I'm a sucker for a good game that takes place in medieval times and love tower defense, so Medival for the BlackBerry PlayBook is obviously one that pulled me in. This action/arcade title is a simple castle defense game where you use various tools in your arsenal to break down the enemy defenses. Use catapults, archers and more as you defend your castle against the enemy onslaught through various levels.
Medieval has been around on other platforms for quite a while and now happily marches on to the BlackBerry PlayBook as well. You can pick it up now in BlackBerry App World for $3.99.