You'd be right, of course, but for fans the biggest challenge was in making sure Master Chief sounded right.ĭuring the Forward Unto Dawn postmortem at GDC, 343 Industries franchise development director Frank O'Connor noted that the casting of Master Chief was 'a source of much consternation' for series fans. You might think that the biggest challenge in creating Halo 4's Forward Unto Dawn series was translating one of gaming's most beloved franchises into a live-action film that was not only true to the source material, but also worth watching.