Kingdom Rush is a highly-polished tower defense game that breathes new life into the genre. Protect your kingdom from an assortment of enemies, ranging from lowly orcs to wicked wizards. To do this, you will need to build towers at strategic points along your enemies' path. Some towers will deploy soldiers, which can be commanded on the path itself. Killing enemies will give you gold, which is needed to build and upgrade the towers. You can call in reinforcements and unleash a hellish rain on your enemies for free, but these specials have a cool-down period. Complete each stage to earn stars that can be used to improve your towers and specials. Unlock two additional modes for the stage by earning three stars in the normal mode. You can earn up to five stars in each stage.