Towers vs Aliens

Earth is under attack by a coalition of alien powers. Can you build an outpost that will withstand assault until reinforcements can arrive? Towers vs Aliens is a base building game with tower defence elements, but set on the vertical plane. Your enemies are unpredictable and different tactics will be required depending on which of their craft they use and upgrade. Choose from 15+ different block types to battle three distinct alien commanders and their forces. Im planning to continue adding to t...