Super Mario Galaxy

Super Mario Galaxy is a pretty different game, to me anyway. You are on a little "planet" (as Mario) walking around trying to unlock other galaxies and to help save Princess Peach's castle, because it was taken from where it was on Earth. The game keeps going and going, but in each little galaxy, there are a bunch of different levels. You can also eventually unlock Luigi in this game, and you can unlock a few other options too. Very fun and time consuming game.