Imagine how it would have been back in medieval times when it was all about protecting Kings, Queens, their castles, and ultimately the kingdom. Here’s a collection of apps that are dedicated to castle defense games; each of these are addictive, challenging, and filled with all kinds of cool elements. You’ll love the graphics, the storylines, and the social aspects that many of them feature. The hardest part will be picking just one or two to download, so why not try the whole list?