Mario Bros. is a platform game developed and published for arcades by Nintendo in 1983. It was designed by Shigeru Miyamoto and his coworker and Nintendo’s chief engineer Gunpei Yokoi. Italian-American plumber Mario and his brother Luigi exterminate creatures emerging from the sewers by flipping them on their backs and kicking them away.

Mario Bros. features two plumbers, Mario and Luigi, having to investigate the sewers of New York after strange creatures have been appearing down there. The objective of the game is to defeat all of the enemies in each phase. The mechanics of Mario Bros. involve only running and jumping. Unlike future Mario games, players cannot jump on enemies and squash them, unless they were already turned on their back. Each phase is a series of platforms with pipes at each corner of the screen, along with an object called a "POW" block in the center. Phases use wraparound, meaning that enemies and players that go off to one side will reappear on the opposite side.