I have Adventure DX and Heroes for PC and Shadow, Adventure 2 Battle and Riders for GameCube. Unfortunately I can't look up my Adventure DX and Heroes stats, because I am in England, Middlesbrough now (I lived in Germany before) since 2 Months and am studying Computer Games Design here and don't have My Adventure DX and Heroes CDs with me. I've played Adventure DX for about 150 hours and have all emblems. In Sonic Heroes, unfortunately the timer doesn't go above 99:59:59 hours, but I am pretty sure that I must have played that game near to or even more than 300 hours. I got all A-ranks and have finished Super Hard Mode and also tried to make some relatively good records in most missions.
Unfortunately, I also can't look up my times for my GameCube games, because my GameCube is destroyed! I only had a GameCube for about 5 months. I always wished I was able to finish at least Shadow and Adventure 2 Battle (with all A-ranks and stuff) but I was not able to do that and it still hurts whenever I think about it, because I LOVE those two Games! In Shadow, I managed to get about 60 A-ranks and get all Keys in 15 Levels. In Adventure 2, I got over 40 A-ranks and two Chaos around level 30 in everything. I actually HATE, HATE, HAAAAAAAAATE raising Chaos, but if you want all emblems, you are forced to raise them! >.< I sure waisted a lot of time in the Adventure games with those stupid Chaos! I mean, they are cute, but it is VERY boring to raise them and VERY frustrating to race with them! >.< In Riders, I got 35 gold medals and unlocked Sega Carnival.
Now, Sonic Rush, my absolute favorite! I got all S-ranks since some monthes now and made some quite good time records in all levels. In the moment I am trying to do some very good ring records, but it will still take quite a long time until I'm finished with this. I must have played this game over 100 hours already, but actually, I have no idea.