The so-called "Year of Luigi" continues this June with the release of New Super Mario Bros. U's downloadable expansion, New Super Luigi U. The massive bit of content completely revamps the core game with all-new levels and playable characters, and a sharp increase in difficulty. New Super Luigi U is basically an entirely new game for a fraction of the price, and will definitely test your mettle every step of the way. Fortunately, it's still a lot of fun to play, which goes a long way in easing tensions caused by frustration.
New Super Luigi U
Luigi will finally be getting his due later this year when Nintendo releases a massive downloadable content update for New Super Mario Bros. U.