Mario Bros. was released on July 18, 1983 by Nintendo who also developed the game. Mario Bros. Mario Bros. is a side-scroller platform game.

Mario and Luigi, having to investigate the sewers of New York after strange creatures have been appearing down there. The goal is to defeat all the enemies on the level.

The brothers can run an jump.They can jump on an enemy only if it’s already on its 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 wraparound which takes some time to get used to.

Enemies are defeated by kicking them over once they have been flipped on their back. This is done by hitting the platform the enemy is on directly beneath them.

If the player takes too much time to do this, the enemy will flip itself back over, changing in color and increasing speed. Each phase has a certain number of enemies, with the final enemy immediately changing color and increasing its speed.

There are 4 different types of enemies in the game, the shellcreeper, the sidestepper, the fighter fly and slipice.

The game supports 2 players taking turns.

The game uses a Z80 CPU and it also has an Intel 8039. 256×244 RGB graphics.