The document summarizes sound elements from the video game Halo 4. It describes the game's narrative as taking place on a Forerunner planet where the player's character awakens an evil alien named the Didact who plans to destroy Earth. It notes the game's genre is a first-person shooter with sounds of gunfire, vehicles, and aliens that enhance the sci-fi feel. It states the mood of the soundtrack uses instruments in different ways to create feelings of both sadness and happiness depending on what is happening in cut scenes, and that voice actors bring out emotions to match the mood.