Sometimes, a game is just better the second time you play through it. Whether it is because you know the big reveal from near the end of the game that puts everything else which happened before into a different context, or you know everything that's going to happen and the anticipation of it all makes it better, or the game was so epic that replaying it is bliss, or there is an awesome New Game+ mode that eclipses the original New Game mode, sometimes first isn't better.

So, what are your "second's better" games, and what makes them better upon a subsequent playthrough?