There should be no games in Other Games that do not have the console name in the item name.
That being said, I would really like to know what is actually on these discs, if they are actually locked to the Polymega console or not. If they can only be played natively on the Polymega, then a Games category can be made, but if they can play on a computer with some form of Linux OS then they would not, and an argument could be made for them to exist in a PC games category.
As far as the console and the accessories, they are no different than other consoles that can accept multiple games, such as the Retron 5.
I guess it all depends on the discs.