Kingdom Rush is a tower defense game developed by Uruguay-based Ironhide Game Studio and published by Armor Games, released as a free flash browser game on July 28, 2011, on iPad on December 19, 2011, on Android in May 2013, and a Unity port in January 2014 via Steam. A sequel, Kingdom Rush: Frontiers, was released on June 6, 2013. The third installment of the franchise, Kingdom Rush: Origins, was launched on November 20, 2014. It was released on PC on October 18, 2018. On November 22, 2018, Ironhide Studios released a sequel, Kingdom Rush Vengeance, in which the player plays as Vez'nan's servant, helping him regain his throne. The game was released for the Nintendo Switch on July 30, 2020.