Destroy the enemy base while defending yours. You can build turrets to defend your base and units to attack the enemy's. The twist of the game is that you can evolve as well as unlock new units and defense means.
In the far future, Earth is destroyed by decades of war for resources. The survivors build huge motherships and depart for a journey to the stars, yet the human learn that they are not alone as they encounter the dreadful..
Your unit has been deployed at a rural location in Vietnam. Fight the local guerillas to secure the nearby airbase and hold it as long as you can. Be vigilant!
Drop bombs with your helicopter to wreak havoc on enemy grounds while sending out troops and vehicles to take control of enemy bases. See tutorial for hotkeys.