New Tags

[Patient Zero*]

There's a few I've come across while going through the list, something like "Reused Content" would be common, and some sort tags to cover music, like when two games use the same track, or even when they use an unrelated or famous piece of music and we give the details on the title and composer of the piece.
Although I have no idea what you would call that in this tagging scheme.

Oh, possibly "Unreleased Game" or "Banned Game" would be useful too, always good trivia about why games were unreleased or banned in certain regions.