"Super Mario Galaxy (スーパーマリオギャラクシー) is a 3D platform game developed by Nintendo EAD Tokyo and published by Nintendo for the Wii. It was released in Japan on November 1, 2007, the United States on November 12, 2007, Canada on November 14, 2007, Europe on November 16, 2007, Australia on November 27, 2007, South Africa on February 1, 2008 and South Korea on September 4, 2008. It is the third 3D platformer in the Mario series, after Super Mario 64 and Super Mario Sunshine.
The game follows the protagonist, Mario, on a quest to rescue Princess Peach from the game's primary antagonist, Bowser. Levels are galaxies filled with minor planets and worlds, while gameplay is updated with gravity effects and new power-ups.
Super Mario Galaxy was first shown at E3 2006 and enjoyed a high level of pre-release awareness. The game has been hailed by several gaming websites as one of the best video games of all time and has won a BAFTA. GameRankings lists the game as the second best reviewed game of all time and is the best reviewed Wii game ever. The game is the 8th best selling Wii game worldwide ever with sales of over eight million."
Source: Wikipedia, "Super_Mario_Galaxy," available under the CC-BY-SA License.