Super Mario Bros. is a platform game developed and published by Nintendo in late 1985 for the Nintendo Entertainment System. Super Mario Bros. featured gameplay that changed the way video games were created. It is the first console original in this genre to feature smooth-scrolling levels, which made it a landmark in home video-gaming.
Super Mario Bros. sports a "hero must save damsel in distress" storyline. The hero Mario, an Italian plumber, must save Princess Toadstool of the Mushroom Kingdom from the evil King Koopa. Mario is aided in his quest by his brother Luigi in two-player mode. In order to save Princess Toadstool, the Mario Bros. must conquer the eight worlds that comprise the Mushroom Kingdom. Mario (or Luigi) must make his way to the castle in each world and defeat one of the King's evil minions, thereby taking control of that world. In order to reach the castle, however, Mario or Luigi must battle through three "sub-worlds" by either destroying or avoiding King Koopa's henchmen. If Mario or Luigi successfully fights his way through the castle and defeats the evil minion, a Mushroom Retainer (later called Toad), is freed. Inside the eighth castle, the Mario Bros. will find Princess Toadstool.
Super Mario Bros. is the best selling video game of all time, and was largely responsible for the initial success of the Nintendo Entertainment System, as well as ending the two year slump of video game sales in the United States after the video game crash of 1983. It has inspired countless imitators, two direct sequels, and many spinoffs, as well as an entire video game series, and was one of Shigeru Miyamoto's most influential early successes. The game starred the Italian plumber Mario and his brother Luigi. Mario went on to become Nintendo's most well known mascot.