Wikipedia currently lists 2448 games, and there've even been some new games released in recent years for the classic Mac OS.

https://en.wikipedia.org/wiki/List_of_Macintosh_games

Wikipedia currently lists 571 games, and I would be surprised if that's all of them. (Especially with new homebrews still being made.)

https://en.wikipedia.org/wiki/List_of_Apple_II_games

These are already in the database.

Grey Zapper:

https://www.pricecharting.com/offer/q6kks7ime7bpilcw2dfhr34dei

Orange Zapper:

https://www.pricecharting.com/offer/3n2pbumjkkiy7umqph6qhz5k3q

This is a glaring hole in the PriceCharting database and absolutely should be added.

I would suggest a single "Mac Games" category to complement the "PC Games" category. Since the latter doesn't differentiate between DOS and Windows games, for example, the former shouldn't need to differentiate between, say, classic Mac OS and Mac OS X games.