I've sorted some more, and along with ccoa, there are about 20% of the examples left to place in a genre. Several of them probably fall under Other.
Naturally, there are also plenty that fall under several genres. All games don't fall into neat categories. That probably needs checking so they're under the best fitting folder.
I'm pondering splitting off Metroidvania titles to their own genre, since the gameplay involved there does have a significant impact on how you get 100% completion.