There's a new tag, new-delta-green. Since what's new is relative to now and now keeps changing, that's obviously not a good long-term tag. I'm having a hard time deciding on a replacement though.
So the situation is that the new Delta Green is a full-fledge roleplaying game. The old Delta Green is a line of setting supplements for Call of Cthulhu.
In considering the different ways we disambiguate tags, none of them strike me as sufficiently self-explanatory and “good tagging practice” to be obviously the way to go, leaving me unwilling to just mod-change them unilaterally. The ways I thought of are:
delta-green/delta-green-setting (changing both). This would give primacy to the RPG itself, but these wouldn't get used right: [dg] would keep getting used for both, and [dg-setting] would also get used for both.
delta-green-rpg/delta-green-coc* (changing both). This is clear enough and they likely wouldn't get used wrong, but it's not called “Delta Green RPG” so that rubs me the wrong way. But maybe it's the best of the lot?
(* Notably, delta-green-call-of-cthulhu fits in our tag limit. It might be worth considering instead of delta-green-coc, but it looks to me like the CoC part might overwhelm the DG part. On the other hand, perhaps it should — to emphasise that old DG is a sub-topic of CoC, we might consider call-of-cthulhu-delta-green?)
How should we tag Delta Green the RPG and Delta Green the Call of Cthulhu setting supplement line?