Tower defense is hardly a new genre, especially on mobile platforms. For those unfamiliar with the idea behind tower defense, it generally follows a relatively simple formula: a player is given a base (or bases) to defend from oncoming waves of enemies. For every enemy that the player defeats, they are awarded some form of resource, usually money, which can then be used to buy more units to defend your base from larger waves of enemies. The genre is one of the more stressful and challenging ones, attracting tactical gamers and stress junkies alike. We checked out Sentinel 4: Dark Star, the fou
