Your mission in this strategy battle game is to survive and destroy the alien invasion. Build units and evolve your base to destroy the enemy base before they have enough resources to build a stronger army than you. Be sure to train enough gatherers which will collect money for your army. If you have enough money you can build defensive towers or offensive units. If you gain enough XP points you will be able to advance to the next era and build even more powerful units. Use YOUR MOUSE to control the game. Use ARROW KEYS to scroll the screen and press SPACEBAR to select your base. Good luck!