Tristia of the Deep-Blue Sea (Japanese: 蒼い海のトリスティア, Hepburn: Aoi Umi no Torisutia) is a PS2, PSP, and PC game, developed by Kogado Studio. This game is part of the Deep-Blue series along with the sequel, Neosphere of the Deep-Blue Sky (蒼い空のネオスフィア) and Akatsuki no Amaneka to Aoi Kyojin. The story has been adapted into an OVA, and has been released with a title of "發明工坊" in China, Hong Kong, Taiwan, U.S.A., Russia, and Poland. For the 10th anniversary celebration, this game was re-released on the PSP on August 9, 2012.