Hello, I extracted NES games from the Classic Games 500 in 1 (https://bootleggames.fandom.com/wiki/Classic_Games_500-in-1). Some of the games worked properly, while others did not. For the games that did not work, I downloaded replacement versions from the internet for some of them only, and then modified those games so they match the appearance and behavior of the games included in the original 500-in-1 Classic collection.