Scoobes on 29 March 2013
So based on that:
| Title | Sold | Platform(s) | No. Of titles | Average per title | |
| 1 | Halo | 37.36 | X360 | 5 | 7.472 |
| 2 | Mario Kart | 33.55 | Wii | 1 | 33.55 |
| 3 | New Super Mario Bros | 28.38 | Wii/WiiU | 2 | 14.19 |
| 4 | Gran Turismo | 24.3 | PS3/PS2 | 3 | 8.1 |
| 5 | Gears of War | 18.4 | X360 | 3 | 6.13 |
| 6 | Super Mario Galaxy | 17.77 | Wii | 2 | 8.89 |
| 7 | God of War | 17.09 | PS2/Ps3 | 8 | *2.14 |
| 8 | Uncharted | 16.43 | PS3 | 3 | 5.48 |
| 9 | Forza | 15.51 | X360/XB | 5 | 3.10 |
| 10 | Zelda | 10.39 | Wii | 2 | 5.2 |
*Questionable value due to remakes and Ascension (just released)
I don't know how representative the average is for the likes of God of War and Halo as they've both had remakes (quite a few in the case of God of War) and Ascension has only just come out (same for Gears and Judgement). Either way, an interesting way to look at it and would skew the table in Nintendo's favor if you arrange by "Average sales per title"
Edit: Fixed values for Forza and Gears
Edit 2- Fixed to be in line with changes from OP
