In this unique form of flight simulation and stealth infiltration game YOU are the alien in control of alien space vehicles and technology that makes human weapons look like puny toys. Then again, those humans have a lot of toys to throw up against you. Not only that, but they will absorb your alien technology to adapt and improve their own each time you fail. If that weren't enough, you're not the only aliens on Earth. Your rival, embedded deep below Earth, have made the move to subsume humanity by taking over their greatest source of power, their leaders.