There's an entire sidequest that ends at the library which 'never even made it to alpha' according to Bloodlines writer Brian Mitsoda and had to be created essentially whole cloth, with writing that doesn't match the rest of the game.
It puts a cop in the tutorial you can talk your way past to learn how the dialogue skills work, and his voice acting is pretty rough. Some of the things the plus patch restores are questionable, I'll admit.
