Killzone is a first-pe File:Vis logo killzone.pngrson and third-person shooter series of video games exclusively for Sony Computer Entertainment's (SCE) video game consoles. The main series and the PSP installment was developed by Guerilla Games, a subsidiary of SCE. Killlzone currently consists of six games spanning over the PlayStation 2, PlayStation Portable, PlayStation 3, PlayStation Vita, and PlayStation 4. The series began on the PlayStation 2 in November 2004 with Killzone, and continued on the PlayStation Portable in October 2006 with Killzone: Liberation. Killzone 2 was released for the PlayStation 3 in February 2009, and Killzone 3 was released in February 2011 also for the PlayStation 3. Killzone: Mercenary was released for the PlayStation Vita in 2013. On February 20, 2013, Ki