Super Mario All-Stars is a collection of previously released Super Mario NES platform games. Each title is presented with its original gameplay and level design but has been given a makeover in the graphics and sound department. A save option has been added allowing players to store the session data.
Included in Super Mario All-Stars are the following games:
Super Mario Bros.: Mario and Luigi must rescue the Princess and the Mushroom Retainers from the evil King Bowser.
Super Mario Bros.: The Lost Levels: known as Super Mario Bros. 2 in Japan, this game features the same style of gameplay as the original Super Mario Bros. The game contains poison mushrooms, which will shrink or kill Mario, and new and old enemies, such as Flying Bloopers.
Super Mario Bros. 2: also known as Super Mario USA in Japan, Mario and friends discover a mysterious land, called Subcon, that is being destroyed by Wart and his minions. They must rescue this strange land from the tyrant.
Super Mario Bros. 3: Bowser, with the help of his Koopalings, takes over the Mushroom Kingdom's 7 lands and turns their kings into creatures. It's now up to Mario and Luigi to save the Mushroom Kingdom
The Super Mario 2 game wasn't intended to be a Mario game at all. It originates from the Japanese game "Doki Doki Panic", which was reworked by Nintendo (they changed some sprites and screens) and released in USA as "Super Mario Bros. 2". In Japan, there is another SMB2 - which is called "Super Mario Bros. - Lost Levels" in this cartridge, which is a REALLY hard version of SMB1.