Save the Island is a very challenging new strategy game from Ajani Infotech. It is a remake of the classic PC web game and really puts your mind to work. You play the part of a tribal warlord in this game where you fight off intruders. The game is really easy to pick up and put down once you get the hang of it. Its hard to describe how the gameplay works but the screenshots in App World walk you through the tutorial.
You can pick up Save the Island free in App World for OS 4.6+ BlackBerry smartphones.