Dead Rising 2: Case Zero is kind of difficult to judge. While it is a standalone title, it's not really a full game per se. It is, essentially, DLC for a game that hasn't been released yet, an extension of Dead Rising 2. Of course, no one has had that experience yet, meaning that Case Zero serves double duty as a demo as well. It's an interesting experiment for Capcom and for the industry in general; thankfully for Dead Rising fans, it pays off.