Your castle is under attack and you must protect against goblins, orcs and other creatures in this Tower defense game. Start with only 3 towers, and level them up to increase their attack power, or upgrade them to give them new skills. As the waves increase, the monsters get tougher and tougher until the boss monster comes to try and tear your castle down. As the waves increase you unlock more types of towers to unleash upon the enemy. Strategically place your towers to combat all that the enemy forces will throw against you, and save your castle from certain doom.