It's one of my favorite games. I'll admit, though, that it's an acquired taste. It didn't do to hot salewise. But it's definitely unique. It's definitely worth a playthrough.
You play a man who killed someone in a restaurant bathroom and doesn't know why. You also play as the two cops persuing him. The characters in this game are particularly strong, IMO.
Edit: I'm talking about Indigo Prophecy, obviously...answering a question from above.