User Summary Kingdom Rush Frontiers is the sequel to 2011's Kingdom Rush. In Kingdom Rush Frontiers, the player places towers in pre-determined spots on each level to defeat waves of enemies. Towers can be upgraded, and the final upgrade of each tower type gives the player a choice of two different special towers, each with its own abilities. Although very similar to Kingdom Rush, Frontiers offers new types of enemies and 8 completely new special towers, plus the ability to use and upgrade heroes.