10,000 years ago a spaceship landed on our mother Earth. Aliens started spreading to different continents exploring our magnificent cultures. They started digging mines, collecting cash and creating their underground EMPIRES, wanna join them? Start building your underground EMPIRE by collecting cash with the aliens and hiring managers to supervise and automate the mine digging while you expand your empire vertically and horizontally. BOOST your performance whenever you can so nothing can stop you. But remember, you have to start by Africa then Asia followed by Europe then you have North America and finalize by South America. Create your own underground empire by digging mines in those continents and enjoy every culture vibes as you move across the continents. Don't forget to use the "SUPER cash" to boost your cash, performance and GO BIGGER!