Kingdom Rush

Kingdom Rush is a tower defense game developed by Ironhide Game Studio and published by Armor Games, released as a free flash browser game on July 28, 2011,[1] on the 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.