Really? Super Mario Galaxy isn't a Killer App? 8.5 million units sold is certainly pretty awesome, and almost sits itself in the top 50 best-selling games ever. That is within the top 0.5%.
And what about New Super Mario Bros. Wii? That game has sold 15.2 million units worldwide, sitting at #29 (I believe), and is not even close to finished selling. And it does have a degree in difficulty--that game is tough as nails. Even the people at gamrReview and IGN say that.
And lastly, what about Mario Kart Wii? over 22.5 million units sold. Sits itself as one of only 12 games to sell that well...all the rest of them, incidentally, also made by Nintendo. And it also has a degree in difficulty. Are you going to tell me that the 150cc CPUs in the game were easy? Sure, it wasn't the hardest game ever, but it wasn't easy, either.
