Guerrilla is a rapidly expanding game development studio with an established reputation as one of Europe's leading game developers. Founded in 2000 as the result of a merger between three smaller studios, Guerrilla now employs 130 developers from 20 different nationalities.

After the successful release of Killzone for PlayStation 2, Guerrilla was acquired by Sony Computer Entertainment in 2005. It went on to create the award-winning Killzone: Liberation for PlayStation Portable in 2006, and has recently released Killzone 2 for PlayStation 3 to worldwide popular and critical acclaim.