LittleBigPlanet
It's hard to find a starting point when the subject you're discussing is of such vast brilliance as LittleBigPlanet. It's been broken down into three simple words - Play, Create, Share. And that about sums it up nicely, but at the same time, doesn't really scratch the surface at all. In short, LittleBigPlanet is like nothing you've experience thus far. It's simple and straight forward one moment, and absurdly complex the next. But all the while, it remains brilliant and fun.