What tag should be used for Massively Multiplayer Online Games?
Options that come to mind:
Most common? Combined with rpg for games that are both.
Also common. In contrast to tagging both mmo and rpg.
More verbose suggestion. It has been pointed out that although recognisable and in the spirit of minimising abbreviations, it is technically incorrect - as one could have a massively-multiplayer game that was not online.
More correct. [Removed as the g is basically implied.]
To me, having the tag be [massively-multiplayer] makes it too unwieldy. As such, I was thinking something similar to Arda Xi's comment:
MMO for any massively multiplayer game
Second Genre-Specific Tag based on the genre of the game
So it would look something like this:
Planetside would have two tags: MMO and FPS
WoW would have two tags: MMO and RPG
This would allow people to find games in each of the sub-genres of MMO by searching for that genre's tag (i.e. Planetside is findable under FPS and WoW is findable under RPG). The search is easily configurable enough to allow someone to easily find MMORPGS by including [mmo] [rpg] in their search. To me, the benefits overwhelm the costs.
Since not all massively-multiplayer games are RPGs, then I'd say:
MMORPG for massively-multiplayer RPGs
I suggest massively-multiplayer for massively-multiplayer games that aren't RPGs, though MMO is also nice.
MMOG is a bit redundant since this is a gaming site :) and anyway I think MMO is more common.
Now, it's true that there are some terms such as MMORTS and MMOFPS lying around, and they may even be pretty accurate for describing some games, but I'm not sure they are well-known enough to warrant their own tag.
While I usually prefer things written out to abbreviations, I strongly recommend MMO to the alternatives. In fact, I'd go so far as to say MMORPG is wrong.
While we often refer to games as being MMORPGs, they are in fact both an MMO and a RPG. These are two different genre which should both be tagged. If I want to look for RPGs I should see games which are both MMO and not.
I think both tags have their relevance. I posted a question asking for a game and tagged it MMO because I didn't care if it was an RPG. So the tag MMORPG would not have accurately described my question but would definitely be more appropriate for something like: "Games similar to WoW?"
I personally like the idea of splitting the MMO away from RPG, FPS and so on for the reasons Michael Herold and tzenes mentioned. But I think things would work just as well without that split up.
Edit: The tag "massively-multiplayer" is too verbose IMO. Nobody calls it that unless they have to explain their hobby to some outsider.
I went through and tagged all the [world-of-warcraft] questions to follow the tagging scheme Michael Herold suggested ([mmo] and [rpg]), but alexanderpas has changed them to [mmorpg]. There doesn't seem to be a way to message users to talk to them, so posting here I guess.