I was more thinking about the characters in the game.
Viewing post in POC tag?
Ahh. But, "has poc in it" as the meaning of a tag... I see problems there. Who would tag this, and with "poc" no less? You usually tag the hero's attributes, if any. With lgbt you imply that the hero will be engaged in this type of activity or be heavily confronted with it (or it is a game withoud a hero, but deals with that topic).
"has only poc in it" might have some information value, but "has poc in it" has not much information, as you could tag most games with it, that have people in it.
But the bottom line is, race is not tagged in gaming. Not the hero's, nor the npcs. A recent AAA title comes to mind, Forspoken. Look at the tagging of the game on Steam. For that matter try finding any race related tag on Steam. Any at all. They are the big player, and if they do not have any, the chances of such a tag becoming popular is slim.
If this is about adult games, you might try the tags used by adult movies. Some do use those tags, but not many.