Located in Irvine, California , Atlus U.S.A., Inc. is a publisher of challenging and engaging video games for a variety of platforms, including the Sony PlayStation 2, Nintendo DS and Game Boy Advance, and Microsoft Xbox. Founded in 1991, Atlus U.S.A., Inc. is best known for its library of classic role-playing games, including Ogre Battle, Disgaea: Hour of Darkness, Magna Carta: Tears of Blood, and the Shin Megami Tensei series.