Guerrilla Games is a first party video game developer and wholly owned subsidiary of Sony Computer Entertainment. The company is based in Amsterdam, the Netherlands, and Cambridge, UK. They currently employ approximately 270 individuals, and is headed by managing director Hermen Hulst.
The developer is best known for its Killzone series; exclusive to PlayStation. The most recent game in the series, Killzone Shadow Fall, was first released in North America on November 15th, 2013. On August 18th, 2010 during a press briefing at Gamescom in Cologne, Germany, managing director Hermen Hulst confirmed that Guerrilla Games’ next title would be an all-new intellectual property, making it Guerrilla’s first game not based on the Killzone series since Shellshock: Nam ’67. The game was officially announced at Sony’s E3 2015 press conference as Horizon Zero Dawn.
Official website: http://www.guerrilla-games.com/