PS Blog writes:
"Re-mastering both of the God of War PSP games in full HD for the PS3 God of War: Origins Collection definitely had its share of challenges for us. The first goal we had was simply the daunting task of up-rezing the engine and content authored on a PSP running at 480 x 272 resolution and 30 frames per second to 1920 x 1080p at a steady 60 fps on the PS3. This required a custom PS3 version of our engine, coded in-house exclusively for the Origins Collection, as well as a painstaking process by art team. We ended up going through every single character in the game and doubling or tripling polygon count by hand, as well as up-rezing and re-painting every texture across both games at 4x resolution on both characters and environments."