Mario Bros. is a title for the Game & Watch. Despite its name, it has no similarity to the popular arcade game Mario Bros. Instead of plumbing, Mario and Luigi are working at a bottling factory and must prepare packages of bottles to load onto a delivery truck. This is the first game to feature Luigi.
The game is played on the Multi Screen model of the Game & Watch and was released on March 14, 1983. The model opened like a book and could allow for simultaneous two-player action, with one player controlling Luigi on the left half of the game and the other playing as Mario on the right, making it the very first Mario game to have two-player mode.