New Super Luigi U is an expansion for New Super Mario Bros. U . It replaces Mario with Luigi as Player 1, with Blue Toad, Yellow Toad, Nabbit and Mii as playable characters. Luigi has his own abilities, higher jump and lower traction, to help him in the redesigned levels that now have increased in difficulty and start at one hundred seconds. While the levels have a major makeover, the World Map itself remains unchanged.
The retail version of the game is a standalone release that doesn't require New Super Mario Bros. U to play.
Gameplay involves navigating Luigi through increasingly challenging levels, with an emphasis on precision and timing. Players can choose from multiple playable characters, each with their own unique abilities and strengths. The game also features a variety of power-ups and collectibles, which can be used to unlock special items and rewards.