MotorStorm. Evolution released a decent offroad racer, the likes of which had been made many times before, and it crossed 3 million sold. Then there was an unpleasant surprise in MotorStorm 2. Same with Resistance, although Resistance 2 also sold very well.
Gears of War. It was a new IP, and yet it sold massive amounts, even on the 360's then-tiny userbase. Microsoft must have expected it to sell well, but to cross 5 million...
I won't name anything on Wii, because EVERYBODY will name those 







