There have been many debates about the merits of both PlayStation Move and Microsoft Kinect ever since they were both unveiled. And when it came to the Time Crisis franchise, Namco weighed up those merits and decided that they couldn't work with Kinect.
"One of the reasons [for it being PlayStation 3 exclusive] was it's easier to play this type of game with an accessory than it is with Kinect." said Norihiro Nishimura the producer on Time Crisis: Razing Storm when we caught up with him at GamesCom 2010.
That's not to say they won't work with Microsoft's Kinect on other products in the future though.