If a question is asked that is about a total conversion mod (The Specialists mod for Half-Life) OR DLC (Bioshock Infinite: Beyond the Sea DLC has nothing to do with the first storyline from what I can tell.) where the gameplay changes drastically and the content is strictly of the dota nature or of the call-of-duty-ghosts-extinction where Extinction is in the base game but is a completely separate issue from Squads and Multiplayer or the campaign (see halo-3-odst) then I personally would tag it/create a tag for the separate issue.
How do I protect the helicopter from being destroyed at the first hive fight in Extinction?
This particular question with call-of-duty-ghosts doesn't really fit the bill, as while yes it is a base game mode, it would be nice to see the call-of-duty-ghosts-extinction. It will have a different scheme than
How do I make Riley attack?
This question would be beneficial from an edit to make it coincide with the mode.
However if, say there was a command and conquer mod for call of duty ghosts:
How do I force my roving band of rileys to attack a ghost squad?
THIS question would most definitely benefit from the [tag:call-of-duty-ghosts-command-&-conquer] because it has absolutely nothing to do with the multiplayer or the campaign or the extinction mode, thus it would require a mod tag.
I think we should have the expanded tags. It further allows the sorting of questions as they arise. With my limited understand of tagging, I think if the tag benefits the question to get certain expertise on the subject at hand then we should tag questions with the expanded tags.