Defend your base! Use your magnetic ship to pick up chunks of junk and drop them on advancing enemies. Absorb junk into your ship and base to upgrade them and assure your victory.
Build towers and survive through 51 hardcore waves of aliens that heal themselves, haste other enemies, split into more enemies and freeze your towers.
Keep your base safe from the huge advancing army using your trusty sniper rifle, air strikes and artillery. With each wave the invading army gets stronger, spend your money on the right upgrades and try to survive the war!