God of War: Chains of Olympus is an action-adventure game developed by Ready at Dawn exclusively for the PlayStation Portable. The game is the third installment in the God of War series and is the first chronologically, being the prequel to God of War. The game was released on March 4, 2008 in North America, March 28, 2008 in Europe and July 10, 2008 in Japan. This game is the second project developed for the PSP by Ready at Dawn, who was responsible for making the critically acclaimed Daxter, another handheld spin-off of a console series.Developer: Ready at Dawn Studios.