Portal -> Portal still alive.
Even if it is damn short, it is pure fun and gameplay.
I also played Gears of War 2 campaign two times in a row .
Castle crashers has a lot of replayability to me for the same reason as Portal.
Evan Wells (Uncharted 2): I think the differences that you see between any two games has much more to do with the developer than whether it’s on the Xbox or PS3.