Sonic Generations (PC)
Beaten Seaside Hill (Sonic Heroes) with both Sonics, getting all Red Rings. Also beaten more Challenges so that I can unlock the next Boss level. Moreover, I have also beaten Shadow in a Rival Battle, which took me a while to figure out.
This game is longer than I thought, no doubt due to how some of the Red Rings are in inconvenient locations. In fact, Red Rings are the main reason I got several Game Overs, since this game will deduct a life if you choose to Start Over a stage (it won't deduct if you exit and re-enter, but that's inconvenient).
Thank you for reading.