uper Mario Galaxy is a 2007 platform action-adventure video game developed and published by Nintendo for the Wii, and the third 3D game in the Super Mario series. As Mario or Luigi, the player embarks on a quest to rescue Princess Peach, save the universe from Bowser, and collect 121 Power Stars. The levels in the game consist of galaxies filled with minor planets and worlds, with different variations of gravity, the central element of gameplay. The player character is controlled using the Wii Remote and Nunchuk, and completes missions, fights bosses, and reaches certain areas to collect Power Stars. Certain levels use the motion-based Wii Remote functions.

Super Mario Galaxy was a critical and commercial success, hailed as one of the greatest video games of all time. At the time of its closure in 2019, Super Mario Galaxy was the highest-rated game of all time on review-aggregating site GameRankings. It received universal acclaim from critics, who praised the game's visuals, gravity mechanics, soundtrack, and setting. It won several awards from gaming publications, including multiple "Game of the Year" titles, and became the first Nintendo title to win the British Academy Games Award for Best Game. The game is the ninth bestselling Wii game worldwide with sales of 12.80 million.