Prototype defense android game free download

Description:
Head an orbital defense of our planet and defend the world from the attacks of aggressive aliens. Build defensive towers, space stations, and so on. Show your strategic talent in this exciting game for Android. Your task is to build orbital platforms and place a variety of automatic weapons on them. Combine different structural elements and create unique defensive platforms. Enemies can attack your from any direction, so try to create an impregnable defense, placing turrets everywhere.

Features:

More than 13 levels
2 endless levels
More than 20 types of enemies
32 types of towers