At long last humanity has fully realized the dream of art lovers throughout history: to enter a classical landscape painting and kill people. The control scheme is innovative and takes a little getting used to, but once you have the knack, you will be delighted by the ease with which you can run across rooftops and hop from one narrow beam to another. To get the most gameplay, visit all the view points and do all the research missions for each assassination. Now that my skills are finely honed, I'll probably try to replay it again sometime before GTA IV.
Score: 46 out of 52
Downsides: too many flags to collect, not enough side targets to assassinate; the last 90 minutes or so pretty much throw the stealth option out the window (I actually enjoyed playing stealthily in AC); only one save game slot