black box NES games

[ganonbanned]

on digitpress i have heard some of the NES games called blackbox games. some of them were wrecking crew, mario bros, duckhunt, donkey kong, and gyromite. what is a blackbox game?

 

[crazygoat]

my guess is that the box is black with a picture in game on the front i just sold a gyromite complete and it was blackbox also i know mariobros and duckhunt is the same