Scrap'em: Alien Invasion Defense Attack strategy is a fun-packed 3D tower defense game full of action. The players must be braced to defend the Earth from waves of alien invaders. The game is catered toward a single-player audience and includes multiple levels played across three different maps. The goal of the game is to defend the Research Facility Centre from the alien that is marching onto the field, and you need to chop them to bits by placing defensive towers along their route. In this game, the players are challenged to rethink their strategies and employ different towers to complete the mission. A super-fun combination of defense and invasion strategy game.