God of War: Origins Collection (known as God of War Collection – Volume II in Europe and Australia) is a remastered port of the two PlayStation Portable installments in the series—Chains of Olympus and Ghost of Sparta—for the PlayStation 3 on a single Blu-ray Disc. It was announced at the Sony press conference at E3 2011 and was ported by Ready at Dawn, the developer of the PlayStation Portable games. The collection was released on September 13, 2011, in North America, September 16 in Euro