Super Mario Bros. 2, released in Japan as Super Mario USA (Japanese: スーパーマリオUSA, Sūpā Mario USA), is a 1988 platform game developed and published by Nintendo for the Nintendo Entertainment System. The game was first released in North America on October 9, 1988. Super Mario Bros. 2 has been remade or re-released for several video game consoles.
The game that became Super Mario Bros. 2 started out as a prototype for a vertically scrolling, two-player, cooperative-action game, but later was re-branded into Yume Kōjō: Doki Doki Panic, a Family Computer Disk System game meant to tie-in with Fuji Television’s media technology expo, called Yume Kōjō (lit. Dream Factory). The characters, enemies, and themes of the game were meant to reflect the mascots and theme of the festival. After Nintendo of America found the Japanese Super Mario Bros. 2 too difficult and similar to its predecessor, Yume Kōjō: Doki Doki Panic was improved upon and converted back into a Super Mario Bros. sequel for release outside Japan.