A 3D platformer and first Wii entry in the Super Mario franchise, Super Mario Galaxy sees Mario jump across planets and galaxies with varying items, enemies, geographies and gravity mechanics in order to reach his enemy Bowser, who has attacked the Mushroom Kingdom and hijacked Princess Peach's castle with her inside.

Every hundred years, a huge comet flies by in the skies above the Mushroom Kingdom. One year, that comet filled the entire sky, and from it fell a stream of shooting stars. The Toads scooped up the Star Bits and brought them to the castle, where they were reborn as a great Power Star. It was a happy time in the Mushroom Kingdom. Then one night Mario received a letter...

“Dear Mario,

I’ll be waiting for you at the castle on the night of the Star Festival. There’s something I’d like to give you.

from Peach”

With invitation in hand, Mario headed off to the castle just as the Star Festival was getting into full swing. Surrounded by Toads gleefully trying to catch falling Star Bits, Mario was looking forward to the night’s festivities. But then, something happened...