Killzone Liberation is a third-person tactical shooter video game exclusively developed for the PlayStation Portable (PSP). Released in October 2006, the game is a sequel to the original PlayStation 2 title 'Killzone'. It continues the story of the war between the ISA and the Helghast, focusing on the character Captain Jan Templar as he undertakes various missions to turn the tide of the war. The game features a top-down isometric view and allows the player to control vehicles in addition to on-foot navigation. Its single-player campaign is complemented by multiplayer modes.