New Super Mario Bros. U has several important distinctions. For one thing, it's the first Mario game in years that's launched alongside a new Nintendo console. Perhaps even more importantly, it's the first Mario game ever to appear in HD. As if that wasn't enough, the level design is excellent, the multiplayer is great, the Miiverse integration adds another layer to the experience, and the overworld design hasn't been this good since Super Mario World. If you have a Wii U, you need to have New Super Mario Bros. U.
New Super Mario Bros. U (2012)