What game did you last play?!?!?!?

Kirby's Epic Yarn, Sonic 4, and Sonic Rivals.
 
Sonic the Hedgehog 4. It was a real pain, but I finally managed to complete the remaining Special Stages and unlock Super Sonic. I've unlocked almost all of the game's achievements, and I only have four more to go.
 
Angry Birds for Mac.