We currently have: multi-player, two-players, extra-players, and player-number. These tags have 6-11 questions per at present. Two of them have no wikis, and the wiki for multi-player says "more than two players", which is not the definition of "multi" I am familiar with.
What should we do with these tags?
Nuke them all.
They add nothing, in my opinion (besides opportunities for people to go tagging everything in sight).
For me, nearly any tag that groups multiple unrelated games together is probably a meta-tag, and we shouldn't use it.
I can only see one valid use for multi-player. That would be with mtg. The rules differ in some respects, and the answers differ too when offering advice about about a duel deck versus a multi-player deck. As for a tag, mtg-free-for-all would be better.
I suppose in most situations, the OP could/would specify the environment that the deck is being played in. We only have 3 or so mtg-ffa questions right now anyway.
I think we should merge all of these into player-number and write a wiki for it. This tag should almost always be accompanied by a game-specific tag. (The exception there would be questions of the form "what games work well for seven players?".)
Nobody would ever search for extra-players without also searching for a specific game (what does it mean in isolation?), so searching for game + player-number works just as well. All non-solitaire games are multi-player, so that tag isn't particularly meaningful. As for two-player, why distinguish that if we don't distinguish one-player and other specific numbers of players? What's special about two?
