Command and Conquer 3 : Tiberium Wars (PC Game)

In 2047, Tiberium has blanketed the Earth, which is now divided into zones based on the level of Tiberium infestation. Pristine Blue Zones represent 20% of the planet's surface and are the last refuge of the civilized world. Partially habitable Yellow Zones make up 50% of the planet's surface; most of the world's population lives in these war-torn and ecologically ravaged areas. The remaining 30% of the planet is uninhabitable, a Tiberium wasteland swept by violent Ion Storms. Red Zones are like the surface of an Alien planet.

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.