Killzone Mercenary dev working on next-gen game, job listing revealed. Killzone Mercenary developer Guerrilla Cambridge is hiring for work on a PlayStation 4 title, a job listing posted for the studio last week revealed. The ad seeks a "senior environment artist to join [Guerrilla Cambridge's] world-class art team working on PS4", but doesn't drop any hints as to what the game could be. A second job listing posted at the end of last year also sought work for "a major future project" using an "established rendering engine". Cambridge has yet to release a home console title since becoming a sister studio of Guerrilla Games, having only released PS Vita title Killzone Mercenary last year. Prior to working with Guerrilla, the studio worked on PS2 titles 24: The Game, Ghosthunter and Primal, and PS3 game TV Superstars. Sony has yet to announce Guerrilla Cambridge's next project.