Im glad people are mentioning great DC games like Grandia 2 and skies of arcadia, but there are some that are very good no one has mentioned, these are:
1. D2 (short game, but very good)
2. Sonic adventure
3. Sonic adventure 2
Sonic adventure one and two are very different from each other. some love the first and hate the second, others (like me) like the second but hate the first. D2 is such a good game, the boss batlesin it are very original in designe, they add real mood to the game. I think Ill stop blasting my opinions at you and let someone else post now.