Command & Conquer 3: Tiberium Wars

For the first time in the series you can play as a third faction, an alien race known as the Scrin Faction. The Scrin have invaded Earth, seeking to harvest all the Tiberium and destroy anything that gets in their way. They don't seem intent on anihalating the Earth...yet.  The game plays in real time, incorporating a large strategy element. You must gather resources and convert them into buildings or units to destroy your enemies. Will you create a large mob of weaker units, or save your money to create uber powerful war machines? The game features a strong online element, with integrated clan support and versus/co-op battles. The game even rewards you for your own unique play style.