You are the x-morph - an alien species that invades Earth to harvest its resources and Terraform the surface. Strategize in the build Mode by carefully selecting various types of alien towers or throw yourself right into the heat of the battle. Build mazes for incoming enemies in an environment that provides exceptional planning freedom. Tear down buildings and collapse bridges to support your defence or to simply indulge in a spectacle of unprecedented destruction. Possess a range of unique alien weapons and use defence strategies as you've never seen before in this genre.