MHz processor. The faster processor allowed for more realistic blood effects, lighting effects, and shadows as well as improved enemy intelligence. The upgrade, however, noticeably decreased battery life. After the game's completion, Game Director Ru Weerasuriya stated multiplayer options and other puzzles, characters, and dialogue had to be removed due to time constraints. Audio Two of the voice actors returned from the previous installments to reprise their roles, which were Terrence C. Carson and Linda Hunt, who voiced Kratos and the narrator respectively. Erin Torpey adopted the dual roles of Athena and Eos. Fred Tatasciore, who voiced different characters in previous installments, returned, and in this game, voiced both Atlas and the Persian King. Carole Ruggier and Michael Clarke Duncan did not return to reprise their roles, which were Athena and Atlas respectively. Voice actor Dwight Schultz voiced both Charon and Helios; Debi Derryberry voiced Calliope and continued this role in a later installment; and Marina Gordon provided the voice of Persephone. Brian Kimmet, Don Luce, and Andrew Wheeler provided the voices of several minor characters and Keythe Farley was the Voice Director. The soundtrack was composed by Gerard K. Marino, but was never commercially released. After the release of the demo disc, Ready at Dawn offered pre-order customers a music track on disc titled "Battle of Attica". Composer Gerard Marino stated that it was the first cue written for the game, based on concept art and screenshots. Marino composed roughly thirteen minutes of music for the game and re-worked other music from the previous titles. Three tracks from the soundtrack are included as bonus tracks on the God of War: Ghost of Sparta soundtrack. Release The demo disc, officially titled God of War: Chains of Olympus – Special Edition: Battle of Attica, was released on September 27, 2007. In the demo, Kratos battles Persian soldiers and a giant basilisk. The demo progresses through the city of Attica as Kratos chases the basilisk, culminating with Kratos fighting the Persian King. The disc also included a developer video and a lanyard in the shape of the Greek letter Omega. Following the demo's release, a downloadable version was made available through the PlayStation Store in North American and European regions. Due to the delay of the game, Ready at Dawn offered a "special edition" version of the demo to pre-order customers, with one Ready at Dawn developer stating that preparation of the