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Given the nature of this site?
"Roleplaying" could be a useful tag to mark questions about the "acting in character" part of gaming, as in the distinction roleplaying vs. combat. There might be a better tag for that, though.
I should think so, yes. It seems to me that a site entirely about roleplaying games wouldn't need either tag. :) Retag at will.
"Games" has no purpose and should go. (or "rpg"). Everything here should fit that tag.