2-in-1 Super Mario Bros. / Duck Hunt

Super Mario Bros./Duck Hunt was a best-selling NES cartridge combining the games Super Mario Bros. and Duck Hunt. The player would select which game to play on the first menu. It was a best selling game, largely due to the fact that it was packaged with the NES Action Set. That package also included the Zapper Light Gun for Duck Hunt. This game was developed and published by Nintendo and was was released in November 1988.

In December 1988, another combination pak was packaged with the NES Power Set. This compilation was titled 3-in-1 Super Mario Bros./Duck Hunt/World Class Track Meet and included the Power Pad for World Class Track Meet.

Super Mario Bros.
Super Mario Bros. is the top-selling Mario game—and the top-selling video game—of all time due to the fact that it was packaged with nearly every NES system made. You play as Mario and Luigi on their adventure to save Princess Toadstool from the evil King Bowser.

Duck Hunt
Duck Hunt is a game for the NES and one of several games that required the Zapper Gun. You and your trusty dog go hunting for ducks and try to shoot them after the dog chases them out using as few bullets as possible (your are allowed 3 tries per duck). An alternate game setting is Clay Pigeon, where you shoot at clay pigeons, but it is different from real life because you dont yell "pull" (as it's a video game), they just fire and you shoot them while the discs fly out of launcher off-screen.