I’ve never actually dug that deeply into what’s really rare on NES but I know enough to know that it’s pretty much like any system you’d collect for. There’s what I like to think of as pop rares, games that are widely held up to the casual collector as the rare games of the System. NES these are your Samsons and Panic Restaurants and Ducktales 2s. These games aren’t necessarily the scarcest games on the system but they all could be considered very uncommon to rare by most collectors. Then there’s the actual scarcest games on a system which like 9 times out of 10 is gonna be some crappy sports title or something that is rare because no ones ever cared about it except for people who care that no ones ever cared.