Super Mario Bros. is a 1985 platform video game developed by Nintendo, published for the Nintendo Entertainment System as a pseudo-sequel to the 1983 game Mario Bros. It is the first of the Super Mario series of games. In Super Mario Bros., the player controls Mario and in a two-player game, a second player controls Mario's brother Luigi as he travels through the Mushroom Kingdom in order to rescue Princess Toadstool from the antagonist Bowser.
The success of Super Mario Bros. has caused it to be ported to almost every one of Nintendo's major gaming consoles. Nintendo released special red variants of the Wii and Nintendo DSi XL consoles in re-packaged, Mario-themed, limited edition bundles in late 2010 as part of the 25th anniversary of the game's release. In 2005, IGN's poll named it as The Greatest Game Of All Time.
Source: Wikipedia