In Mario Bros. the objective is to rid the sewers of pests such as turtles, crabs and flies. The player controls one of the Mario Bros., Mario or Luigi, and has their character jump up and strike the platform one of the pests is on from below, flipping the pest over. The character can also jump up and hit the POW box, flipping over all pests on the screen at once. The player then has their character kick any flipped pests into the water below, then repeat the process until the level is clear.
Mario Bros. can be played by a single player or by two players simultaneously. In a two player game the players can choose to cooperate or compete with each other.
Mario Bros. was designed by Shigeru Miyamoto and Gunpei Yokoi and produced by Nintendo in 1983.