There are plenty of tower defense games for the Android platform.
Tower defense is a video game genre with tactical and strategy elements. Briefly, it means that a player must defend his ally structures using battle units and powerful towers. Gameplay is based on tower management, upgrades and hiring a large group of troops to defend a base or castle. Players struggle against numerous waves of monsters and creeps.
There are a lot of addictive tower defense game applications on Android. You can discover different types of games including standard, labyrinth, arcade, linear, nonlinear, and tower offense when a player tries to breakthrough enemy structures.