I created the first one in the technical support forum and figured there are not many people to read it there, so I created it here again.
Thats not exactly my use case. I am a big fan of local coop, so I added a custom entry with numbers of Players for all my games and created playlists for 2 players, 3 players etc.
Now when we are e.g. three people and we go through my library and someone says I want to play a racing game, I want to filter my library easily by all racing games that are playable with three players.
I guess I could view all racing games first and then filter by numbers of players, but I would have to do that for every time we switch the genre, which is quite inconvenient too.
Do you have a different idea how to do that?