King's Castle has been besieged by the army that wants to invade their only unconquered territory. Protect the castle from relentless enemy attacks with your sharp shooting skills.
Prepare for the battle to protect your base and complete your Lone Ops by taking down enemy troops. Upgrade your artillery and special attacks as needed.
Fight against humanoid military forces through 6 different worlds, command allied troops armed with powerful lasers and destructive rays, upgrade your weapons, unlock electric mines and homing missiles and destroy everything in your path.