Super Mario Bros. 2, later released in Japan as Super Mario USA (スーパーマリオUSA?), is a 1988 platform game developed and
published by Nintendo 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.
Super Mario Bros. 2 initially started out as a demo for a vertically scrolling, two-player, cooperative-action game that
was scrapped. The reasons included the technical limitations of the NES hardware making it difficult to produce a
polished game featuring a vertical orientation and multiplayer features conceived for the project. It was decided to add
more Mario-like elements, such as horizontal levels (though many vertically oriented levels were retained in the final
project). Since the game had gone through some development, Nintendo created the game Yume Kōjō: Doki Doki Panic for the
Family Computer Disk System during its agreement with the Fuji Television company. The game was changed in order to fit
with the theme of the mascots of the company and their adventure.
After Nintendo of America had concluded that the Japanese version of Super Mario Bros. 2 was too difficult, Nintendo
redeveloped Yume Kōjō: Doki Doki Panic into Super Mario Bros. 2 for the international market outside of Japan. The
game became a commercial success, and eventually the game became well received enough that it was also released in Japan