My favourite PS2 game.
It includes a love story, and in the middle of the game you have to decide if follow the girl or fight for your ideals.
And both stories really touched my heart.
Besides that, some great dramatic tracks on the soundtrack, very likeable characters, a beautiful world, good gameplay (especially when you start to customize it) and the most beautiful girl I've seen on a videogame (Ridley).
Although all of that can be only my personal taste, but it's an excellent game.
I'm still waiting for the sequel that will never arrive.