Monsters are attacking! You must defend everything you know and love with every resource at your disposal. Your disposal currently includes arches, mages, ninjas, dragons, and even poison spells. Use your mouse to place these resources along the path in order to best and quickly defeat the monsters currently running their way through the path. Place your various units, and as they kill other units, upgrade them to cause the most damage. Strategically place them as the waves of monsters get tougher and tougher until there are no more monsters left and you are victorious at last and can be named hero for saving everyone from the monsters.