Mario Brothers (Atari 2600)

Mario Brothers is a 1983 platforming game released on the Atari 2600.

Classic Game Room
Mark notes that it is the first "Mario" game, and the first game with Luigi. He also notes that the game isn't as well known as Super Mario Bros, and that even with it's rudimentary graphics, it is still a great game, and you can still see his mustache. He also says he wishes it could be remade for Xbox Live Arcade.