Guerrilla Games has released some concept art of Killzone: Mercenary. Killzone: Mercenary is an upcoming first-person shooter video game for the PlayStation Vita. Developed by Guerrilla Cambridge, it is the second hand-held title in the Killzone series of video games, and fifth overall. It is scheduled for a September 2013 release. It is the first installment to not be developed by Guerrilla Games directly.