Super Mario Galaxy plus Super Mario Galaxy 2 bundles both gravity-defying 3D platformers together, letting players experience Mario's original galaxy-hopping adventure alongside its direct sequel. Both games center on navigating small, spherical planetoids in space, using shifting gravity to reach Power Stars scattered across each galaxy.

The sequel expands on the first with new galaxies, power-ups, and the addition of Yoshi as a companion. Together, the pair offers a substantial look at one of the more inventive stretches of 3D Mario platforming.