March, 2047. A massive nuclear fireball explodes high in the night sky, marking the dramatic beginning to the Third Tiberium War. The infamous Kane has returned to lead the Brotherhood of Nod in a massive global assault on the Global Defense Initiative and the few remaining Blue zones left on the planet. Only you can stop him. The fate of humanity – and the planet – is in your hands.
Can you define "lower tier defense's"?
Watch Tower
Guardian Cannon
AA (maybe)
And all NOD and Scrin equivalent.
Thank you