If anyone else can, that is...
1. Sonic the Hedgehog 2
2. Sonic Adventure 2/Battle (tied)
3. Sonic Colors (Wii)
4. Sonic Generations (360/PS3)
5. Sonic Unleashed (360/PS3)
6. Sonic & Knuckles
7. Sonic the Hedgehog 3
8. Sonic Adventure/DX (tied)
9. Sonic Advance
10. Sonic the Hedgehog (360/PS3)
11. Sonic Advance 3
12. Sonic the Hedgehog (Genesis)
13. Sonic Colors (DS)
14. Sonic Generations (3DS)
15. Sonic and the Secret Rings
16. Sonic CD
17. Sonic the Hedgehog 4: Episode I
18. Sonic Triple Trouble
19. Sonic 3D Blast
20. Sonic Rush
21. Sonic Rush Adventure
22. Sonic Battle
23. Sonic Blast
24. Sonic Chaos
25. Sonic Chronicles: The Dark Brotherhood
26. Sonic the Hedgehog 2 (Game Gear)
27. Sonic the Hedgehog (Game Gear)
28. Sonic Riders
29. Sonic Free Riders
30. Shadow the Hedgehog
31. Sonic Heroes
32. Sonic R
33. Sonic Shuffle
34. Tails' Adventures
35. Sonic and the Black Knight
36. Sonic Unleashed (Wii)
37. Sonic Riders: Zero Gravity
38. Sonic Labyrinth
39. Sonic the Fighters
40. Sonic Advance 2
41. Sonic Rivals
42. Sonic Rivals 2
43. Sonic Drift 2
44. Sonic Drift
45. Tails' Skypatrol
46. Sonic Spinball (Genesis)
47. Sonic Spinball (Game Gear)
48. Dr. Robotnik's Mean Bean Machine (Genesis)
49. Dr. Robotnik's Mean Bean Machine (Game Gear)
1. Sonic the Hedgehog 2
2. Sonic Adventure 2/Battle (tied)
3. Sonic Colors (Wii)
4. Sonic Generations (360/PS3)
5. Sonic Unleashed (360/PS3)
6. Sonic & Knuckles
7. Sonic the Hedgehog 3
8. Sonic Adventure/DX (tied)
9. Sonic Advance
10. Sonic the Hedgehog (360/PS3)
11. Sonic Advance 3
12. Sonic the Hedgehog (Genesis)
13. Sonic Colors (DS)
14. Sonic Generations (3DS)
15. Sonic and the Secret Rings
16. Sonic CD
17. Sonic the Hedgehog 4: Episode I
18. Sonic Triple Trouble
19. Sonic 3D Blast
20. Sonic Rush
21. Sonic Rush Adventure
22. Sonic Battle
23. Sonic Blast
24. Sonic Chaos
25. Sonic Chronicles: The Dark Brotherhood
26. Sonic the Hedgehog 2 (Game Gear)
27. Sonic the Hedgehog (Game Gear)
28. Sonic Riders
29. Sonic Free Riders
30. Shadow the Hedgehog
31. Sonic Heroes
32. Sonic R
33. Sonic Shuffle
34. Tails' Adventures
35. Sonic and the Black Knight
36. Sonic Unleashed (Wii)
37. Sonic Riders: Zero Gravity
38. Sonic Labyrinth
39. Sonic the Fighters
40. Sonic Advance 2
41. Sonic Rivals
42. Sonic Rivals 2
43. Sonic Drift 2
44. Sonic Drift
45. Tails' Skypatrol
46. Sonic Spinball (Genesis)
47. Sonic Spinball (Game Gear)
48. Dr. Robotnik's Mean Bean Machine (Genesis)
49. Dr. Robotnik's Mean Bean Machine (Game Gear)