1. Wii sports
2. Wii play
3. Wii fit
4. wii sports resort
5. Mario kart wii
6. Wii fit +
7. New super mario bros. wii
8. Modern warfare 2
9. GTA4
10. COD5
In no particular order though as I don't know the sales out of my head. And that's not even taking handheld games into consideration AND I SHOULD.