The House of Atreus Act I, released in 1999 is the first part of a metal opera inspired by the  only extant example of an ancient Greek theatre trilogy which won first prize at what festival?
Oresteia The Oresteia (Ancient Greek: Ὀρέστεια ) is a trilogy of Greek tragedies written by Aeschylus concerning the murder of Agamemnon by Clytaemnestra, the murder of Clytaemnestra by Orestes, the trial of Orestes, the end of the curse on the House of Atreus and pacification of the Erinyes. The trilogy—consisting of "Agamemnon" (Ἀγαμέμνων ), "The Libation Bearers" (Χοηφóρoι ), and "The Eumenides" (Εὐμενίδες )—also shows how the Greek gods interacted with the characters and influenced their decisions pertaining to events and disputes. The only extant example of an ancient Greek theatre trilogy, the "Oresteia" won first prize at the Dionysia festival in 458 BC. Many consider the "Oresteia" to be Aeschylus' finest work. The principal themes of the trilogy include the contrast between revenge and justice, as well as the transition from personal vendetta to organized litigation. "Orestia" originally included a satyr play, "Proteus" (Πρωτεύς ), following the tragic trilogy, but all except a single line of "Proteus" has been lost.
God of War: Chains of Olympus God of War: Chains of Olympus is a third-person action-adventure video game developed by Ready at Dawn and Santa Monica Studio, and published by Sony Computer Entertainment (SCE). It was first released for the PlayStation Portable (PSP) handheld console on March 4, 2008. The game is the fourth installment in the "God of War" series, the second chronologically, and a prequel to the original "God of War". It is loosely based on Greek mythology and set in ancient Greece, with vengeance as its central motif. The player controls Kratos, a Spartan warrior who serves the Olympian Gods. Kratos is guided by the goddess Athena, who instructs him to find the Sun God Helios, as the Dream God Morpheus has caused many of the gods to slumber in Helios' absence. With the power of the Sun and the aid of the Titan Atlas, Morpheus and the Queen of the Underworld Persephone intend to destroy the Pillar of the World and in turn Olympus.