Released: 2007
Developer/Publisher: Nintendo EAD Tokyo for Nintendo
Platform(s): Wii

The first Mario game developed for the Wii literally blasts you into space to explore 42 galaxies filled with hundreds of planets, each with their own eco-system, enemies, and gravity. Its innovative physics system gives you the ability to jump between and fully circumvent the spherical 3D planets. Hands down the best Wii game ever.

Super Mario Galaxy 2 is currently being developed for a 2010 release.