The Federation is under attack and doesn't seem to be holding its ground very well. It is up to you and your Mechwarrior to put an end to their advancing armies.
After a successful teleport, our hero ends up on the basement level of AS7 medical research facility. He finds new challenges and evidence of resistance, but still no survivors. The only ones alive are the undead.
Defend the tower as aliens are in full force of attack. Upgradable. Destroy as many aliens as possible and earn more credits to purchase/upgrade equipments.