answers.
edit;
One could also go by wiki definition (yes, anyone could troll edit those to be what ever they want, but the wiki definition has be as it is like forever).
A massively multiplayer online game (also called MMO and MMOG)
Comparison to other games
There are a number of factors shared by most MMOGs that make them different from other types of games. MMOGs create a persistent universe where the game milieu continues regardless of interaction
…
Most MMOGs also share other characteristics that make them different from other multiplayer online games. MMOGs host a large number of players in a single game world, and all of those players can interact with each other at any given time.
…
To support all those players, MMOGs need large-scale game worlds, and servers to connect players to those worlds. Some games have all of their servers connected so all players are connected in a shared universe. Others have copies of their starting game world put on different servers, called “shards”, for a sharded universe. Shards got their name from Ultima Online, where in the story, the shards of Mondain’s gem created the duplicate worlds.
Still others will only use one part of the universe at any time. For example, Tribes (which is not an MMOG) comes with a number of large maps, which are played in rotation (one at a time). In contrast, the similar title PlanetSide allows all map-like areas of the game to be reached via flying, driving, or teleporting.
This game is really closer to Battlefield or Counter-Strike (not MMO games) than to Planetside or GW2 (MMO games).
edit2:
Definition on thefreedictionary:
Massively multiplayer online game
A massively multiplayer online game (also called MMO ) is a multiplayer video game 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.