There's a lot of Nintendo games in there...
25. GTA: Vice City – 20 million
24. Super Mario World – 20.6 million
23. Wii Fit Plus – 21.03 million
22. Wii Fit – 22.67 million
21. Pokémon Gold and Silver – 23 million
20. Mario Kart DS – 23.56 million
19. Pokémon Red, Blue, and Green – 23.64 million
18. Nintendogs – 23.94 million
17. Kinect Adventures! – 24 million
16. Call of Duty: Black Ops II – 24.2 million
15. Grand Theft Auto IV – 25 million
14. Call of Duty: Black Ops – 26.2 million
13. Call of Duty: Modern Warfare 3 – 26.5 million
12. Grand Theft Auto: San Andreas – 27.5 million
11. New Super Mario Bros. Wii – 27.88 million
10. Wii Play – 28.02 million
9. Call of Duty: Modern Warfare 2 – 28.5 million
8. New Super Mario Bros. – 30.75 million
7. Wii Sports Resort – 32.58 million
6. Grand Theft Auto V – 34 million
5. Mario Kart Wii – 35.53 million
4. Super Mario Bros. – 40.24 million
3. Minecraft – 54 million
2. Wii Sports – 82.54 million
1. Tetris – 143 million
