Super Mario Galaxy

Super Mario Galaxy continues the main Mario series on the Nintendo Wii. Unlike previous games in the Mario series, which were set in the Mushroom Kingdom or surrounding lands, Super Mario Galaxy is set in outer space, across several different galaxies. It is the first main series Mario game that allows two players to play simultaneously through the main game, in the Co-Star Mode.

Shortly after Mario is invited to the Star Festival, a celebration of the comet that passes over the Mushroom Kingdom every hundred years, Bowser invades with a surprise attack in a fleet of airships. Summoning a giant UFO, he rips Princess Peach's entire castle from its foundations and lifts it into outer space. After an unsuccessful rescue attempt, Mario is catapulted across the cosmos and awakens on a small planet. There he meets a mysterious woman called Rosalina and her companion stars, the Lumas.

Rosalina is a watcher of the stars, who uses her mobile Observatory to travel across the universe. However, the Power Stars that act as the Observatory's power source have all been stolen by Bowser, rendering it immobile. Bestowed with the power to travel through space, Mario sets off on an intergalactic adventure across the universe to reclaim the Power Stars and restore power to Rosalina's observatory.