Hello Ananda,

Unfortunately, Steam still rates The Nanny as a "Profile Features Limited" game, which means it doesn't have enough visibility/sales to have all of Steam's features enabled. And one of those features is the ability to appear in the Perfect Games section.

You can check if a game has limited features on its page's info column.

Sorry for the inconvenience.

Oh, no inconvenience at all! I was only wondering. It's a pity, though, such a good game, I'd love for it to appear on my perfect games as I really liked the playing experience. Thank you for your time.