While we don't get many of them we do have a couple of popular questions and tags where there is a bit of overlap between the game continuity and related anime and manga spin-offs.
One popular and notable one in particular is pokemon.
While they have commonalities, each series has it's distinct type of distinction, such as it's story and worldbuilding. In my opinion, these the game continuity should be seperate from the anime and manga continuities. This can alleviate some of the ambiguity on questions that ask about the worlds specific questions.
In that regard, I would like to propose changing the current pokemon tag into a pokemon-series franchise tag, have the game related questions tagged as pokemon-game, the anime with as their respective series name: pokemon-anime, pokemon-generations, pokemon-origins, etc. The same with the manga: pokemon-adventures, pokemon-electric-boogaloo, pokemon-reburst, etc.
These tags will be added on an as needed basis. While it does cause a bit of fragmentation, bu we can start applying the prefix schema idea suggested by senshin to keeping things consistent, while maintaining distiction between anime/manga and games.
For popular franchises, we should look at updating and maintaining the franchise tag's tag wikis to include the all the currently series tags within the franchise for better recordkeeping.
What does the community think about such a change?