ARDefender has been out for a couple of months but surprisingly it's fallen under the radar of a lot of iPhone users. Combining augmented reality technology with a basic aim-and-shoot, ARDefender allows you to transform your physical desktop or office floor into a battleground. It costs just a buck and it's a great way to both have fun and to showcase the iPhone's [1] ability to integrate with the world around it.
To use the game, print out a special PDF template on any printer, trim to size, and place it on any flat surface. As you aim your device's camera at the the template, tanks and planes start zooming around your virtual world. The template becomes a 3-D tower, so you don't actually see
