Darkwatch PS2 - Shooter game where the story has 2 outcomes. With out giving too much away the main character is cursed and can either finish as a vampire or human. Good/evil type deal. You can play as both throughout the game. I always thought it was very underrated, not many people talked about it. I've beat it a few times but never did go the good way. I just can't help it at the end...
More recently I fell in love with Costune Quest! Tim's great creation! Love it!
My favourite Playstation games would have to be from back when I was a kid, it made me become a better gamer for it hardness, I have two choices because they were equally enjoying to play.
first one: Rascal
second one: Heart of Darkness
This is my unknown favorite