6. New Super Mario Bros. Wii (30.79 million)
And Nintendo obviously released a version of their classic platform game for their last-generation Wii console, as owners of the Wii got to play with the famous Italian plumber in 2009’s New Super Mario Bros. The game was as successful as previous entries in the series, as it sold almost 31 million copies. Part of its success was probably due to Nintendo’s inclusion of a multiplayer mode, as competing with friends to reach the end of levels frequently became a viciously competitive struggle.