Super Mario Galaxy

Super Mario Galaxy is set in outer space,^[3][4] where Mario travels through different galaxies to collect Power Stars, earned by completing missions, defeating a boss, or reaching a particular area.^[3][5] Each galaxy contains planetoids and orbiting structures for the player to explore.^[3] Each astronomical object has its own gravitational force, allowing the player to completely circumnavigate the planetoids, walking sideways or upside down.^[6][7] The player can usually jump from one independent object and fall towards another one nearby. Although the main gameplay is in 3D, there are several areas in the game in which the player's movements are restricted to a two-dimensional plane.^[8]

The game's main hub is the Comet Observatory, a spaceship which contains six domes that provide access to most of the game's 42 available galaxies, with each dome except one holding five.^[5] Five domes end with a boss level in which the objective is to defeat Bowser or Bowser Jr. and earn a special Power Star, known as a Grand Star, that gives the player access to the next dome.^[5] The player only has access to one galaxy when they begin the game; as more Power Stars are collected, more galaxies and Stars become available. The player is awarded the ability to play as Luigi after collecting 120 Power Stars as Mario. Once 120 Power Stars are collected with both characters, the player is rewarded with one additional challenge. Completing this challenge grants the player the 121st star and a commemorative picture that can be sent to the Wii Message Board.

Used game, which means it may show some slight traces of wear. The photo is for illustration purposes only. Tested