What's your favorite 4?

[Smeags]

1. Sonic & Knuckles (I mean... one could argue that it's part of Sonic the Hedgehog 3, which it is. But it's also a separate game that takes place after Sonic 3. I just don't know! )
2. Super Mario Galaxy 2 (The fourth 3D Mario game.)
3. Super Mario World (The fourth 2D Mario game.)