Super Mario Bros. 2, often abbreviated SMB2 and also known as Super Mario 2, is a platform game developed and published byNintendo for the Nintendo Entertainment System as a sequel to the 1985 game Super Mario Bros. The game was also remade as part of the Super Mario All-Stars collection for the Super Nintendo Entertainment System (SNES), released on August 1, 1993 in North America and December 16, 1993 in Europe. It was rereleased on the Wii's Virtual Console in Europe, Australia and New Zealand on May 25, 2007 and the U.S. on July 2, 2007.
Unlike the majority of other Mario titles, Super Mario Bros. 2 was not developed from the ground up. Rather, it is a redesign of the Japanese Family Computer Disk System game "Yume Kōjō: Doki Doki Panikku" (夢工場 ドキドキパニック, lit. "Dream Factory: Heart-Pounding Panic"). Nintendo's original sequel to Super Mario Bros. was released in Japan as Super Mario Bros. 2 in 1986; however, because of that game's difficulty and its close similarities to the original game, Nintendo decided not to release it in the West at that time. Because Super Mario Bros. 2 is a redesign of a non-Mario game, the game differs greatly from the original Super Mario Bros., though many elements from the game have since become part of the Mario series canon. The redesigned Western version of Super Mario Bros. 2was released in Japan in 1992 under the title Super Mario USA (スーパーマリオUSA Sūpā Mario Yū Esu Ē?), and in 1993 a 16-bit remake of the original Japanese version was released to the rest of the world as Super Mario Bros.: The Lost Levels as part of Super Mario All-Stars.