New Super Mario Bros.
is a 2D side-scrolling platform video game developed and published in 2012 by Nintendo as a launch game for the Wii U. It is the fourth in the "New Super Mario Bros." series. It is a sequel to "New Super Mario Bros. Wii" (2009) and a follow-up to "New Super Mario Bros. 2" (2012). As part of the "Year of Luigi" campaign, a downloadable expansion to the game, "New Super Luigi U", was released in June 2013. A standalone retail version was released the following month and later copies of the base game included the expansion on disc. This is the first "Mario" game to be released in high-definition graphics.