I completed the first one and never played it again, just seemed to repetitive, so I never bought the second one when it came out but my mum bought me it for Christmas and it was fuckin' brilliant. I've completed Brotherhood aswell but somehow it's not as good as the second, the gameplay aye, but the story feels a bit light, you see Rodrigo Borgia (a character central to the whole plot) 3 times at most in the game. The Assassins Order though is a nice touch.